BACKGROUND: Microbial activities involved in the dynamics of organic matter determine the potential for organic carbon (C) accumulation in soil. To understand this for paddy soil, an incubation experiment (25 \uffc2\uffb0C, 45% water\uffe2\uff80\uff90holding capacity) was established using 14C\uffe2\uff80\uff90labelled glucose and rice straw (500 \uffc2\uffb5g C g\uffe2\uff88\uff921 soil) as substrates; an adjacent upland soil was used for comparison.
RESULTS: The amount of microbial biomass in the paddy soil was approximately 6 times larger and its turnover rate was 1.5\uffe2\uff80\uff933 times faster than in the upland soil. These proportions of 14C\uffe2\uff80\uff90labelled glucose and rice straw mineralized in the paddy soil were about 3% smaller (P < 0.01) than those in the upland soil. Also, there was no significant priming effect of fresh substrate additions on the mineralization of native organic C in the paddy soil, while the priming effect was significant in the upland soil.
CONCLUSION: Although the paddy soil contains a large amount of microbial biomass, which is also very active, the mineralization of fresh substrates is significantly restricted in this soil, along with a small priming effect. This favours the accumulation of organic C in paddy soils. Copyright \uffc2\uffa9 2011 Society of Chemical Industry
", "keywords": ["2. Zero hunger", "Minerals", "Tropical Climate", "Agriculture", "Oryza", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "Carbon Cycle", "Soil", "Glucose", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Ecosystem", "Soil Microbiology"], "contacts": [{"organization": "Ping Zhou, John Keith Syers, Hongzhao Yuan, Yirong Su, Ling Li, Jinshui Wu,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1002/jsfa.4645"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.4645", "name": "item", "description": "10.1002/jsfa.4645", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.4645"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-12T00:00:00Z"}}, {"id": "10.1002/jsfa.7207", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:14:08Z", "type": "Journal Article", "created": "2015-04-10", "title": "Mineralization dynamics in soil fertilized with seaweed-fish waste compost", "description": "Seaweed and fish waste can be composted together to obtain fertilizer with high organic matter and nutrient contents. The nutrients, however, are mostly in organic form and must be mineralized to make them available to plants. The objective of this work was to establish a usage guideline for the compost by studying its mineralization dynamics. Also, the release of inorganic N and C from soil fertilized with the compost was monitored and modelled.C and N were released throughout the assay, to an extent significantly dependent on fertilizer rate. Mineralization of both elements fitted a first-order exponential model, and each fertilizer rate required using a specific fitting model. An increased rate favoured mineralization (especially of carbon). After 90 days, 2.3% of C and 7.7% of N were mineralized (and 23.3% of total nitrogen made plant available) with the higher rate.C mineralization was slow because organic matter in the compost was very stable. On the other hand, the relatively high initial content in mineral N of the compost increased gradually by the effect of mineralization. The amount of N available would suffice to meet the requirements of moderately demanding crops at the lower fertilizer rate, and even those of more demanding crops at the higher rate.", "keywords": ["Crops", " Agricultural", "2. Zero hunger", "Minerals", "Nitrogen", "0402 animal and dairy science", "Fishes", "Agriculture", "04 agricultural and veterinary sciences", "Seaweed", "Carbon", "Refuse Disposal", "Soil", "13. Climate action", "8. Economic growth", "Animals", "0401 agriculture", " forestry", " and fisheries", "0405 other agricultural sciences", "Fertilizers"]}, "links": [{"href": "http://onlinelibrary.wiley.com/wol1/doi/10.1002/jsfa.7207/fullpdf"}, {"href": "https://doi.org/10.1002/jsfa.7207"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.7207", "name": "item", "description": "10.1002/jsfa.7207", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.7207"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-05-22T00:00:00Z"}}, {"id": "10.1002/jsfa.7325", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:14:08Z", "type": "Journal Article", "created": "2015-06-30", "title": "Espresso coffee residues as a nitrogen amendment for small-scale vegetable production", "description": "Espresso coffee grounds constitute a residue which is produced daily in considerable amounts, and is often pointed out as being potentially interesting for plant nutrition. Two experiments (incubations and field experiments) were carried out to evaluate the potential nitrogen (N) and phosphorus (P) supply for carrot (Daucus carota L.), spinach (Spinacea oleracea L.) and lettuce (Lactuca sativa L.) nutrition.Immobilisation of nitrogen and phosphorus was detected in all the incubations and, in the field experiments, germination and yield growth were decreased by the presence of espresso coffee grounds, in general for all the species studied.The study showed an inhibition of N and P mineralisation and a reduction of plant germination and growth. Further research is required to determine whether this is related to the immobilising capacity of the residue or possibly due to the presence of caffeine.", "keywords": ["2. Zero hunger", "Minerals", "Nitrogen", "Plant Extracts", "0402 animal and dairy science", "Agriculture", "Coffea", "Germination", "Phosphorus", "04 agricultural and veterinary sciences", "Coffee", "01 natural sciences", "Daucus carota", "Soil", "Spinacia oleracea", "Caffeine", "Vegetables", "Humans", "0401 agriculture", " forestry", " and fisheries", "Biomass", "0405 other agricultural sciences", "Fertilizers", "Lactuca", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://onlinelibrary.wiley.com/wol1/doi/10.1002/jsfa.7325/fullpdf"}, {"href": "https://doi.org/10.1002/jsfa.7325"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.7325", "name": "item", "description": "10.1002/jsfa.7325", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.7325"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-07-28T00:00:00Z"}}, {"id": "10.1007/s00128-020-02835-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:14:24Z", "type": "Journal Article", "created": "2020-03-28", "title": "Fate of 2,4,6-tribromophenol in soil under different redox conditions.", "description": "Fate of 2,4,6-tribromophenol (TBP) in environmental matrices is obscure. We used 14C-tracer to investigated mineralization, transformation, and non-extractable residue (NER)-formation of TBP in a soil under continuously oxic, continuously anoxic, and anoxic-oxic alteration conditions. In all cases, TBP rapidly dissipated, mineralized to CO2, and formed NERs in the soil. Considerable amounts of transformation products (2-12%) were detected during the incubation. Marked mineralization (13-26%) indicated that soil microorganisms used TBP as their energy source. About 62-70% of the initial radioactivity was transformed into NERs, being mainly attributed to binding to humic and fulvic acid fractions. TBP transformation was significantly faster under oxic conditions than under anoxic conditions, and was boosted when the soil redox changed from anoxic to oxic state. The results provide new insights into fate of TBP in soil and suggest the importance to evaluate the stability of NERs for risk assessment of TBP in soil.", "keywords": ["Minerals", "Soil", "Phenols", "0211 other engineering and technologies", "Soil Pollutants", "Benzopyrans", "02 engineering and technology", "Oxidation-Reduction", "01 natural sciences", "Humic Substances", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://link.springer.com/content/pdf/10.1007/s00128-020-02835-8.pdf"}, {"href": "https://doi.org/10.1007/s00128-020-02835-8"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bulletin%20of%20Environmental%20Contamination%20and%20Toxicology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00128-020-02835-8", "name": "item", "description": "10.1007/s00128-020-02835-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00128-020-02835-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-03-28T00:00:00Z"}}, {"id": "10.1007/s00442-005-0222-1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:14:35Z", "type": "Journal Article", "created": "2005-10-04", "title": "Variations In Soil N Cycling And Trace Gas Emissions In Wet Tropical Forests", "description": "We used a previously described precipitation gradient in a tropical montane ecosystem of Hawai'i to evaluate how changes in mean annual precipitation (MAP) affect the processes resulting in the loss of N via trace gases. We evaluated three Hawaiian forests ranging from 2200 to 4050 mm year-1 MAP with constant temperature, parent material, ecosystem age, and vegetation. In situ fluxes of N2O and NO, soil inorganic nitrogen pools (NH4+ and NO3-), net nitrification, and net mineralization were quantified four times over 2 years. In addition, we performed 15N-labeling experiments to partition sources of N2O between nitrification and denitrification, along with assays of nitrification potential and denitrification enzyme activity (DEA). Mean NO and N2O emissions were highest at the mesic end of the gradient (8.7+/-4.6 and 1.1+/-0.3 ng N cm-2 h-1, respectively) and total oxidized N emitted decreased with increased MAP. At the wettest site, mean trace gas fluxes were at or below detection limit (2 mm). The amount of CO2 evolved varied significantly between soils (p\u22640.0001); particle sizes (p\u22640.0001) and the interactions of biochar source (p\u22640.001) and forms of biochars (p\u22640.0001) with soil types. Averaged across soils and sources of biochar, CO2-C evolved from dust-sized biochar (281 mg kg(-1)) was significantly higher than pellet-sized biochar (226 mg kg(-1)). Coxville soils with SS biochar produced the greatest average CO2-C of 428 mg kg(-1) and Norfolk soils with PC had the lowest CO2-C production (93 mg kg(-1)). Measured rates of carbon mineralization also varied with soils and sources of biochar (Norfolk: PL>SS>SG\u2265PC; Coxville: PC>SG>SS>PL). The average net CO2-C evolved from the Coxville soils (385 mg kg(-1)) was about threefold more than the CO2-C evolved from the Norfolk soils (123 mg kg(-1)). Our results suggest different particle sizes and sources of biochar as well as soil type influence biochar stability.", "keywords": ["2. Zero hunger", "Minerals", "Hot Temperature", "Swine", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "Carbon", "Poultry", "6. Clean water", "Manure", "Soil", "13. Climate action", "Charcoal", "11. Sustainability", "Animals", "0401 agriculture", " forestry", " and fisheries", "Particle Size", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.chemosphere.2013.12.024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Chemosphere", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.chemosphere.2013.12.024", "name": "item", "description": "10.1016/j.chemosphere.2013.12.024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.chemosphere.2013.12.024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-05-01T00:00:00Z"}}, {"id": "10.1016/j.envpol.2016.01.007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:16:40Z", "type": "Journal Article", "created": "2016-01-16", "title": "Effects Of Manure And Mineral Fertilization Strategies On Soil Antibiotic Resistance Gene Levels And Microbial Community In A Paddy-Upland Rotation System", "description": "This work investigated the responses of antibiotic resistance genes (ARGs) and the soil microbial community in a paddy-upland rotation system to mineral fertilizer (NPK) and different application dosages of manure combined with NPK. The occurrence of five tetracycline ARGs (tetA, tetB, tetC, tetG and tetW), two sulfonamide ARGs (sul1 and sul2) and one genetic element (IntI1) was quantified. NPK application showed only slight or no impact on soil ARGs abundances compared with the control without fertilizer. Soil ARGs abundances could be increased by manure-NPK application but was related to manure dosage (2250-9000 kg ha(-1)). Principal component analysis (PCA) showed that the soil ARG profile of the treatment with 9000 kg ha(-1) manure separated clearly from the other treatments; the ARGs that contributed most to the discrimination of this treatment were tetA, tetG, tetW, sul1, sul2 and IntI1. Community level physiological profile (CLPP) analysis showed that increasing manure dosage from 4500 kg ha(-1) to 9000 kg ha(-1) induced a sharp increase in almost all of the detected ARGs but would not change the microbial community at large. However, 9000 kg ha(-1) manure application produced a decline in soil microbial activity. Determination of antibiotics and heavy metals in soils suggested that the observed bloom of soil ARGs might associate closely with the accumulation of copper and zinc in soil.", "keywords": ["2. Zero hunger", "Minerals", "Rotation", "Agriculture", "Drug Resistance", " Microbial", "Oryza", "15. Life on land", "01 natural sciences", "6. Clean water", "Anti-Bacterial Agents", "Manure", "Soil", "Metals", " Heavy", "8. Economic growth", "Fertilizers", "Soil Microbiology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2016.01.007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envpol.2016.01.007", "name": "item", "description": "10.1016/j.envpol.2016.01.007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2016.01.007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-04-01T00:00:00Z"}}, {"id": "10.1016/j.gca.2023.01.029", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:16:58Z", "type": "Journal Article", "created": "2023-02-06", "title": "Competitive incorporation of Mn and Mg in vivianite at varying salinity and effects on crystal structure and morphology", "description": "Open AccessVivianite, a ferrous phosphate mineral, can be an important phosphorus (P) sink in non-sulfidic, reducing coastal sediments. The Fe in the crystal structure of vivianite can be substituted by other divalent metal cations such as Mn2+ or Mg2+. Since Mg is much more abundant in coastal porewaters than Mn, the more frequent reports of Mn substitution in vivianites of coastal sediments has been suggested to indicate a preferential incorporation of Mn over Mg into the crystal structure of vivianite. However, although both Mn and Mg substitution in vivianite are environmentally relevant, it is yet unknown whether Mn or Mg is preferentially incorporated and how these isomorphic substitutions alter the crystal structure and morphology of vivianite, parameters which may influence vivianite reactivity. Here, we studied the incorporation of Mn and/or Mg in vivianites formed by co-precipitation at pH 7 in the presence of varying dissolved Mn and/or Mg concentrations and solution salinities resembling an estuarine gradient from 0 to 9 psu. In total, 19 different vivianites were synthesized, with up to 50% of Fe substituted by Mn and Mg. Thermodynamic equilibrium calculations showed that aqueous Mg speciation was altered with increasing salinity, while Mn speciation was less affected, likely explaining the preferential incorporation of Mn in the vivianite structure at higher salinities. 57Fe-M\u00f6ssbauer spectroscopy revealed that both Mn and Mg were preferentially incorporated in the double-octahedral Fe position, at which intervalence charge transfer is possible during the oxidation of vivianite. In contrast to Mg, which is redox inactive, incorporated Mn can participate in heteronuclear intervalence charge transfer with Fe. Thus, incorporation of either cation may impact the reactivity of vivianite under oxidizing conditions in element specific ways. Results of complementary analyses including X-ray diffraction, electron microscopy and Fe K-edge X-ray absorption spectroscopy further showed that incorporation of Mn and/or Mg led to smaller particle size, increased crystal roughness and thinner crystals, as well as systematic changes in unit cell parameters. These observed changes in crystal morphology might impact the reactivity of vivianite in natural environments and thus the effect of cation incorporation in vivianite should be considered when studying Fe and P cycling in coastal sediments.", "keywords": ["M\u00f6ssbauer Spectroscopy", "550", "Isomorphic substitution", "13. Climate action", "Ferrous phosphate minerals", "Electron microscopy", "Ferrous phosphate minerals; Phosphorus burial; Isomorphic substitution; M\u00f6ssbauer Spectroscopy; Electron microscopy", "Phosphorus burial", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.gca.2023.01.029"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geochimica%20et%20Cosmochimica%20Acta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.gca.2023.01.029", "name": "item", "description": "10.1016/j.gca.2023.01.029", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.gca.2023.01.029"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-04-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2014.02.103", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:17:28Z", "type": "Journal Article", "created": "2014-03-19", "title": "Carbon Dioxide Emissions From Semi-Arid Soils Amended With Biochar Alone Or Combined With Mineral And Organic Fertilizers", "description": "Semi-arid soils cover a significant area of Earth's land surface and typically contain large amounts of inorganic C. Determining the effects of biochar additions on CO2 emissions from semi-arid soils is therefore essential for evaluating the potential of biochar as a climate change mitigation strategy. Here, we measured the CO2 that evolved from semi-arid calcareous soils amended with biochar at rates of 0 and 20tha(-1) in a full factorial combination with three different fertilizers (mineral fertilizer, municipal solid waste compost, and sewage sludge) applied at four rates (equivalent to 0, 75, 150, and 225kg potentially available Nha(-1)) during 182 days of aerobic incubation. A double exponential model, which describes cumulative CO2 emissions from two active soil C compartments with different turnover rates (one relatively stable and the other more labile), was found to fit very well all the experimental datasets. In general, the organic fertilizers increased the size and decomposition rate of the stable and labile soil C pools. In contrast, biochar addition had no effects on any of the double exponential model parameters and did not interact with the effects ascribed to the type and rate of fertilizer. After 182 days of incubation, soil organic and microbial biomass C contents tended to increase with increasing the application rates of organic fertilizer, especially of compost, whereas increasing the rate of mineral fertilizer tended to suppress microbial biomass. Biochar was found to increase both organic and inorganic C contents in soil and not to interact with the effects of type and rate of fertilizer on C fractions. As a whole, our results suggest that the use of biochar as enhancer of semi-arid soils, either alone or combined with mineral and organic fertilizers, is unlikely to increase abiotic and biotic soil CO2 emissions.", "keywords": ["Bioqu\u00edmica", "Mineral fertilizer", "Carbonates", "Waste Disposal", " Fluid", "01 natural sciences", "7. Clean energy", "12. Responsible consumption", "Soil", "Inorganic C", "11. Sustainability", "Fertilizers", "Environmental Restoration and Remediation", "0105 earth and related environmental sciences", "2. Zero hunger", "Soil organic matter", "Air Pollutants", "Minerals", "Agriculture", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "6. Clean water", "Biochar", "13. Climate action", "Charcoal", "0401 agriculture", " forestry", " and fisheries", "Organic amendment"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2014.02.103"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2014.02.103", "name": "item", "description": "10.1016/j.scitotenv.2014.02.103", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2014.02.103"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-06-01T00:00:00Z"}}, {"id": "10.1016/j.rse.2023.113986", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:17:25Z", "type": "Journal Article", "created": "2024-01-21", "title": "On-orbit calibration and performance of the EMIT imaging spectrometer", "description": "Open AccessArticle signat per 56 autors: David R. Thompson, Robert O. Green, Christine Bradley, Philip G. Brodrick, Natalie Mahowald, Eyal Ben Dor, Matthew Bennett, Michael Bernas, Nimrod Carmon, K. Dana Chadwick, Roger N. Clark, Red Willow Coleman, Evan Cox, Ernesto Diaz, Michael L. Eastwood, Regina Eckert, Bethany L. Ehlmann, Paul Ginoux, Mar\u00eda Gon\u00e7alves Ageitos, Kathleen Grant, Luis Guanter, Daniela Heller Pearlshtien, Mark Helmlinger, Harrison Herzog, Todd Hoefen, Yue Huang, Abigail Keebler, Olga Kalashnikova, Didier Keymeulen, Raymond Kokaly, Martina Klose, Longlei Li, Sarah R. Lundeen, John Meyer, Elizabeth Middleton, Ron L. Miller, Pantazis Mouroulis, Bogdan Oaida, Vincenzo Obiso, Francisco Ochoa, Winston Olson-Duvall, Gregory S. Okin, Thomas H. Painter, Carlos P\u00e9rez Garc\u00eda-Pando, Randy Pollock, Vincent Realmuto, Lucas Shaw, Peter Sullivan, Gregg Swayze, Erik Thingvold, Andrew K. Thorpe, Suresh Vannan, Catalina Villarreal, Charlene Ung, Daniel W. Wilson, Sander Zandbergen.", "keywords": ["Mineral dusts", "Teledetecci\u00f3", "550", "Radiative forcing", "7. Clean energy", "Validation", "\u00c0rees tem\u00e0tiques de la UPC::F\u00edsica::Astronomia i astrof\u00edsica", "Spectrometer--Calibration", "Pols minerals", "Visible-shortwave infrared spectroscopy", "info:eu-repo/classification/ddc/550", "ddc:550", "International space station", "Remote sensing", "Mineralogy", "Espect\u00f2metres--Calibratge", "Imaging spectroscopy", "EMIT", "Earth sciences", "Atmospheric correction", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria de la telecomunicaci\u00f3::Radiocomunicaci\u00f3 i exploraci\u00f3 electromagn\u00e8tica::Teledetecci\u00f3", "13. Climate action", "Hyperspectral imagery", "Calibration", "Mineral dust cycle", "NASA"]}, "links": [{"href": "https://doi.org/10.1016/j.rse.2023.113986"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Remote%20Sensing%20of%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.rse.2023.113986", "name": "item", "description": "10.1016/j.rse.2023.113986", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.rse.2023.113986"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-03-01T00:00:00Z"}}, {"id": "10.1021/acs.est.2c03925", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:15Z", "type": "Journal Article", "created": "2022-08-23", "title": "Coexisting Goethite Promotes Fe(II)-Catalyzed Transformation of Ferrihydrite to Goethite", "description": "Open AccessISSN:0013-936X", "keywords": ["Minerals", "template-directed nucleation", "Fe(II)\u2212Fe(III) electron transfer", "recrystallization", "Water", "electron hopping", "Ferric Compounds", "01 natural sciences", "Catalysis", "Soil", "Isotopes", "13. Climate action", "Ferrous Compounds", "labile Fe(III)", "Oxidation-Reduction", "Iron Compounds", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.2c03925"}, {"href": "https://doi.org/10.1021/acs.est.2c03925"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.2c03925", "name": "item", "description": "10.1021/acs.est.2c03925", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.2c03925"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-08-23T00:00:00Z"}}, {"id": "10.1021/acs.est.1c08789", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:14Z", "type": "Journal Article", "created": "2022-04-18", "title": "Stabilization of Ferrihydrite and Lepidocrocite by Silicate during Fe(II)-Catalyzed Mineral Transformation: Impact on Particle Morphology and Silicate Distribution", "description": "Open AccessISSN:0013-936X", "keywords": ["Minerals", "magnetite", "Silicates", "elemental mapping", "Water", "Ferric Compounds", "01 natural sciences", "Catalysis", "Ferrosoferric Oxide", "atom exchange", "Soil", "iron", "redox", "goethite", "Oxidation-Reduction", "crystal morphology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.1c08789"}, {"href": "https://doi.org/10.1021/acs.est.1c08789"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.1c08789", "name": "item", "description": "10.1021/acs.est.1c08789", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.1c08789"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-04-18T00:00:00Z"}}, {"id": "10.1021/acs.est.3c01336", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:15Z", "type": "Journal Article", "created": "2023-06-09", "title": "Coprecipitation with Ferrihydrite Inhibits Mineralization of Glucuronic Acid in an Anoxic Soil", "description": "Open AccessISSN:0013-936X", "keywords": ["Soil", "Minerals", "Iron", "organic carbon", "anoxic soils", "organic carbon; anoxic soils; mineralization; iron minerals", "mineralization", "Ferric Compounds", "Oxidation-Reduction", "iron minerals", "Carbon"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c01336"}, {"href": "https://doi.org/10.1021/acs.est.3c01336"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.3c01336", "name": "item", "description": "10.1021/acs.est.3c01336", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.3c01336"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-06-09T00:00:00Z"}}, {"id": "10.1021/acs.est.3c00434", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:15Z", "type": "Journal Article", "created": "2023-06-26", "title": "A New Approach for Investigating Iron Mineral Transformations in Soils and Sediments Using 57Fe-Labeled Minerals and 57Fe M\u00f6ssbauer Spectroscopy", "description": "Open AccessIron minerals in soils and sediments play important roles in many biogeochemical processes and therefore influence the cycling of major and trace elements and the fate of pollutants in the environment. However, the kinetics and pathways of Fe mineral recrystallization and transformation processes under environmentally relevant conditions are still elusive. Here, we present a novel approach enabling us to follow the transformations of Fe minerals added to soils or sediments in close spatial association with complex solid matrices including other minerals, organic matter, and microorganisms. Minerals enriched with the stable isotope 57Fe are mixed with soil or sediment, and changes in Fe speciation are subsequently studied by 57Fe M\u00f6ssbauer spectroscopy, which exclusively detects 57Fe. In this study, 57Fe-labeled ferrihydrite was synthesized, mixed with four soils differing in chemical and physical properties, and incubated for 12+ weeks under anoxic conditions. Our results reveal that the formation of crystalline Fe(III)(oxyhydr)oxides such as lepidocrocite and goethite was strongly suppressed, and instead formation of a green rust-like phase was observed in all soils. These results contrast those from Fe(II)-catalyzed ferrihydrite transformation experiments, where formation of lepidocrocite, goethite, and/or magnetite often occurs. The presented approach allows control over the composition and crystallinity of the initial Fe mineral, and it can be easily adapted to other experimental setups or Fe minerals. It thus offers great potential for future investigations of Fe mineral transformations in situ under environmentally relevant conditions, in both the laboratory and the field.", "keywords": ["Minerals", "550", "Iron", "iron reduction", "01 natural sciences", "Ferric Compounds", "ferrihydrite", "microcosm", "Soil", "Spectroscopy", " Mossbauer", "green rust", "13. Climate action", "Oxidation-Reduction", "Fe(II)-catalyzed transformation", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1021/acs.est.3c00434"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.3c00434", "name": "item", "description": "10.1021/acs.est.3c00434", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.3c00434"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-06-26T00:00:00Z"}}, {"id": "10.1021/acs.est.4c01519", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:15Z", "type": "Journal Article", "created": "2024-06-04", "title": "Iron Oxyhydroxide Transformation in a Flooded Rice Paddy Field and the Effect of Adsorbed Phosphate", "description": "Open AccessISSN:0013-936X", "keywords": ["2. Zero hunger", "Minerals", "Iron", "iron reduction", "Oryza", "15. Life on land", "Ferric Compounds", "ferrihydrite", "6. Clean water", "Phosphates", "Mossbauer", "Soil", "Spectroscopy", " Mossbauer", "Fe(II)-catalyzed", "lepidocrocite", "13. Climate action", "microsite", "Adsorption", "isotope", "Oxidation-Reduction"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.4c01519"}, {"href": "https://doi.org/10.1021/acs.est.4c01519"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.4c01519", "name": "item", "description": "10.1021/acs.est.4c01519", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.4c01519"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-06-04T00:00:00Z"}}, {"id": "10.1021/acs.est.4c10710", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:15Z", "type": "Journal Article", "created": "2024-12-25", "title": "In Situ Vivianite Formation in Intertidal Sediments: Ferrihydrite-Adsorbed P Triggers Vivianite Formation", "description": "Open AccessISSN:0013-936X", "keywords": ["Geologic Sediments", "Spectroscopy", " Mossbauer", "Mo\u0308ssbauer spectroscopy", "Phosphorus", "Adsorption", "Ferrous Compounds", "coastal sediments", "Ferric Compounds", "iron minerals", "Phosphates", "phosphorus cycling"], "contacts": [{"organization": "Kubeneck, L. Jo\u00eblle, Rothwell, Katherine A., Notini, Luiza, ThomasArrigo, Laurel K., Schulz, Katrin, Fantappi\u00e8, Giulia, Joshi, Prachi, Huthwelker, Thomas, Kretzschmar, Ruben,", "roles": ["creator"]}]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.4c10710"}, {"href": "https://doi.org/10.1021/acs.est.4c10710"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.4c10710", "name": "item", "description": "10.1021/acs.est.4c10710", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.4c10710"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-12-25T00:00:00Z"}}, {"id": "10.1038/s41467-022-31540-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:39Z", "type": "Journal Article", "created": "2022-07-01", "title": "Global stocks and capacity of mineral-associated soil organic carbon", "description": "AbstractSoil is the largest terrestrial reservoir of organic carbon and is central for climate change mitigation and carbon-climate feedbacks. Chemical and physical associations of soil carbon with minerals play a critical role in carbon storage, but the amount and global capacity for storage in this form remain unquantified. Here, we produce spatially-resolved global estimates of mineral-associated organic carbon stocks and carbon-storage capacity by analyzing 1144 globally-distributed soil profiles. We show that current stocks total 899 Pg C to a depth of 1\uffe2\uff80\uff89m in non-permafrost mineral soils. Although this constitutes 66% and 70% of soil carbon in surface and deeper layers, respectively, it is only 42% and 21% of the mineralogical capacity. Regions under agricultural management and deeper soil layers show the largest undersaturation of mineral-associated carbon. Critically, the degree of undersaturation indicates sequestration efficiency over years to decades. We show that, across 103 carbon-accrual measurements spanning management interventions globally, soils furthest from their mineralogical capacity are more effective at accruing carbon; sequestration rates average 3-times higher in soils at one tenth of their capacity compared to soils at one half of their capacity. Our findings provide insights into the world\uffe2\uff80\uff99s soils, their capacity to store carbon, and priority regions and actions for soil carbon management.Abstract. The composition of soil dust aerosols derives from the mineral abundances in the parent soils that vary across dust source regions. Nonetheless, Earth system models (ESMs) have traditionally represented mineral dust as a globally homogeneous species. The growing interest in modeling dust mineralogy, facilitated by the recognized sensitivity of the dust climate impacts to composition, has motivated state-of-the-art ESMs to incorporate the mineral speciation of dust along with its effect upon the dust direct radiative effect (DRE). In this work, we enable the NASA Goddard Institute for Space Studies ModelE2.1 to calculate the shortwave (SW) DRE accounting for the regionally varying soil mineralogy. Mineral\u2013radiation interaction at solar wavelengths is calculated according to two alternative coupling schemes: (1)\u00a0external mixing of three mineral components that are optically distinguished, one of which contains embedded iron oxides; (2)\u00a0a single internal mixture of all dust minerals with a dynamic fraction of iron oxides that varies regionally and temporally. We link dust absorption to the fractional mass of iron oxides based on recent chamber measurements using natural dust aerosol samples. We show that coupled mineralogy overall enhances the scattering by dust, and thus the global cooling, compared to our control run with globally uniform composition. According to the external mixing scheme, the SW DRE at the top of atmosphere (TOA) changes from \u22120.25 to -0.30Wm-2, corresponding to a change in the net DRE, including the longwave effect, from \u22120.08 to -0.12Wm-2. The cooling increase is accentuated when the internal mixing scheme is configured: the SW DRE at the TOA becomes -0.34Wm-2 with a net DRE of -0.15Wm-2. The varying composition modifies the regional distribution of single scattering albedo (SSA), whose variations in specific regions can be remarkable (above 0.03) and significantly modify the regional SW DRE. Evaluation against the AErosol RObotic NETwork (AERONET) shows that explicit representation of soil mineralogy and its regional variations reduces the low bias of model dust SSA while improving the range of variability across stations and calendar months. Despite these improvements, the moderate spatiotemporal correlation with AERONET reveals remaining modeling challenges and the need for more accurate measurements of mineral fractions in soils.
", "keywords": ["[SDE] Environmental Sciences", "Mineral dusts", "Radiation", "Physics", "QC1-999", "Cicle hidrol\u00f2gic", "15. Life on land", "Aerosols atmosf\u00e8rics", "01 natural sciences", "Radiaci\u00f3", "Chemistry", "13. Climate action", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria civil::Geologia::Mineralogia", "Pols minerals", "QD1-999", "Atmospheric aerosol", "\u00c0rees tem\u00e0tiques de la UPC::Desenvolupament hum\u00e0 i sostenible::Degradaci\u00f3 ambiental", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://acp.copernicus.org/articles/24/5337/2024/acp-24-5337-2024.pdf"}, {"href": "https://doi.org/10.5194/acp-24-5337-2024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Chemistry%20and%20Physics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/acp-24-5337-2024", "name": "item", "description": "10.5194/acp-24-5337-2024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/acp-24-5337-2024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-06-05T00:00:00Z"}}, {"id": "10.5194/acp-24-7421-2024", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:23:23Z", "type": "Journal Article", "created": "2024-06-28", "title": "Modeling impacts of dust mineralogy on fast climate response", "description": "Abstract. Mineralogical composition drives dust impacts on Earth's climate systems. However, most climate models still use homogeneous dust, without accounting for the temporal and spatial variation in mineralogy. To quantify the radiative impact of resolving dust mineralogy on Earth's climate, we implement and simulate the distribution of dust minerals (i.e., illite, kaolinite, smectite, hematite, calcite, feldspar, quartz, and gypsum) from Claquin et\u00a0al. (1999) (C1999) and activate their interaction with radiation in the GFDL AM4.0 model. Resolving mineralogy reduces dust absorption compared to the homogeneous dust used in the standard GFDL AM4.0 model that assumes a globally uniform hematite volume content of 2.7\u2009% (HD27). The reduction in dust absorption results in improved agreement with observation-based single-scattering albedo (SSA), radiative fluxes from CERES (the Clouds and the Earth's Radiant Energy System), and land surface temperature from the CRU (Climatic Research Unit) compared to the baseline HD27 model version. It also results in distinct radiative impacts on Earth's climate over North Africa. Over the 19-year (from 2001 to 2019) modeled period during JJA (June\u2013July\u2013August), the reduction in dust absorption in AM4.0 leads to a reduction of over 50\u2009% in net downward radiation across the Sahara and approximately 20\u2009% over the Sahel at the top of the atmosphere (TOA) compared to the baseline HD27 model version. The reduced dust absorption weakens the atmospheric warming effect of dust aerosols and leads to an alteration in land surface temperature, resulting in a decrease of 0.66\u2009K over the Sahara and an increase of 0.7\u2009K over the Sahel. The less warming in the atmosphere suppresses ascent and weakens the monsoon inflow from the Gulf of Guinea. This brings less moisture to the Sahel, which combined with decreased ascent induces a reduction of precipitation. To isolate the effect of reduced absorption compared to resolving spatial and temporal mineralogy, we carry out a simulation where the hematite volume content of homogeneous dust is reduced from 2.7\u2009% to 0.9\u2009% (HD09). The dust absorption (e.g., single-scattering albedo) of HD09 is comparable to that of the mineralogically speciated model on a global mean scale, albeit with a lower spatial variation that arises solely from particle size. Comparison of the two\u00a0models indicates that the spatial inhomogeneity in dust absorption resulting from resolving mineralogy does not have significant impacts on Earth's radiation and climate, provided there is a similar level of dust absorption on a global mean scale before and after resolving dust mineralogy. However, uncertainties related to emission and distribution of minerals may blur the advantages of resolving minerals to study their impact on radiation, cloud properties, ocean biogeochemistry, air quality, and photochemistry. On the other hand, lumping together clay minerals (i.e., illite, kaolinite, and smectite), but excluding externally mixed hematite and gypsum, appears to provide both computational efficiency and relative accuracy. Nevertheless, for specific research, it may be necessary to fully resolve mineralogy to achieve accuracy.
", "keywords": ["Mineral dusts", "Climatology", "Physics", "QC1-999", "\u00c0rees tem\u00e0tiques de la UPC::F\u00edsica", "15. Life on land", "01 natural sciences", "Chemistry", "13. Climate action", "Climatologia", "Radiative transfer", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria civil::Geologia::Mineralogia", "Pols minerals", "QD1-999", "Transfer\u00e8ncia radiativa", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://acp.copernicus.org/articles/24/7421/2024/acp-24-7421-2024.pdf"}, {"href": "https://doi.org/10.5194/acp-24-7421-2024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Chemistry%20and%20Physics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/acp-24-7421-2024", "name": "item", "description": "10.5194/acp-24-7421-2024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/acp-24-7421-2024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-06-28T00:00:00Z"}}, {"id": "10.1038/s43247-024-01441-4", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:46Z", "type": "Journal Article", "created": "2024-06-04", "title": "Improved constraints on hematite refractive index for estimating climatic effects of dust aerosols", "description": "Abstract
Uncertainty in desert dust composition poses a big challenge to understanding Earth\uffe2\uff80\uff99s climate across different epochs. Of particular concern is hematite, an iron-oxide mineral dominating the solar absorption by dust particles, for which current estimates of absorption capacity vary by over two orders of magnitude. Here, we show that laboratory measurements of dust composition, absorption, and scattering provide valuable constraints on the absorption potential of hematite, substantially narrowing its range of plausible values. The success of this constraint is supported by results from an atmospheric transport model compared with station-based measurements. Additionally, we identify substantial bias in simulating hematite abundance in dust aerosols with current soil mineralogy descriptions, underscoring the necessity for improved data sources. Encouragingly, the next-generation imaging spectroscopy remote sensing data hold promise for capturing the spatial variability of hematite. These insights have implications for enhancing dust modeling, thus contributing to efforts in climate change mitigation and adaptation.The rate and pathway of ferrihydrite transformation in soil depends on the properties of the soil pore water and diffusion processes.
", "keywords": ["Chemistry", "Soil", "Minerals", "Iron", "Water", "Ferrous Compounds", "Ferric Compounds", "Oxidation-Reduction", "01 natural sciences", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://pubs.rsc.org/en/content/articlepdf/2022/EM/D2EM00290F"}, {"href": "https://doi.org/10.1039/d2em00290f"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%3A%20Processes%20%26amp%3B%20Impacts", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1039/d2em00290f", "name": "item", "description": "10.1039/d2em00290f", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1039/d2em00290f"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-01T00:00:00Z"}}, {"id": "10.1039/d3em00314k", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:50Z", "type": "Journal Article", "created": "2023-11-16", "title": "Contact with soil impacts ferrihydrite and lepidocrocite transformations during redox cycling in a paddy soil", "description": "
We studied the transformation of 57Fe-labelled ferrihydrite and lepidocrocite mixed with a flooded paddy soil by using 57Fe-M\uffc3\uffb6ssbauer spectroscopy.Siderite is stabilised against oxidation in the presence of Low Molecular Weight Organic Acids (LMWOAs) with implications for iron mineral transformations and therefore contaminant and nutrient cycling.
", "keywords": ["Molecular Weight", "570", "Chemistry", "Minerals", "550", "Models", " Chemical", "Carbonates", "Oxidation-Reduction", "Ferric Compounds", "Iron Compounds"]}, "links": [{"href": "http://pubs.rsc.org/en/content/articlepdf/2025/EM/D4EM00363B"}, {"href": "https://doi.org/10.1039/d4em00363b"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%3A%20Processes%20%26amp%3B%20Impacts", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1039/d4em00363b", "name": "item", "description": "10.1039/d4em00363b", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1039/d4em00363b"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-01-01T00:00:00Z"}}, {"id": "10.1088/1748-9326/ab9a6d", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:28Z", "type": "Journal Article", "created": "2020-06-08", "title": "The next generation of climate model should account for the evolution of mineral-organic interactions with permafrost thaw", "description": "The Earth\u2019s high latitude regions are warming twice as fast as the global average which enhances the thawing of permafrost, i.e. the perennially frozen ground which underlies about 25% of the exposed land surface in the Northern Hemisphere (Brown et al 1998). Permafrost thaw exposes previously frozen organic carbon (OC) to microbial decomposition with subsequent emission of the greenhouse gases carbon dioxide (CO2) and methane (CH4) into the atmosphere, creating positive feedback on global warming, i.e. the permafrost carbon feedback (Schuur et al 2015). Permafrost contains 1460\u20131600 GtC, almost twice the C in the atmosphere (IPCC 2019), and 15 \u00b1 3% of that OC stock could be emitted as greenhouse gases by 2100 (Schuur et al 2015). On an annual basis, this would represent 22%\u201331% of the current anthropogenic C emissions (considering anthropogenic C emissions from IPCC 2019). Most of that C would be emitted as CO2 but it is estimated that 2.3% of the permafrost C emissions will be released as CH4 (Schuur et al 2015). This has implications for the Earth\u2019s radiative balance, given the larger global warming potential of CH4 at the century time scale. Therefore, evidence is mounting that permafrost thaw represents a tipping element in the Earth climate system (Lenton et al 2019). Yet uncertainties are associated with how this will unfold.", "keywords": ["organic", "Science", "QC1-999", "Environmental technology. Sanitary engineering", "01 natural sciences", "7. Clean energy", "arctic", "GE1-350", "Renewable Energy", "TD1-1066", "General Environmental Science", "0105 earth and related environmental sciences", "Sustainability and the Environment", "carbon", "organic carbon", "Physics", "Environmental and Occupational Health", "Q", "minerals", "15. Life on land", "artic", "Environmental sciences", "13. Climate action", "Public Health", "thaw", "carbon emissions", "permafrost"], "contacts": [{"organization": "Sophie Opfergelt", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1088/1748-9326/ab9a6d"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Research%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1088/1748-9326/ab9a6d", "name": "item", "description": "10.1088/1748-9326/ab9a6d", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1088/1748-9326/ab9a6d"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-21T00:00:00Z"}}, {"id": "10.1098/rsta.2023.0139", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:39Z", "type": "Journal Article", "created": "2023-10-10", "title": "Relating mineral\u2013organic matter stabilization mechanisms to carbon quality and age distributions using ramped thermal analysis", "description": "
Organic carbon (OC) association with soil minerals stabilizes OC on timescales reflecting the strength of mineral\uffe2\uff80\uff93C interactions. We applied ramped thermal oxidation to subsoil B horizons with different mineral\uffe2\uff80\uff93C associations to separate OC according to increasing temperature of oxidation, i.e. thermal activation energy. Generally, OC released at lower temperatures was richer in bioavailable forms like polysaccharides, while OC released at higher temperatures was more aromatic. Organic carbon associated with pedogenic oxides was released at lower temperatures and had a narrow range of 14 C content. By contrast, N-rich compounds were released at higher temperatures from samples with 2\uffe2\uff80\uff89:\uffe2\uff80\uff891 clays and short-range ordered (SRO) amorphous minerals. Temperatures of release overlapped for SRO minerals and crystalline oxides, although the mean age of OC released was older for the SRO. In soils with more mixed mineralogy, the added presence of older OC released at temperatures greater than 450\uffc2\uffb0C from clays resulted in a broader distribution of OC ages within the sample, especially for soils rich in 2\uffe2\uff80\uff89:\uffe2\uff80\uff891 layer expandable clays such as smectite. While pedogenic setting affects mineral stability and absolute OC age, mineralogy controls the structure of OC age distribution within a sample, which may provide insight into model structures and OC dynamics under changing conditions.
This article is part of the Theo Murphy meeting issue \uffe2\uff80\uff98Radiocarbon in the Anthropocene\uffe2\uff80\uff99.Soil organic carbon (SOC) sequestration is a promising climate change mitigation option. In this context, the formation of the relatively long\uffe2\uff80\uff90lived mineral\uffe2\uff80\uff90associated organic carbon (MAOC) is key. To date, soils are considered to be limited in their ability to accumulate MAOC, mainly by the amount of clay and silt particles present. Using the comprehensive German Agricultural Soil Inventory, we selected 189 samples with a wide range of SOC (5\uffe2\uff80\uff93118\uffe2\uff80\uff89g\uffe2\uff80\uff89kg\uffe2\uff88\uff921) and clay contents (30\uffe2\uff80\uff93770\uffe2\uff80\uff89g\uffe2\uff80\uff89kg\uffe2\uff88\uff921) to test whether there is a detectable upper limit of MAOC content. We found that the proportion of MAOC was surprisingly stable for soils under cropland and grassland use across the whole range of bulk SOC contents. Soil texture influenced the slope of the relationship between bulk SOC and MAOC, but no upper limit was observed in any texture class. Also, C content in the fine fraction (g\uffe2\uff80\uff89C\uffe2\uff80\uff89kg\uffe2\uff88\uff921 fraction) was negatively correlated to fine fraction content (g\uffe2\uff80\uff89kg\uffe2\uff88\uff921 bulk soil). Both findings challenge the notion that MAOC accumulation is limited by soil fine fraction content per se.Given the importance of soil for the global carbon cycle, it is essential to understand not only how much carbon soil stores but also how long this carbon persists. Previous studies have shown that the amount and age of soil carbon are strongly affected by the interaction of climate, vegetation, and mineralogy. However, these findings are primarily based on studies from temperate regions and from fine\uffe2\uff80\uff90scale studies, leaving large knowledge gaps for soils from understudied regions such as sub\uffe2\uff80\uff90Saharan Africa. In addition, there is a lack of data to validate modeled soil C dynamics at broad scales. Here, we present insights into organic carbon cycling, based on a new broad\uffe2\uff80\uff90scale radiocarbon and mineral dataset for sub\uffe2\uff80\uff90Saharan Africa. We found that in moderately weathered soils in seasonal climate zones with poorly crystalline and reactive clay minerals, organic carbon persists longer on average (topsoil: 201\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff89130\uffe2\uff80\uff89years; subsoil: 645\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff89385\uffe2\uff80\uff89years) than in highly weathered soils in humid regions (topsoil: 140\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff8946\uffe2\uff80\uff89years; subsoil: 454\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff89247\uffe2\uff80\uff89years) with less reactive minerals. Soils in arid climate zones (topsoil: 396\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff89339\uffe2\uff80\uff89years; subsoil: 963\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff89669\uffe2\uff80\uff89years) store organic carbon for periods more similar to those in seasonal climate zones, likely reflecting climatic constraints on weathering, carbon inputs and microbial decomposition. These insights into the timescales of organic carbon persistence in soils of sub\uffe2\uff80\uff90Saharan Africa suggest that a process\uffe2\uff80\uff90oriented grouping of soils based on pedo\uffe2\uff80\uff90climatic conditions may be useful to improve predictions of soil responses to climate change at broader scales.Abstract. The composition of soil dust aerosols derives from the mineral abundances in the parent soils that vary across dust source regions. Nonetheless, Earth system models (ESMs) have traditionally represented mineral dust as a globally homogeneous species. The growing interest in modeling dust mineralogy, facilitated by the recognized sensitivity of the dust climate impacts to composition, has motivated state-of-the-art ESMs to incorporate the mineral speciation of dust along with its effect upon the dust direct radiative effect (DRE). In this work, we enable the NASA Goddard Institute for Space Studies ModelE2.1 to calculate the shortwave (SW) DRE accounting for the regionally varying soil mineralogy. Mineral\u2013radiation interaction at solar wavelengths is calculated according to two alternative coupling schemes: (1)\u00a0external mixing of three mineral components that are optically distinguished, one of which contains embedded iron oxides; (2)\u00a0a single internal mixture of all dust minerals with a dynamic fraction of iron oxides that varies regionally and temporally. We link dust absorption to the fractional mass of iron oxides based on recent chamber measurements using natural dust aerosol samples. We show that coupled mineralogy overall enhances the scattering by dust, and thus the global cooling, compared to our control run with globally uniform composition. According to the external mixing scheme, the SW DRE at the top of atmosphere (TOA) changes from \u22120.25 to -0.30Wm-2, corresponding to a change in the net DRE, including the longwave effect, from \u22120.08 to -0.12Wm-2. The cooling increase is accentuated when the internal mixing scheme is configured: the SW DRE at the TOA becomes -0.34Wm-2 with a net DRE of -0.15Wm-2. The varying composition modifies the regional distribution of single scattering albedo (SSA), whose variations in specific regions can be remarkable (above 0.03) and significantly modify the regional SW DRE. Evaluation against the AErosol RObotic NETwork (AERONET) shows that explicit representation of soil mineralogy and its regional variations reduces the low bias of model dust SSA while improving the range of variability across stations and calendar months. Despite these improvements, the moderate spatiotemporal correlation with AERONET reveals remaining modeling challenges and the need for more accurate measurements of mineral fractions in soils.
", "keywords": ["[SDE] Environmental Sciences", "Mineral dusts", "Radiation", "Physics", "QC1-999", "Cicle hidrol\u00f2gic", "15. Life on land", "Aerosols atmosf\u00e8rics", "01 natural sciences", "Radiaci\u00f3", "Chemistry", "13. Climate action", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria civil::Geologia::Mineralogia", "Pols minerals", "QD1-999", "Atmospheric aerosol", "\u00c0rees tem\u00e0tiques de la UPC::Desenvolupament hum\u00e0 i sostenible::Degradaci\u00f3 ambiental", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://acp.copernicus.org/articles/24/5337/2024/acp-24-5337-2024.pdf"}, {"href": "https://doi.org/2117/407828"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Chemistry%20and%20Physics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2117/407828", "name": "item", "description": "2117/407828", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2117/407828"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-06-05T00:00:00Z"}}, {"id": "2117/411014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:27:55Z", "type": "Journal Article", "created": "2024-06-28", "title": "Modeling impacts of dust mineralogy on fast climate response", "description": "Abstract. Mineralogical composition drives dust impacts on Earth's climate systems. However, most climate models still use homogeneous dust, without accounting for the temporal and spatial variation in mineralogy. To quantify the radiative impact of resolving dust mineralogy on Earth's climate, we implement and simulate the distribution of dust minerals (i.e., illite, kaolinite, smectite, hematite, calcite, feldspar, quartz, and gypsum) from Claquin et\u00a0al. (1999) (C1999) and activate their interaction with radiation in the GFDL AM4.0 model. Resolving mineralogy reduces dust absorption compared to the homogeneous dust used in the standard GFDL AM4.0 model that assumes a globally uniform hematite volume content of 2.7\u2009% (HD27). The reduction in dust absorption results in improved agreement with observation-based single-scattering albedo (SSA), radiative fluxes from CERES (the Clouds and the Earth's Radiant Energy System), and land surface temperature from the CRU (Climatic Research Unit) compared to the baseline HD27 model version. It also results in distinct radiative impacts on Earth's climate over North Africa. Over the 19-year (from 2001 to 2019) modeled period during JJA (June\u2013July\u2013August), the reduction in dust absorption in AM4.0 leads to a reduction of over 50\u2009% in net downward radiation across the Sahara and approximately 20\u2009% over the Sahel at the top of the atmosphere (TOA) compared to the baseline HD27 model version. The reduced dust absorption weakens the atmospheric warming effect of dust aerosols and leads to an alteration in land surface temperature, resulting in a decrease of 0.66\u2009K over the Sahara and an increase of 0.7\u2009K over the Sahel. The less warming in the atmosphere suppresses ascent and weakens the monsoon inflow from the Gulf of Guinea. This brings less moisture to the Sahel, which combined with decreased ascent induces a reduction of precipitation. To isolate the effect of reduced absorption compared to resolving spatial and temporal mineralogy, we carry out a simulation where the hematite volume content of homogeneous dust is reduced from 2.7\u2009% to 0.9\u2009% (HD09). The dust absorption (e.g., single-scattering albedo) of HD09 is comparable to that of the mineralogically speciated model on a global mean scale, albeit with a lower spatial variation that arises solely from particle size. Comparison of the two\u00a0models indicates that the spatial inhomogeneity in dust absorption resulting from resolving mineralogy does not have significant impacts on Earth's radiation and climate, provided there is a similar level of dust absorption on a global mean scale before and after resolving dust mineralogy. However, uncertainties related to emission and distribution of minerals may blur the advantages of resolving minerals to study their impact on radiation, cloud properties, ocean biogeochemistry, air quality, and photochemistry. On the other hand, lumping together clay minerals (i.e., illite, kaolinite, and smectite), but excluding externally mixed hematite and gypsum, appears to provide both computational efficiency and relative accuracy. Nevertheless, for specific research, it may be necessary to fully resolve mineralogy to achieve accuracy.
", "keywords": ["Mineral dusts", "Climatology", "Physics", "QC1-999", "\u00c0rees tem\u00e0tiques de la UPC::F\u00edsica", "15. Life on land", "01 natural sciences", "Chemistry", "13. Climate action", "Climatologia", "Radiative transfer", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria civil::Geologia::Mineralogia", "Pols minerals", "QD1-999", "Transfer\u00e8ncia radiativa", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://acp.copernicus.org/articles/24/7421/2024/acp-24-7421-2024.pdf"}, {"href": "https://doi.org/2117/411014"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Chemistry%20and%20Physics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2117/411014", "name": "item", "description": "2117/411014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2117/411014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-06-28T00:00:00Z"}}, {"id": "10.1128/aem.01536-06", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:20:30Z", "type": "Journal Article", "created": "2006-11-14", "title": "Community Structure Of Ammonia-Oxidizing Bacteria Under Long-Term Application Of Mineral Fertilizer And Organic Manure In A Sandy Loam Soil", "description": "ABSTRACT
The effects of mineral fertilizer (NPK) and organic manure on the community structure of soil ammonia-oxidizing bacteria (AOB) was investigated in a long-term (16-year) fertilizer experiment. The experiment included seven treatments: organic manure, half organic manure N plus half fertilizer N, fertilizer NPK, fertilizer NP, fertilizer NK, fertilizer PK, and the control (without fertilization). N fertilization greatly increased soil nitrification potential, and mineral N fertilizer had a greater impact than organic manure, while N deficiency treatment (PK) had no significant effect. AOB community structure was analyzed by PCR-denaturing gradient gel electrophoresis (PCR-DGGE) of the amoA gene, which encodes the \uffce\uffb1 subunit of ammonia monooxygenase. DGGE profiles showed that the AOB community was more diverse in N-fertilized treatments than in the PK-fertilized treatment or the control, while one dominant band observed in the control could not be detected in any of the fertilized treatments. Phylogenetic analysis showed that the DGGE bands derived from N-fertilized treatments belonged to Nitrosospira cluster 3, indicating that N fertilization resulted in the dominance of Nitrosospira cluster 3 in soil. These results demonstrate that long-term application of N fertilizers could result in increased soil nitrification potential and the AOB community shifts in soil. Our results also showed the different effects of mineral fertilizer N versus organic manure N; the effects of P and K on the soil AOB community; and the importance of balanced fertilization with N, P, and K in promoting nitrification functions in arable soils.
", "keywords": ["2. Zero hunger", "Minerals", "Bacteria", "Nitrogen", "Molecular Sequence Data", "Sequence Analysis", " DNA", "04 agricultural and veterinary sciences", "6. Clean water", "Manure", "Ammonia", "0401 agriculture", " forestry", " and fisheries", "Fertilizers", "Oxidoreductases", "Ecosystem", "Gammaproteobacteria", "Phylogeny", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1128/aem.01536-06"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Applied%20and%20Environmental%20Microbiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1128/aem.01536-06", "name": "item", "description": "10.1128/aem.01536-06", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1128/aem.01536-06"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-15T00:00:00Z"}}, {"id": "10.1371/journal.pone.0032054", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:20:51Z", "type": "Journal Article", "created": "2012-03-06", "title": "The Accumulation Of Organic Carbon In Mineral Soils By Afforestation Of Abandoned Farmland", "description": "The afforestation of abandoned farmland significantly influences soil organic carbon (OC). However, the dynamics between OC inputs after afforestation and the original OC are not well understood. To learn more about soil OC dynamics after afforestation of farmland, we measured the soil OC content in paired forest and farmland plots in Shaanxi Province, China. The forest plots had been established on farmland 18, 24, 48, 100, and 200 yr previously. The natural (13)C abundance of soil organic matter was also analyzed to distinguish between crop- and forest-derived C in the afforested soils. We observed a nonlinear accumulation of total OC in the 0-80 cm depth of the mineral soil across time. Total soil OC accumulated more rapidly under forest stands aged 18 to 48 yr than under forest stands aged 100 or 200 yrs. The rate of OC accumulation was also greater in the 0-10 cm depth than in the 10-80 cm depth. Forest-derived OC in afforested soils also accumulated nonlinearly across time, with the greatest increase in the 0-20 cm depth. Forest-derived OC in afforest soils accounted for 52-86% of the total OC in the 0-10 cm depth, 36-61% of the total OC in the 10-20 cm depth, and 11-50% of the total OC in the 20-80 cm depth. Crop-derived OC concentrations in the 0-20 cm depth decreased slightly after afforestation, but there was no change in crop-derived OC concentrations in the 20-80 cm depth. The results of our study support the claim that afforestation of farmland can sequester atmospheric CO(2) by increasing soil OC stocks. Changes in the OC stocks of mineral soils after afforestation appear to be influenced mainly by the input of forest-derived C rather than by the loss of original OC.", "keywords": ["Crops", " Agricultural", "2. Zero hunger", "China", "Minerals", "Science", "Q", "R", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "Trees", "Soil", "Medicine", "Humans", "0401 agriculture", " forestry", " and fisheries", "Organic Chemicals", "Research Article"], "contacts": [{"organization": "Xingchang Zhang, William J. Gale, Mingan Shao, Xiaorong Wei, Liping Qiu,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1371/journal.pone.0032054"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PLoS%20ONE", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1371/journal.pone.0032054", "name": "item", "description": "10.1371/journal.pone.0032054", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1371/journal.pone.0032054"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-03-06T00:00:00Z"}}, {"id": "10.1371/journal.pone.0092985", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:20:52Z", "type": "Journal Article", "created": "2014-03-25", "title": "Comparison Of Seasonal Soil Microbial Process In Snow-Covered Temperate Ecosystems Of Northern China", "description": "Open AccessMore than half of the earth's terrestrial surface currently experiences seasonal snow cover and soil frost. Winter compositional and functional investigations in soil microbial community are frequently conducted in alpine tundra and boreal forest ecosystems. However, little information on winter microbial biogeochemistry is known from seasonally snow-covered temperate ecosystems. As decomposer microbes may differ in their ability/strategy to efficiently use soil organic carbon (SOC) within different phases of the year, understanding seasonal microbial process will increase our knowledge of biogeochemical cycling from the aspect of decomposition rates and corresponding nutrient dynamics. In this study, we measured soil microbial biomass, community composition and potential SOC mineralization rates in winter and summer, from six temperate ecosystems in northern China. Our results showed a clear pattern of increased microbial biomass C to nitrogen (N) ratio in most winter soils. Concurrently, a shift in soil microbial community composition occurred with higher fungal to bacterial biomass ratio and gram negative (G-) to gram positive (G+) bacterial biomass ratio in winter than in summer. Furthermore, potential SOC mineralization rate was higher in winter than in summer. Our study demonstrated a distinct transition of microbial community structure and function from winter to summer in temperate snow-covered ecosystems. Microbial N immobilization in winter may not be the major contributor for plant growth in the following spring.", "keywords": ["Biomass (ecology)", "Atmospheric Science", "Microbial population biology", "Decomposer", "Nutrient cycle", "Physical Phenomena", "Agricultural and Biological Sciences", "Soil", "Terrestrial ecosystem", "Snow", "Soil water", "Biomass", "Phospholipids", "Soil Microbiology", "Minerals", "Glucan 1", "4-beta-Glucosidase", "Ecology", "Geography", "Mineralization (soil science)", "Q", "R", "Life Sciences", "04 agricultural and veterinary sciences", "Biogeochemistry", "16. Peace & justice", "Earth and Planetary Sciences", "Physical Sciences", "Medicine", "Seasons", "Ecosystem Functioning", "Research Article", "China", "Nitrogen", "Science", "Soil Science", "Biogeochemical cycle", "Environmental science", "Meteorology", "Genetics", "Arctic Permafrost Dynamics and Climate Change", "Tundra", "Biology", "Ecosystem", "Soil science", "Bacteria", "Fungi", "Microbial Diversity in Antarctic Ecosystems", "15. Life on land", "Carbon", "Temperate climate", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems"], "contacts": [{"organization": "Xinyue Zhang, Wei Wang, Weile Chen, Naili Zhang, Hui Zeng,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1371/journal.pone.0092985"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PLoS%20ONE", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1371/journal.pone.0092985", "name": "item", "description": "10.1371/journal.pone.0092985", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1371/journal.pone.0092985"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-03-25T00:00:00Z"}}, {"id": "10.1594/pangaea.960025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:21:12Z", "type": "Dataset", "title": "Analysis of the high density coarse fraction (HDC) from the nearshore zone of Herschel Island (Yukon, Canada)", "keywords": ["14C AMS", "MICADAS accelerator mass spectrometer AMS", "Elemental analyzer (EA)", " Thermo Scientific", " FlashEA 1112", "Fraction modern carbon", "Permafrost", "Quantachrome", "Age", " dated", "Surface area analyzer", " Quantachrome", " Nova 4200e; 6-point Brunauer\u2013Emmett\u2013Teller (BET) method according to Brunauer et al. (1938)", "Arctic", "Elemental analyzer EA", "Isotope ratio mass spectrometry-elemental analyzer (IRMS-EA)", " Thermo Finnigan", " Delta XP; Elemental analyzer (EA)", " Thermo Scientific", " FlashEA 1112", "Thermo Scientific", "Calculated", "Carbon Nitrogen ratio", "Carbon", " organic", " loading", "total", "Laboratory code label", "Minerals", "Multiple investigations", "Laboratory code/label", "Ionplus according to McIntyre et al 2017 and Haghipour et al 2018", "Minerals", " surface area", "error", "loading", "Nitrogen", " total", "Earth System Research", "\u03b413C", "FlashEA 1112", "Isotope ratio mass spectrometry elemental analyzer IRMS EA", "Nitrogen", "organic", "\u039414C", "MICADAS accelerator mass spectrometer (AMS)", " Ionplus; according to McIntyre et al. (2017) and Haghipour et al. (2018)", "Surface area analyzer", "dated", "Age", "Delta XP Elemental analyzer EA", "Organic carbon", "Comment", "surface area", "Carbon", "Carbon/Nitrogen ratio", "relative", "Thermo Finnigan", "sediment", "Sample ID", "Age", " 14C AMS", "Biomarkers", "Nova 4200e 6 point Brunauer Emmett Teller BET method according to Brunauer et al 1938", "Carbon", " organic", " total", "Fraction modern carbon", " error", " relative"]}, "links": [{"href": "https://doi.org/10.1594/pangaea.960025"}, {"rel": "self", "type": "application/geo+json", "title": "10.1594/pangaea.960025", "name": "item", "description": "10.1594/pangaea.960025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1594/pangaea.960025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-01-01T00:00:00Z"}}, {"id": "10.2134/jeq2006.0501", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:21:38Z", "type": "Journal Article", "created": "2007-10-17", "title": "Methane Oxidation In An Intensively Cropped Tropical Rice Field Soil Under Long-Term Application Of Organic And Mineral Fertilizers", "description": "AbstractMethane (CH4) oxidation is the only known biological sink process for mitigating atmospheric and terrestrial emissions of CH4, a major greenhouse gas. Methane oxidation in an alluvial soil planted to rice (Oryza sativaL.) under long\uffe2\uff80\uff90term application of organic (compost with a C/N ratio of 21.71), and mineral fertilizers was measured in a field\uffe2\uff80\uff90cum\uffe2\uff80\uff90laboratory incubation study. Oxidation rates were quantified in terms of decrease in the concentration of CH4in the headspace of incubation vessels and expressed as half\uffe2\uff80\uff90life (t\uffc2\uffbd) values. Methane oxidation rates significantly differed among the treatments and growth stages of the rice crop. Methane oxidation rates were high at the maximum tillering and maturity stages, whereas they were low at grain\uffe2\uff80\uff90filling stage. Methane oxidation was low (t\uffc2\uffbd= 15.76 d) when provided with low concentration of CH4On the contrary, high concentration of CH4resulted in faster oxidation (t\uffc2\uffbd= 6.67 d), suggesting the predominance of \uffe2\uff80\uff9clow affinity oxidation\uffe2\uff80\uff9d in rice fields. Methane oxidation was stimulated following the application of mineral fertilizers or compost implicating nutrient limitation as one of the factors affecting the process. Combined application of compost and mineral fertilizer, however, inhibited CH4oxidation probably due to N immobilization by the added compost. The positive effect of mineral fertilizer on CH4oxidation rate was evident only at high CH4concentration (t\uffc2\uffbd= 4.80 d), while at low CH4concentration their was considerable suppression (t\uffc2\uffbd= 17.60 d). Further research may reveal that long\uffe2\uff80\uff90term application of fertilizers, organic or inorganic, may not inhibit CH4oxidation.
", "keywords": ["Crops", " Agricultural", "2. Zero hunger", "Minerals", "Tropical Climate", "Time Factors", "Chemical Phenomena", "Chemistry", " Physical", "Oryza", "04 agricultural and veterinary sciences", "Hydrogen-Ion Concentration", "15. Life on land", "01 natural sciences", "6. Clean water", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Food", " Organic", "Fertilizers", "Oxidoreductases", "Methane", "Oxidation-Reduction", "Soil Microbiology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.2134/jeq2006.0501"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Quality", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2134/jeq2006.0501", "name": "item", "description": "10.2134/jeq2006.0501", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2134/jeq2006.0501"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-11-01T00:00:00Z"}}, {"id": "10.2134/jeq2011.0100", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:21:40Z", "type": "Journal Article", "created": "2012-06-29", "title": "Switchgrass Biochar Affects Two Aridisols", "description": "The use of biochar has received growing attention because of its ability to improve the physicochemical properties of highly weathered Ultisols and Oxisols, yet very little research has focused on its effects in Aridisols. We investigated the effect of low or high temperature (250 or 500\u00b0C) pyrolyzed switchgrass () biochar on two Aridisols. In a pot study, biochar was added at 2% w/w to a Declo loam (Xeric Haplocalcids) or to a Warden very fine sandy loam (Xeric Haplocambids) and incubated at 15% moisture content (by weight) for 127 d; a control (no biochar) was also included. Soils were leached with 1.2 to 1.3 pore volumes of deionized HO on Days 34, 62, 92, and 127, and cumulative leachate Ca, K, Mg, Na, P, Cu, Fe, Mn, Ni, Zn, NO-N, NO-N, and NH-N concentrations were quantified. On termination of the incubation, soils were destructively sampled for extractable Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Zn, NO-N, and NH-N, total C, inorganic C, organic C, and pH. Compared with 250\u00b0C, the 500\u00b0C pyrolysis temperature resulted in greater biochar surface area, elevated pH, higher ash content, and minimal total surface charge. For both soils, leachate Ca and Mg decreased with the 250\u00b0C switchgrass biochar, likely due to binding by biochar's functional group sites. Both biochars caused an increase in leachate K, whereas the 500\u00b0C biochar increased leachate P. Both biochars reduced leachate NO-N concentrations compared with the control; however, the 250\u00b0C biochar reduced NO-N concentrations to the greatest extent. Easily degradable C, associated with the 250\u00b0C biochar's structural make-up, likely stimulated microbial growth, which caused NO-N immobilization. Soil-extractable K, P, and NO-N followed a pattern similar to the leachate observations. Total soil C content increases were linked to an increase in organic C from the biochars. Cumulative results suggest that the use of switchgrass biochar prepared at 250\u00b0C could improve environmental quality in calcareous soil systems by reducing nutrient leaching potential.", "keywords": ["Minerals", "Soil", "Charcoal", "500", "Water", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Panicum", "01 natural sciences", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.2134/jeq2011.0100"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Quality", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2134/jeq2011.0100", "name": "item", "description": "10.2134/jeq2011.0100", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2134/jeq2011.0100"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-07-01T00:00:00Z"}}, {"id": "10.2139/ssrn.4106102", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:21:56Z", "type": "Journal Article", "created": "2022-05-28", "title": "Evaluation of Biostimulation, Bioaugmentation, and Organic Amendments Application on the Bioremediation of Recalcitrant Hydrocarbons of Soil", "description": "In the present work, the operational conditions for improving the degradation rates of Total Petroleum Hydrocarbons (TPHs) in contaminated soil from a machinery park were optimized at a microcosms scale along a 90- days incubation period. In this study, bioremediation strategies and an organic amendment have been tested to verify the remediation of soil contaminated with different hydrocarbons, mineral oils, and heavy metals. Specifically, designed biostimulation and bioaugmentation strategies were compared with and without adding vermicompost. The polluted soil harboring multiple contaminants, partially attenuated for years, was used. The initial profile showed enrichment in heavy linear alkanes, suggesting a previous moderate weathering. The application of vermicompost increased five and two times the amounts of available phosphorus (P) and exchangeable potassium (K), respectively, as a direct consequence of the organic amendment addition. The microbial activity increased due to soil acidification, which influenced the solubility of P and other micronutrients. It also impacted the predominance and variability of the different microbial groups and the incubation, as reflected by phospholipid fatty acid (PLFA) results. An increase in the alkaline phosphatases and proteases linked to bacterial growth was displayed. This stimulation of microbial metabolism correlated with the degradation rates since TPHs degradation\u2019 efficiency after vermicompost addition reached 32.5% and 34.4% of the initial hydrocarbon levels for biostimulation and bioaugmentation, respectively. Although Polycyclic Aromatic", "keywords": ["Soil enzymes", "01 natural sciences", "Total petroleum hydrocarbons polluted soils", "Soil", "Bioaugmentation", "Alkanes", "Soil Pollutants", "Micronutrients", "Polycyclic Aromatic Hydrocarbons", "Materials", "Phospholipids", "Soil Microbiology", "0105 earth and related environmental sciences", "2. Zero hunger", "Minerals", "Materiales", "Biostimulation", " Bioaugmentation", " Phospholipid fatty acids", " Total petroleum hydrocarbons polluted soils", " Soil enzymes", "Fatty Acids", "Phosphorus", "Phenanthrenes", "Hydrocarbons", "Phosphoric Monoester Hydrolases", "6. Clean water", "Biostimulation", "Biodegradation", " Environmental", "Petroleum", "13. Climate action", "Phospholipid fatty acids", "Potassium", "Oils", "Biostimulation Bioaugmentation Phospholipid fatty acids Total petroleum hydrocarbons polluted soils Soil enzymes", "Peptide Hydrolases"]}, "links": [{"href": "https://doi.org/10.2139/ssrn.4106102"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/SSRN%20Electronic%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2139/ssrn.4106102", "name": "item", "description": "10.2139/ssrn.4106102", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2139/ssrn.4106102"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-01T00:00:00Z"}}, {"id": "10.3929/ethz-b-000640921", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:22:57Z", "type": "Journal Article", "title": "Mineral transformations of ferrihydrite and lepidocrocite in suspension and in paddy soil: A closer look at the effects of silicate, phosphate, and the soil matrix", "description": "unspecifiedIron (Fe) (oxyhydr)oxides, such as ferrihydrite and lepidocrocite, are ubiquitous in soils. Due to their high surface area, Fe (oxyhydr)oxides constitute important sorbents for nutrients and contaminants in the soil, including silicate and phosphate. Under sub- or anoxic conditions in water-saturated or submerged soils, Fe(III) acts as an alternative electron acceptor during the microbial metabolization of organic matter. This leads to the reductive dissolution of Fe (oxyhydr)oxides, the formation of Fe(II) and the potential release of adsorbed components. The presence of Fe(II) accelerates the transformation of ferrihydrite and lepidocrocite to more crystalline Fe minerals, such as goethite or magnetite. Silicate and phosphate can interfere with these mineral transformations. However, how silicate and phosphate impact the trajectory and mineral products of ferrihydrite and lepidocrocite transformation has not been fully resolved yet. Up to now, Fe mineral transformations have mainly been studied in simplified model systems, such as mineral suspensions, but rarely in soil. Further, transformations of ferrihydrite and lepidocrocite in soils during redox cycles, including the recurring reduction and oxidation of Fe, remain obscure. Redox active soils include paddy soils which are crucial for the global production of rice as a staple food. This thesis investigated factors that govern Fe (oxyhydr)oxide transformations in redox active paddy soils. The doctoral project was designed to move consecutively from controlled laboratory to in-situ field experiments. In all experiments, the stable isotope 57Fe was used as a tracer in combination with isotope analysis of dissolved and solid phases and/or 57Fe M\u00f6ssbauer spectroscopy. In the first part of this thesis, the effect of silicate on Fe(II)-catalyzed transformation of ferrihydrite and lepidocrocite was examined in mineral suspensions spiked with 57Fe(II) at two Fe(II):Fe(III) molar ratios. The reactivity of ferrihydrite towards 57Fe(II) adsorption and Fe atom exchange with dissolved 57Fe(II) was only marginally impacted by coprecipitated silicate. Silicate hindered ferrihydrite transformation to goethite and magnetite as compared to silicate-free ferrihydrite. During mineral transformation, coprecipitated silicate led to the formation of thicker lepidocrocite crystallites from ferrihydrite and silicate was redistributed in the solid phase. For lepidocrocite, magnetite formed at the higher Fe(II):Fe(III) molar ratio. This contrasts the decreased Fe atom exchange and inhibited mineral transformation in the presence of surface-adsorbed silicate on lepidocrocite surfaces. The results demonstrate that silicate strongly interferes with Fe mineral transformations whereas the mineral reactivity towards Fe(II) adsorption and Fe atom exchange can remain high. In a following experiment, the transformation of ferrihydrite and lepidocrocite during three redox cycles was studied in laboratory mesocosms filled with paddy soil. To understand the effect of the soil matrix on mineral transformations, minerals were incubated either as minerals without the addition of soil or as 57Fe-labeled mineral-soil mixes in mesh bags. The results showed that ferrihydrite and lepidocrocite transformed to goethite and/or magnetite when incubated as mineral mesh bags without soil. When ferrihydrite and lepidocrocite were mixed with soil, a mixed valent and highly disordered Fe phase formed. Goethite additionally formed in lepidocrocite-soil mixes. Throughout repeated redox cycles, solid-associated Fe(II) fractions in mineral-soil mixes during anoxic periods increased, suggesting an increasing extent of Fe mineral reduction. The outcomes of this study showed that Fe mineral transformations are strongly impacted when minerals are exposed to the soil matrix, which can lead to highly disordered instead of crystalline Fe mineral transformation products. In a final experiment, the in-situ transformation of Fe oxyhydroxides and the effect of phosphate were investigated in a field-incubation of minerals in a flooded rice paddy soil in Thailand. Ferrihydrite, lepidocrocite and phosphate-adsorbed ferrihydrite were incubated using mesh bags, containing the minerals without soil or 57Fe-labeled mineral-soil mixes. The field-incubation of ferrihydrite and lepidocrocite in mineral mesh bags without soil resulted in goethite formation with a much larger transformation extent in ferrihydrite. With pre-adsorbed phosphate, the transformation of ferrihydrite was strongly hindered. In mineral-soil mixes ferrihydrite and lepidocrocite transformed to goethite to a similar extent. Pre-adsorbed phosphate on ferrihydrite surfaces strongly hindered mineral transformation in the mineral-soil mixes but enhanced Fe reduction compared to phosphate-free ferrihydrite. These findings demonstrate the dual role of phosphate during mineral transformations when minerals are closely associated or in direct contact with the soil matrix. The outcomes of this thesis highlight the importance of considering silicate and phosphate interactions with Fe (oxyhydr)oxides, by demonstrating their strong impact on the trajectory of mineral transformations. Mineral transformations in soil have been shown in this thesis to be much slower compared to mineral suspension experiments. Further, when minerals are closely associated or in direct contact with the soil matrix, highly disordered Fe phases can form instead of crystalline Fe minerals. Such disordered Fe phases can be highly reactive, as this work demonstrated for the exposure to redox cycles. Collectively, the gained insights contribute to a better assessment of Fe cycling in redox-active soils which can control nutrient and contaminant mobility in the environment.", "keywords": ["Transformations", "Field study", "iron reduction", "15. Life on land", "laboratory study", "6. Clean water", "Lepidocrocite", "Natural sciences", "Ferrihydrite", "Rice paddy", "Redox reactions", "iron minerals", "FOS: Natural sciences", "info:eu-repo/classification/ddc/500"], "contacts": [{"organization": "Schulz, Katrin", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.3929/ethz-b-000640921"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Thesis/Dissertation", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3929/ethz-b-000640921", "name": "item", "description": "10.3929/ethz-b-000640921", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3929/ethz-b-000640921"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-01T00:00:00Z"}}, {"id": "10.3929/ethz-b-000648810", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:22:57Z", "type": "Journal Article", "title": "Transformation of jarosite and iron oxyhydroxides in acid sulfate paddy soils", "description": "Open AccessMinerals containing Fe are ubiquitous in soils. By providing an abundance of sites for the sorption and incorporation of major and trace elements, Fe minerals can govern the fate and behaviour of numerous pollutants and nutrients in soils. Furthermore, the reactivity of Fe in redox-dynamic soils produces a web of Fe mineral transformation processes with broad consequences for element cycling. The importance of Fe cycling is no exception in acid sulfate soils, although the high sulfur and low pH conditions produce unique Fe mineral transformation processes and compositions. In acid sulfate soils, jarosite, an Fe-K hydroxysulfate mineral, and ferrihydrite, a common short-range-ordered Fe oxyhydroxide mineral, play a central role in the pedological development of active and post-active acid sulfate soils. Soil pH and the dynamics of metals, such as aluminium, are key to understanding the toxicity of acid sulfate soils and can be directly influenced by jarosite and ferrihydrite transformation processes. Although the transformation of Fe minerals is a key component of biogeochemical processes in redox-active soils, the variables that control the rates and pathways of Fe mineral transformations in soil remain uncertain. The uncertainty arises from the difficulty of tracing molecular processes within a matrix of diverse soil components. Iron minerals are regularly characterised in soils, but the processes that explain the Fe mineral composition of soils cannot be easily resolved. An alternative approach is to perform simplified experiments, such as mixed mineral suspension experiments, under controlled laboratory conditions, to test the effect of individual variables. These systems often use synthetic minerals, although relatively pure jarosite may also be isolated from soils and tested in mixed suspension experiments. While useful to derive mechanistic understanding, the measured outcomes of mixed suspension experiments may not represent the rates and products of transformations that occur in soils. Therefore, the objective of this thesis was to gain new understanding of the stability and transformation of jarosite and ferrihydrite in acid sulfate soils by developing novel experimental techniques to follow the transformation of synthetic jarosite and ferrihydrite directly in soils. The central theme of the thesis is the comparison of jarosite and aluminium-substituted jarosite transformation in experimental media of increasing complexity. The experiments are performed under conditions that are relevant to rice paddy soils because of the importance of rice in global food production, and the unique management of rice paddies whereby regular flooding during the growing season produces distinct redox cycles. In Thailand, large areas of the Chao Phraya River delta are cultivated as rice paddies despite being acid sulfate soils, providing a suitable site to observe the effects of regular redox cycling on the biogeochemistry of Fe minerals in acid sulfate soils. The thesis begins with characterisation of synthetic and natural jarosite mineral composition and reactivity. Spectroscopic techniques (Raman spectroscopy, M\u00f6ssbauer spectroscopy and Energy-dispersive X-ray spectrometry) and X-ray diffraction (XRD) were used to assess the element substitution of mineral samples from two jarosite-alunite synthetic solid solution series. The same characterisation techniques were then applied to a sample of jarosite from an acid sulfate soil in Thailand has a natural Al-for-Fe substitution. The mineral characterisation was followed by a transformation experiment in a mixed-suspension system, similar to experimental designs that have been previously used to study mineral transformation processes. The experiment followed the transformation of the natural jarosite sample from an acid sulfate soil in Thailand and three jarosite samples with variable amounts of Al substitution. The reaction solution mimicked the pH (circumneutral) and Fe(II) content (up to 1:1 ratio of Fe(II) in solution to Fe(III) in solids) of flooded acid sulfate soils. Furthermore, using a 57Fe tracer, the simultaneous transformation processes that explained the distribution of mineral products could be resolved from one another. The transformation experiment revealed the relative reactivity of the minerals in the presence of Fe(II), and created a baseline that could be used to compare traditional mixed-suspension experiments with transformations in complex media such as soil. To advance mineral transformation experiments towards studies in which transformation processes may be followed within a soil matrix, several novel techniques were developed. In a first step, ferrihydrite was incubated for up to twelve weeks in microcosms, each containing 300 g of 5 mM CaCl2 solution and 250 g of one of five paddy soils. The ferrihydrite was buried in the soil within a mesh bag (polyethel terephthalate, 51 \u03bcm pores, 30 mm x 12 mm x 3 mm) that allowed free contact between the synthetic minerals and the pore water, but separated the minerals from direct contact with the soil matrix. The mineral products of the transformation were identified and quantified by Rietveld fitting of XRD patterns. Further, the spatial arrangements of the ferrihydrite and transformation products were measured after two weeks by Raman spectroscopy, which could be used to assess the effects of pore water chemistry and diffusion processes on mineral transformation in the mesh bags. The second step involved measuring jarosite and Al-substituted jarosite transformation in flooded topsoil and subsoils from a rice paddy located on the Bangkok Plain in Central Thailand using an adaptation of the mesh bag method. To test the effect of pore water on the transformation of jarosite in soil, mesh bags were filled with synthetic jarosite and aluminium-jarosite and incubated in topsoils and subsoils, both in laboratory mesocosms and directly in the field. Then, the effect of the soil matrix was tested by completing a parallel experiment using mesh bags containing soil that was pre-enriched with synthetic 57Fe-labelled jarosite and aluminium-substituted jarosite. To facilitate the deployment and collection of small mesh bags in large soil volumes, the mesh bags were inserted into soils using custom-designed 3D-printed sample holders. At three timepoints within twelve weeks, one set of mesh bags were removed from the soil. Transformation products were identified and quantified in the pure jarosite and aluminium-jarosite mesh bags using Rietveld fitting of XRD patterns, while the fate of the 57Fe in enriched soil mesh bags was traced using 57Fe M\u00f6ssbauer spectroscopy. Performing experiments in increasingly complex media provides an insight into the effect of experimental design on the observation of Fe mineral transformations and provides new information regarding the transformation rates and pathways of jarosite and ferrihydrite within full complexity of soil media. Indeed, this thesis demonstrates that the complex chemistry, biological activity, and physical arrangement of components in the soil have strong effects on the rate and products of jarosite and ferrihydrite transformation processes. The transformation of jarosite and Al-substituted jarosite in mixed-suspension experiments presented in this thesis, in agreement with previous mixed-suspension experiments on both jarosite and ferrihydrite, occurred within a matter of hours. By contrast, the rate of ferrihydrite, jarosite and Al-jarosite transformation in soil pore and in direct contact with the soil matrix occurred over the course of several weeks or months. In the ferrihydrite mesh bags, slow ferrihydrite transformation kinetics on the outer rim of the mesh bag, and deep in the core of the mesh bag, indicated that the sorption of chemical components of soil pore water and diffusion limitations of Fe(II) in pore water could be reasons for the slower rates of transformation in soil. In addition, both Al-for-Fe substitution and Fe(II) concentration in solution were important factors that altered the rate of mineral transformation. The different incubation conditions for jarosite and Al-jarosite also altered the products of the transformation. Whereas the hydrolysis of jarosite in the absence of Fe(II) resulted primarily in the formation of ferrihydrite, jarosite transformation in the presence of Fe(II) led to ferrihydrite, goethite and lepidocrocite formation. The Fe oxyhydroxide products were consistent with Fe(II)-catalysed transformation, and Fe(II)-catalysed recrystallisation of jarosite may have occurred concurrently. Aluminium-for-iron substitution hindered the formation of lepidocrocite formation in favour of ferrihydrite and goethite. Similar product phases occurred when jarosite and Al-jarosite were reacted with pore water from acid sulfate soils, indicating that similar transformation pathways may define the mineral products of jarosite transformations when the jarosite occurs as accumulations of pure mineral in soil. However, non- or poorly crystalline phases predominated in the transformation products when jarosite or Al-jarosite were incubated in direct contact with the soil matrix, indicating that the transformation of jarosite under these circumstances was governed by different pathways and processes. The new insights into the transformation of ferrihydrite, jarosite and Al-jarosite in acid sulfate soils demonstrate that phases previously considered meta-stable may participate in the biogeochemistry of soil over period of several months. In the context of rice cultivation, the transformation processes may affect the biogeochemistry of the soils throughout the growing season. The formation of poorly crystalline minerals following the transformation in flooded soils may have positive consequences on the sequestration of other trace and major elements that were associated with the ferrihydrite, jarosite or Al-jarosite prior to the transformation. However, the stabilisation of reduced Fe in the soil matrix may have the opposite effect, promoting the mobility of other ions in solution. The methods used to incubate jarosite and ferrihydrite in soils are easily adaptable to new experimental questions involving the behaviour of Fe-bearing minerals in soil. Therefore, the findings open up a new class of experiments within environmental mineralogy and biogeochemistry, that can help to uncover the processes that occur in the environment and explain the natural variation in the composition of Fe phases in soil.", "keywords": ["jarosite", "iron biogeochemistry", "soil chemistry", "acid sulfate soil", "laboratory study", "ferrihydrite", "soil", "soil incubation", "redox chemistry", "goethite", "iron minerals", "2. Zero hunger", "soil biogeochemistry", "info:eu-repo/classification/ddc/550", "M\u00f6ssbauer spectroscopy", "rice paddy soil", "15. Life on land", "6. Clean water", "Earth sciences", "lepidocrocite", "field study", "13. Climate action", "Raman spectroscopy", "iron oxyhydroxide", "mineral transformation", "iron minerals; mineral transformation; soil; soil chemistry; soil mineralogy; soil biogeochemistry; redox chemistry; iron biogeochemistry; acid sulfate soil; rice paddy soil; jarosite; ferrihydrite; goethite; lepidocrocite; iron oxyhydroxide; M\u00f6ssbauer spectroscopy; Raman spectroscopy; field study; laboratory study; soil incubation", "soil mineralogy"], "contacts": [{"organization": "Grigg, Andrew R.C.", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.3929/ethz-b-000648810"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Thesis/Dissertation", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3929/ethz-b-000648810", "name": "item", "description": "10.3929/ethz-b-000648810", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3929/ethz-b-000648810"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-01T00:00:00Z"}}, {"id": "10.3929/ethz-b-000663192", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:22:57Z", "type": "Journal Article", "title": "Vivianite formation and transformation processes in intertidal sediments and the influence of isomorphic substitution", "description": "unspecifiedPhosphor (P) ist ein wesentlicher N\u00e4hrstoff f\u00fcr die Prim\u00e4rproduktion in aqautischen \u00d6kosystemen, aber \u00fcberm\u00e4\u00dfiger P Eintrag kann zur Eutrophierung dieser \u00d6kosysteme f\u00fchren. Wie P in Sedimenten gebunden ist, wirkt sich auf dessen Bioverf\u00fcgbarkeit aus. Unter reduzierenden, sulfid-freien Bedingungen kann das eisenhaltige Phosphatmineral Vivianit eine wesentliche Rolle bei der P-Bindung in K\u00fcstensedimenten spielen und somit die Wasserqualit\u00e4t positiv beeinflussen. Trotz der Bedeutung von Vivianit f\u00fcr die Regulierung der P-Verf\u00fcgbarkeit in K\u00fcstensedimenten sind die in-situ Bildung, Zusammensetzung und Stabilit\u00e4t von Vivianit nur unzureichend untersucht. In dieser Doktorarbeit wurden Feldexperimente mit einer Laborstudie kombiniert, um die Bildungs- und Umwandlungsprozesse von Vivianit in gezeitenbeeinflussten Sedimenten und den Einfluss der isomorphen Substitution auf diese Prozesse aufzudecken. Diese Erkenntnisse bieten wertvolle Einblicke in die Prozesse des P-Kreislaufs in K\u00fcstensedimenten und sind bedeutend f\u00fcr die Entwicklung industrieller Anwendungen, die darauf abzielen, den anthropogenen P-Kreislauf zu schlie\u00dfen. Im ersten Teil der Arbeit wurde eine Methode entwickelt, bei der isotopisch 57Fe-markiertes Ferrihydrit mit dem Sediment vermischt wurde, um die Vivianitbildung in-situ in gezeitenbeeinflussten Sedimenten zu verfolgen. Mit dieser Methode konnte gezeigt werden, dass sich Vivianit innerhalb von sieben Wochen in gezeitenbeeinflussten Sedimenten mit g\u00fcnstigen geochemischen Bedingungen bilden kann. Die Adsorption von Phosphat an Ferrihydrit war ein wesentlicher Vorl\u00e4ufer f\u00fcr die Bildung von Vivianit. Die reduktive Aufl\u00f6sung des Ferrihydrits bildete wahrscheinlich lokale Bedingen, welche n\u00f6tig waren, um die Vivianitbildung auszul\u00f6sen. W\u00e4hrend das gebildete Vivianit nur ein kleiner Teil des Eisen (Fe)-Pools war (bis zu 15%), machte es bis zu 72% des P-Pools aus basierend auf st\u00f6chiometrischen Berechnungen. Diese Ergebnisse zeigen, dass Vivianit eine entscheidende Rolle bei der Regulierung der P-Retention in K\u00fcstensedimenten spielen kann. In der Umwelt enth\u00e4lt Vivianit h\u00e4ufig andere zweiwertige Kationen, wie Mangan (Mn) und Magnesium (Mg), die in der Kristallstruktur Fe ersetzen. Im zweiten Experiment wurde untersucht, ob Mn oder Mg bei unterschiedlichen Salzgehalten bevorzugt eingebaut wird und wie die isomorphe Substitution die Kristallstruktur und Morphologie ver\u00e4ndert. Die Synthese von neunzehn Vivianiten mit unterschiedlichen Mn- und/oder Mg-Konzentrationen bei verschiedenen Salzgehalten ergab, dass bei niedriger Ionenst\u00e4rke sowohl Mn als auch Mg Fe in der Kristallstruktur gleichwertig ersetzen k\u00f6nnen, wobei Mn bei h\u00f6herer Ionenst\u00e4rke bevorzugt wurde. Vivianit weist zwei unterschiedliche Fe-Atompositionen auf. Die Substitution von Fe durch Mn und/oder Mg fand vorzugsweise an der Atomposition statt, welche Elektronentransfer ausf\u00fchren kann, wodurch Vivianit gegen Oxidation stabilisiert wird. Somit kann sich die isomorphe Substitution wahrscheinlich direkt auf das Oxidationsverhalten von Vivianit auswirken. Au\u00dferdem f\u00fchrte die isomorphe Substitution zu kleineren, raueren Kristallen mit geringerer Kristallinit\u00e4t. Diese beobachteten Ver\u00e4nderungen k\u00f6nnten sich auf die Reaktivit\u00e4t von Vivianit in der Umwelt auswirken, weshalb die isomorphe Substitution bei der Untersuchung der Reaktivit\u00e4t von Vivianit ber\u00fccksichtigt werden sollte. Umweltver\u00e4nderungen, einschlie\u00dflich des Anstiegs des Meeresspiegels, k\u00f6nnten die Bildung von Sulfid in derzeit nicht sulfidischen Sedimenten, die Vivianit enthalten, verst\u00e4rken und zu thermodynamisch instabilen Bedingungen f\u00fcr Vivianit f\u00fchren. Das letzte Experiment untersuchte die in-situ Stabilit\u00e4t von unsubstituiertem und Mn-Mg-substituiertem Vivianit, gemischt mit Meeressand und mit oder ohne die Zugabe von Kalziumkarbonat. Die Mischungen wurden 56 Tage lang in zwei Gezeitenzonen inkubiert, von denen ein Standort eine niedrige und der andere eine hohe Sulfidkonzentration aufwies. Die Inkubation von unsubstituiertem und Mn-Mg-substituiertem Vivianit bei unterschiedlichen Sulfidkonzentrationen ergab eine teilweise Aufl\u00f6sung von Vivianit, die durch die isomorphe Substitution deutlich verst\u00e4rkt wurde. Der gr\u00f6\u00dfte Teil der verbleibenden Mineralphase wurde weiterhin als Vivianit charakterisiert, was darauf hindeutet, dass ein Teil des Vivianits \u00fcber die Versuchsdauer erhalten blieb. Bei niedrigen Sulfidkonzentrationen war Gr\u00fcner Rost das Hauptumwandlungsprodukt, das wahrscheinlich einen Teil des freigesetzten Phosphats adsorbierte. Bei hohem Sulfidgehalt dominierte die Bildung von Fe-Sulfidmineralen, welche aufgrund der geringen Sorptionskapazit\u00e4t f\u00fcr Phosphat zu einem erh\u00f6hten P-Verlust f\u00fchrte. Ein erh\u00f6htes Sorptionspotenzial f\u00fcr Phosphat durch die Zugabe von Kalziumkarbonat k\u00f6nnte den Phosphatverlust geringf\u00fcgig verringern. Diese Ergebnisse zeigen, dass vivianithaltige Sedimente als Quelle f\u00fcr bioverf\u00fcgbares Phosphat dienen k\u00f6nnen, wenn sich die geochemischen Bedingungen \u00e4ndern. Diese Arbeit liefert neue experimentelle Ans\u00e4tze zur Untersuchung und Quantifizierung von Umwandlungs- und Bildungsprozessen von Vivianit. Die Ergebnisse zeigen eine schnelle in-situ Bildungskinetik, w\u00e4hrend die Aufl\u00f6sung von Vivianit unter den untersuchten Bedingungen langsam verl\u00e4uft. Die schnelle in-situ Bildungskinetik deutet darauf hin, dass die Vivianitbildung die P-Retention in Umgebungen mit sowohl schwankenden als auch stabilen geochemischen Bedingungen regulieren kann. Die Ver\u00e4nderungen der Kristallstruktur und -morphologie durch isomorphe Substitution erh\u00f6hten das Ausma\u00df der Aufl\u00f6sung und Umwandlung des Vivianits. Aufgrund der langsamen in-situ Aufl\u00f6sung k\u00f6nnte Vivianit bei kurzfristigen Umweltst\u00f6rungen eine stabile P-Retentionsphase darstellen. Langfristig destabilisierende Bedingungen k\u00f6nnten jedoch zu einer vollst\u00e4ndigen Aufl\u00f6sung f\u00fchren und die P-Retentionskapazit\u00e4t des Sediments schw\u00e4chen. Die Ergebnisse unterstreichen die Bedeutung von Vivianit als P-Retentionsphase in salzarmen K\u00fcstensedimenten, k\u00f6nnten aber auch f\u00fcr das Verst\u00e4ndnis von Bildungs- und Umwandlungsprozessen von Vivianit in anderen Umweltsystemen, wie limnischen Sedimenten und B\u00f6den in Feuchtgebieten, von Bedeutung sein. Dar\u00fcber hinaus haben diese Ergebnisse Auswirkungen auf andere Forschungsbereiche, wie die Gew\u00e4ssersanierung und die industrielle P-R\u00fcckgewinnung.", "keywords": ["iron biogeochemistry", "info:eu-repo/classification/ddc/550", "Phosphorus cycling", "Coastal biogeochemistry", "X-ray absorption spectroscopy", "Laboratory experiments", "VIVIANITE (MINERALOGY)", "Field experiments", "6. Clean water", "M\u00f6ssbauer Spectroscopy", "Earth sciences", "X-Ray Diffraction", "13. Climate action", "IRON PHOSPHATES (INORGANIC CHEMISTRY)", "14. Life underwater", "iron minerals", "mineral transformation", "Redox geochemistry"], "contacts": [{"organization": "Kubeneck, Luisa Jo\u00eblle", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.3929/ethz-b-000663192"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Thesis/Dissertation", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3929/ethz-b-000663192", "name": "item", "description": "10.3929/ethz-b-000663192", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3929/ethz-b-000663192"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-01-01T00:00:00Z"}}, {"id": "10.5061/dryad.ht76hdrp8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:23:15Z", "type": "Dataset", "created": "2024-06-07", "title": "Total data for global pattern of organic carbon pools in forest soil", "description": "unspecified# Total _data [https://doi.org/10.5061/dryad.ht76hdrp8](https://doi.org/10.5061/dryad.ht76hdrp8) ## Description of the data and file structure Abbreviations and the units of the variables in the dataset (Total_data.xlsx) Filling these empty cells in the data file will interfere with a script used to analyze the data, it is necessary to leave these cells empty. MAT: mean annual temperature(C); MAP: mean annual precipitation(mm); PET: potential evapotranspiration; AI: Aridity Index,MAP/PET; Soil_order: USDA; NPP, gC/m\u00b2/year; Elevation: Altitude,(m); Forest type: Conifer, Broadleaf, mixed Tree; age, years Soil type: Soil order according to USDA; BD, bulk density,(g.cm-3); Sand,Silt,Clay, SC(Silt+Clay) (%); Fe,Al. Total Fe/Al,(g\u00b7kg-1soil); Fed. Ald: free Fe and Al oxides.(g kg-1soil); dithionite extractable Fe; Feo, Alo: amorphous Fe and Al oxides (g\u00b7kg-1soil); oxalate extractable Fe and Al; Fed-Feo: crystalline iron (Fed-Feo); Fep,Alp:organically-complexed Fe and Al (gkg-1soil), pyrophosphate extractable Fe and Al; CEC.Cation exchange capacity (cmol kg-1 Soil) pH; O-C/N/P, Organic layer,(g kg-1); SOC,TN,TP,(g-kg-1); CN,ratio of SOC to TN; POC, MOC(gkg-1soil); MOC/SOC (%); POCf, MOCf(gkg-1 fraction) DOC,(mg kg-1); LOC, Labile organic C,g/kg soil; ROC, recalcitrant organic C.g/kg soil; SOCt, measured values from various depth at < 30 cm down to 30 cm by using regression equations of the total SOC content with soil depth as described in Hansen et al. (2023); Soil depth, topsoil, (cm), TBF:Temperate broadleaf forests;TCF:Temperate conifer forests;TMF:Temperate mixed conifer-broadleaf forests SBF:Subtropical broadleaf forests;SCF:Subtropical conifer forests;SMF:Subtropical mixed conifer-broadleaf forests TrBF:Temperate broadleaf forests; MBF:Mediterranean broadleaf forests;MCF:Mediterranean conifer forests;MMF:Mediterranean mixed conifer-broadleaf for AGBC,The plant aboveground standing biomass C,Mg Cha-1; BGBC,belowground standing biomass C,Mg C ha-1 NPP,gC/m2/year normalised difference vegetation index (NDVI) enhanced vegetationindex (EVD). ## Code/Software All statistical analyses were performed in R 4.2.3 software (R Development Core Team, 2022) the R codes (R_code.txt) used to generate the results and figures reported in this study are available in supplementary materials of the paper.", "keywords": ["carbon pools", "clay minerals", "climate and vegetation effects", "FOS: Biological sciences", "soil organic matter", "forest ecosystems"], "contacts": [{"organization": "Zhang, Yuxue, Guo, Xiaowei, Chen, Longxue, Kuzyakov, Yakov, Wang, Ruzhen, Zhang, Haiyang, Han, Xingguo, Jiang, Yong, Sun, Osbert,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.ht76hdrp8"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.ht76hdrp8", "name": "item", "description": "10.5061/dryad.ht76hdrp8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.ht76hdrp8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-06-22T00:00:00Z"}}, {"id": "10.5194/acp-2022-742", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:23:22Z", "type": "Journal Article", "created": "2022-11-07", "title": "Insights into the single particle composition, size, mixing state and aspect ratio of freshly emitted mineral dust from field measurements in the Moroccan Sahara using electron microscopy", "description": "Abstract. The chemical and morphological properties of mineral dust aerosols emitted by wind erosion from arid and semi-arid regions influence climate, ocean and land ecosystems, air quality, and multiple socio-economic sectors. However, there is an incomplete understanding of the emitted dust particle size distribution (PSD) in terms of its constituent minerals that typically result from the fragmentation of soil aggregates during wind erosion. The emitted dust PSD affects the duration of particle transport and thus each mineral\u2019s global distribution, along with its specific effect upon climate. This lack of understanding is largely due to the scarcity of relevant in situ measurements in dust sources. To advance our understanding of the physicochemical properties of the emitted dust PSD, we present insights into the elemental composition and morphology of individual dust particles collected during the FRontiers in dust minerAloGical coMposition and its Effects upoN climaTe (FRAGMENT) field campaign in the Moroccan Sahara in September 2019. We analyzed more than 300,000 freshly emitted individual particles by performing offline analysis in the laboratory using Scanning Electron Microscopy (SEM) coupled with Energy-Dispersive X-ray Spectrometry (EDX). Eight major particle-type classes were identified where clay minerals make up the majority of the analyzed particles by number, with carbonates and quartz contributing to a lesser extent. We provide an exhaustive analysis of the size distribution and potential mixing state of different particle types, focusing largely on iron-rich (Fe-oxi/hydroxides) and feldspar particles, which are key to the effects of dust upon radiation and clouds. Nearly pure or externally mixed Fe-oxi/hydroxides are present only in diameters smaller than 2 \u00b5m and mainly below 1 \u00b5m. Fe-oxi/hydroxides tend to be increasingly internally mixed with other minerals, especially clays, as particle size increases, i.e., the volume fraction of Fe-oxi/hydroxides in aggregates decreases with particle size. Pure (externally-mixed) feldspar grains represented 3.7 % of all the particles, of which we estimated about a quarter to be K-feldspar. The externally-mixed total feldspar and K-feldspar abundances are relatively invariant with particle size, in contrast to the increasing abundance of feldspar-like (internally-mixed) aggregates with particle size. We also found that overall the median aspect ratio is rather constant across particle size and mineral groups, although we obtain slightly higher aspect ratios for internally-mixed particles. The detailed information on the composition of freshly emitted individual dust particles along with the quantitative analysis of their mixing state presented here can be used to constrain climate models including mineral species in their representation of the dust cycle.
", "keywords": ["Atmospheric chemistry", "550", "QC1-999", "http://metadata.un.org/sdg/3", "Mineral dust", "01 natural sciences", "Climate models", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia", "Aerosols Measurement", "Pols minerals", "QD1-999", "Ensure healthy lives and promote well-being for all at all ages", "0105 earth and related environmental sciences", "mineral dust", "info:eu-repo/classification/ddc/550", "electron microscopy", "ddc:550", "Physics", "15. Life on land", "info:eu-repo/classification/udc/502.3/.7", "Pollution", "Moroccan Sahara", "Earth sciences", "Chemistry", "13. Climate action", "Mineral dust particles", "Air quality", "Desert dust"]}, "links": [{"href": "https://acp.copernicus.org/articles/23/3861/2023/acp-23-3861-2023.pdf"}, {"href": "https://acp.copernicus.org/articles/23/3861/2023/acp-23-3861-2023-supplement.pdf"}, {"href": "https://doi.org/10.5194/acp-2022-742"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Chemistry%20and%20Physics", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/acp-2022-742", "name": "item", "description": "10.5194/acp-2022-742", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/acp-2022-742"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-11-07T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Minerals&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Minerals&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Minerals&", "hreflang": "en-US"}, {"rel": "next", "type": "application/geo+json", "title": "items (next)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Minerals&offset=50", "hreflang": "en-US"}], "numberMatched": 94, "numberReturned": 50, "distributedFeatures": [], "timeStamp": "2026-04-04T07:30:12.019313Z"}