{"type": "FeatureCollection", "features": [{"id": "10.5194/amt-9-3769-2016", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2016-08-17", "title": "Recommendations for processing atmospheric attenuated backscatter profiles from Vaisala CL31 ceilometers", "description": "<p>Abstract. Ceilometer lidars are used for cloud base height detection, to probe aerosol layers in the atmosphere (e.g. detection of elevated layers of Saharan dust or volcanic ash), and to examine boundary layer dynamics. Sensor optics and acquisition algorithms can strongly influence the observed attenuated backscatter profiles; therefore, physical interpretation of the profiles requires careful application of corrections. This study addresses the widely deployed Vaisala CL31 ceilometer. Attenuated backscatter profiles are studied to evaluate the impact of both the hardware generation and firmware version. In response to this work and discussion within the CL31/TOPROF user community (TOPROF, European COST Action aiming to harmonise ground-based remote sensing networks across Europe), Vaisala released new firmware (versions 1.72 and 2.03) for the CL31 sensors. These firmware versions are tested against previous versions, showing that several artificial features introduced by the data processing have been removed. Hence, it is recommended to use this recent firmware for analysing attenuated backscatter profiles. To allow for consistent processing of historic data, correction procedures have been developed that account for artefacts detected in data collected with older firmware. Furthermore, a procedure is proposed to determine and account for the instrument-related background signal from electronic and optical components. This is necessary for using attenuated backscatter observations from any CL31 ceilometer. Recommendations are made for the processing of attenuated backscatter observed with Vaisala CL31 sensors, including the estimation of noise which is not provided in the standard CL31 output. After taking these aspects into account, attenuated backscatter profiles from Vaisala CL31 ceilometers are considered capable of providing valuable information for a range of applications including atmospheric boundary layer studies, detection of elevated aerosol layers, and model verification.                     </p>", "keywords": ["Earthwork. Foundations", "13. Climate action", "TA715-787", "Environmental engineering", "TA170-171", "01 natural sciences", "0105 earth and related environmental sciences", "3. Good health"]}, "links": [{"href": "https://centaur.reading.ac.uk/66454/1/amt-9-3769-2016.pdf"}, {"href": "https://amt.copernicus.org/articles/9/3769/2016/amt-9-3769-2016.pdf"}, {"href": "https://doi.org/10.5194/amt-9-3769-2016"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-9-3769-2016", "name": "item", "description": "10.5194/amt-9-3769-2016", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-9-3769-2016"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-08-17T00:00:00Z"}}, {"id": "10.26083/tuprints-00030053", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:20:26Z", "type": "Journal Article", "created": "2025-05-16", "title": "Performance of a low-cost optical particle counter (Alphasense OPC-N3) in estimating size-resolved dust emission flux using eddy covariance", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. The recent development of low-cost optical particle counters (OPCs) presents new opportunities for improving spatial coverage of particle concentration in the atmosphere as they are more affordable, compact, and energy efficient than traditional OPCs. In particular, these OPCs could improve our ability to quantify dust emissions in complex environments during aeolian soil erosion. The high-frequency sampling capacity (1\u2009Hz) of some sensors may make them suitable for estimating dust emissions using the eddy-covariance method. Here, the capability of the low-cost OPC-N3 from Alphasense to estimate size-resolved dust flux using the eddy-covariance method is evaluated. During the Jordan Wind erosion And Dust Investigation (J-WADI) experiment, we tested one OPC-N3 against two traditional reference OPCs, the Promo and Fidas, from Palas GmbH. The N3 and Promo OPCs were located in close proximity to a sonic anemometer, enabling the correlation of dust concentration and vertical velocity fluctuations for estimating dust fluxes. Despite the high-temperature and dusty wind conditions of the campaign, the N3 monitored the dynamics and magnitude of dust concentration with reasonable precision. The turbulence characteristics of the dust concentration fluctuations measured by the N3, including variance, skewness, kurtosis, and energy spectrum, were similar to those from the Promo. However, the N3 flow rate exhibited variations under these outdoor conditions that affected the concentration of fine dust particles, and certain particles around 1\u2009\u00b5m appeared to be misclassified in the upper size bin. After correcting the N3 dust concentration to address these discrepancies and after calibrating it against a reference OPC, the N3 accurately estimated the dust emission flux, with differences of less than 30\u2009% compared to the reference OPC. Our results confirm the potential of low-cost OPCs for dust erosion research. Nonetheless, further evaluation of low-cost OPCs is still needed across different environments and weather conditions.                     </p></article>", "keywords": ["[SDE] Environmental Sciences", "Earthwork. Foundations", "TA715-787", "Environmental engineering", "TA170-171"]}, "links": [{"href": "https://doi.org/10.26083/tuprints-00030053"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.26083/tuprints-00030053", "name": "item", "description": "10.26083/tuprints-00030053", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.26083/tuprints-00030053"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-11-28T00:00:00Z"}}, {"id": "10.5194/amt-14-4445-2021", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2021-03-22", "title": "An automated system for trace gas flux measurements from plant foliage and other plant compartments", "description": "<p>Abstract. Plant shoots can act as sources or sinks of trace gases including methane and nitrous oxide. Accurate measurementsof these trace gas fluxes require enclosing of shoots in closed non-steady state chambers. Due to plant physiological activity, this type of enclosures, however, lead to CO2 depletion in the enclosed air volume, condensation of transpired water, and warmingof the enclosures exposed to sunlight, all of which may bias the flux measurements. Here, we present PlasTraGAS, ab novel measurement system designed for continuous and automated measurements of trace gas and volatile organic compound (VOC) fluxes from plant shoots. The system uses transparent shoot enclosures equipped with Peltier cooling elements and automatically replaces fixated CO2 and removes transpired water from the enclosure. The system is designed for measuring trace gasfluxes over extended periods, capturing diurnal and seasonal variations and linking trace gas exchange to plant physiologicalfunctioning and environmental drivers. Initial measurements show daytime CH4 emissions two pine shoots of 0.056 and 0.089 nmol g\uffe2\uff88\uff921 foliage d.w.h\uffe2\uff88\uff921or 7.80 and 13.1 nmol m\uffe2\uff88\uff922 h\uffe2\uff88\uff921. Simultaneously measured CO2 uptake rates were 9.2 and 7.6 mmol m\uffe2\uff88\uff922 sec\uffe2\uff88\uff921 and transpiration rates of 1.24 and 0.90 mol m\uffe2\uff88\uff922 h\uffe2\uff88\uff921. Concurrent measurement of VOC emissionsdemonstrated that potential effects of spectral interferences on CH4 flux measurements were at least ten-fold smaller than themeasured CH4 fluxes. Overall, this new system solves multiple technical problems that so far prevented automated plant shoottrace gas flux measurements, and holds the potential for providing important new insights into the role of plant foliage in the global CH4 and N2O cycles.                         </p>", "keywords": ["Earthwork. Foundations", "13. Climate action", "TA715-787", "Environmental engineering", "TA170-171", "15. Life on land", "7. Clean energy", "01 natural sciences", "Geosciences", "EMISSIONS", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/4445/2021/amt-14-4445-2021.pdf"}, {"href": "https://doi.org/10.5194/amt-14-4445-2021"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-14-4445-2021", "name": "item", "description": "10.5194/amt-14-4445-2021", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-14-4445-2021"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-03-22T00:00:00Z"}}, {"id": "10.5194/amt-13-4051-2020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2020-07-28", "title": "Evaluation of a field-deployable Nafion\u2122-based air-drying system for collecting whole air samples and its application to stable isotope measurements of CO&lt;sub&gt;2&lt;/sub&gt;", "description": "<p>Abstract. Atmospheric flask samples are either collected at atmospheric pressure by opening a valve of a pre-evacuated flask or pressurized with the help of a pump to a few bar above ambient pressure. Under humid conditions, there is a risk that water vapor in the sample leads to condensation on the walls of the flask, notably at higher than ambient sampling pressures. Liquid water in sample flasks is known to affect the CO2 mixing ratios and also alters the isotopic composition of oxygen (17O and 18O) in CO2 via isotopic equilibration. Hence, for accurate determination of CO2 mole fractions and its stable isotopic composition, it is vital to dry the air samples to a sufficiently low dew point before they are pressurized in flasks to avoid condensation. Moreover, the drying system itself should not influence the mixing ratio and the isotopic composition of CO2 or that of the other constituents under study. For the Airborne Stable Isotopes of Carbon from the Amazon (ASICA) project focusing on accurate measurements of CO2 and its singly substituted stable isotopologues over the Amazon, an air-drying system capable of removing water vapor from air sampled at a dew point lower than \uffe2\uff88\uff922\uffe2\uff80\uff89\uffe2\uff88\uff98C, flow rates up to 12\uffe2\uff80\uff89L\uffe2\uff80\uff89min\uffe2\uff88\uff921 and without the need for electrical power was needed. Since to date no commercial air-drying device that meets these requirements has been available, we designed and built our own consumable-free, power-free and portable drying system based on multitube Nafion\uffe2\uff84\uffa2 gas sample driers (Perma Pure, Lakewood, USA). The required dry purge air is provided by feeding the exhaust flow of the flask sampling system through a dry molecular sieve (type\uffc2\uffa03A) cartridge. In this study we describe the systematic evaluation of our Nafion\uffe2\uff84\uffa2-based air sample dryer with emphasis on its performance concerning the measurements of atmospheric CO2 mole fractions and the three singly substituted isotopologues of CO2 (16O13C16O, 16O12C17O and 16O12C18O), as well as the trace gas species CH4, CO, N2O and SF6. Experimental results simulating extreme tropical conditions (saturated air at 33\uffe2\uff80\uff89\uffe2\uff88\uff98C) indicated that the response of the air dryer is almost instantaneous and that approximately 85\uffe2\uff80\uff89L of air, containing up to 4\uffe2\uff80\uff89% water vapor, can be processed staying below a \uffe2\uff88\uff922\uffe2\uff80\uff89\uffe2\uff88\uff98C dew point temperature (at 275\uffe2\uff80\uff89kPa). We estimated that at least eight flasks can be sampled (at an overpressure of 275\uffe2\uff80\uff89kPa) with a water vapor content below \uffe2\uff88\uff922\uffe2\uff80\uff89\uffe2\uff88\uff98C dew point temperature during a typical flight sampling up to 5\uffe2\uff80\uff89km altitude over the Amazon, whereas the remaining samples would stay well below 5\uffe2\uff80\uff89\uffe2\uff88\uff98C dew point temperature (at 275\uffe2\uff80\uff89kPa). The performance of the air dryer on measurements of CO2, CH4, CO, N2O, and SF6 and the CO2 isotopologues 16O13C16O and 16O12C18O was tested in the laboratory simulating real sampling conditions by compressing humidified air from a calibrated cylinder, after being dried by the air dryer, into sample flasks. We found that the mole fraction and the isotopic composition difference between the different test conditions (including the dryer) and the base condition (dry air, without dryer) remained well within or very close to, in the case of N2O, the World Meteorological Organization recommended compatibility goals for independent measurement programs, proving that the test condition induced no significant bias on the sample measurements.                     </p>", "keywords": ["0301 basic medicine", "CH4", "TA715-787", "Environmental engineering", "PERFORMANCE", "TA170-171", "7. Clean energy", "01 natural sciences", "6. Clean water", "CARBON-DIOXIDE", "03 medical and health sciences", "DESIGN", "Earthwork. Foundations", "13. Climate action", "BALANCE", "0103 physical sciences", "Life Science", "CYCLE", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.5194/amt-13-4051-2020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-13-4051-2020", "name": "item", "description": "10.5194/amt-13-4051-2020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-13-4051-2020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-08-27T00:00:00Z"}}, {"id": "10.5194/amt-13-4295-2020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2020-01-22", "title": "Improved SIFTER v2 algorithm for long-term GOME-2A satellite retrievals of fluorescence with a correction for instrument degradation", "description": "<p>Abstract. Solar-induced fluorescence (SIF) data from satellites are increasingly used as a proxy for photosynthetic activity by vegetation, and as a constraint on gross primary production. Here we develop an improved retrieval algorithm to retrieve mid-morning (09:30 hrs local time) SIF estimates on the global scale from GOME-2 sensor on the Metop-A satellite (GOME-2A) for the period 2007\uffe2\uff80\uff932019. Our new SIFTER v2 algorithm improves over a previous version by using a narrower spectral window that avoids strong oxygen absorption and is less sensitive to water vapour absorption, by constructing stable reference spectra from a 6-year period (2007\uffe2\uff80\uff932012) of atmospheric spectra over the Sahara, and by applying a latitude-dependent zero-level adjustment that accounts for biases in the data product. We generated stable, good-quality SIF retrievals between January 2007 and June 2013, when GOME-2A degradation in the near infrared was still limited. After the narrowing of the GOME-2A swath in July 2013, we characterized the throughput degradation of the level-1 data in order to derive reflectance corrections and apply these for the SIF retrievals between July 2013 and December 2018. SIFTER v2 data compares well with the independent NASA v2.8 data product. Especially in the evergreen tropics, SIFTER v2 no longer shows the underestimates against other satellite products that were seen in SIFTER v1. The new data product includes uncertainty estimates for individual observations, and is best used for mostly clear-sky scenes, and when spectral residuals remain below a certain spectral autocorrelation threshold. Our results support the use of SIFTER v2 data to be used as an independent constraint on photosynthetic activity on regional to global scales.                         </p>", "keywords": ["PHOTOSYNTHESIS", "TA715-787", "Environmental engineering", "04 agricultural and veterinary sciences", "TA170-171", "15. Life on land", "01 natural sciences", "TERRESTRIAL CHLOROPHYLL FLUORESCENCE", "SIMULATIONS", "Earthwork. Foundations", "13. Climate action", "Life Science", "0401 agriculture", " forestry", " and fisheries", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/13/4295/2020/amt-13-4295-2020.pdf"}, {"href": "https://doi.org/10.5194/amt-13-4295-2020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-13-4295-2020", "name": "item", "description": "10.5194/amt-13-4295-2020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-13-4295-2020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-01-22T00:00:00Z"}}, {"id": "10.5194/amt-14-2409-2021", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2020-09-23", "title": "Suitability of fibre-optic distributed temperature sensing for revealing mixing processes and higher-order moments at the forest\u2013air interface", "description": "<p>Abstract. Suitability of fibre-optic distributed temperature sensing (DTS) technique to observe atmospheric mixing profiles within and above forest was quantified and these profiles were analysed. The spatially continuous observations were made at a 125\uffe2\uff80\uff89m tall mast in a boreal pine forest. Air flows near forest canopies diverge from typical boundary layer flows due to the influence of roughness elements (i.e. trees) on the flow. Ideally these complex flows should be studied with spatially continuous measurements, yet such measurements are not feasible with conventional micrometeorological measurements with e.g. sonic anemometers. Hence the suitability of DTS measurements for studying canopy flows was quantified. The DTS measurements were able to discern continuous profiles of turbulent fluctuations and mean values of air temperature along the mast providing information about mixing processes (e.g. canopy eddies, evolution of inversion layers at night) and up to third order turbulence statistics across the forest-atmosphere interface. Turbulence measurements with 3D sonic anemometers and Doppler lidar at the site were also utilised in this analysis. The continuous profiles for turbulence statistics were in line with prior studies made at wind tunnels and large eddy simulations for canopy flows. The DTS measurements contained a significant noise component which was however quantified and its effect on turbulence statistics was accounted for. Underestimation of air temperature fluctuations at high frequencies caused 20...30\uffe2\uff80\uff89% underestimation of temperature variance at typical flow conditions. Despite these limitations, the DTS measurements should prove useful also in other studies concentrating on flows near roughness elements and/or non-stationary periods, since the measurements revealed spatio-temporal patterns of the flow which were not possible to discern from single point measurements fixed in space.                         </p>", "keywords": ["Fiber-optic distributed sensing", "550", "Airflow", "TA715-787", "Environmental engineering", "Forestry", "TA170-171", "15. Life on land", "530", "01 natural sciences", "Environmental sciences", "Turbulence", "Earthwork. Foundations", "13. Climate action", "Forest", "Geosciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/2409/2021/amt-14-2409-2021.pdf"}, {"href": "https://doi.org/10.5194/amt-14-2409-2021"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-14-2409-2021", "name": "item", "description": "10.5194/amt-14-2409-2021", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-14-2409-2021"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-09-23T00:00:00Z"}}, {"id": "10.5194/amt-14-5607-2021", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2021-08-17", "title": "Something fishy going on? Evaluating the Poisson hypothesis for rainfall estimation using intervalometers: results from an experiment in Tanzania", "description": "<p>Abstract. A new type of rainfall sensor (the intervalometer), which counts the arrival of raindrops at a piezo electric element, is implemented during the Tanzanian monsoon season alongside tipping bucket rain gauges and an impact disdrometer. The aim is to test the validity of the Poisson hypothesis underlying the estimation of rainfall rates using an experimentally determined raindrop size distribution parameterisation based on Marshall and Palmer (1948)'s exponential one. These parameterisations are defined independently of the scale of observation and therefore implicitly assume that rainfall is a homogeneous Poisson process. The results show that 28.3\uffe2\uff80\uff89% of the total intervalometer observed rainfall patches can reasonably be considered Poisson distributed and that the main reasons for Poisson deviations of the remaining 71.7\uffe2\uff80\uff89% are non-compliance with the stationarity criterion (45.9\uffe2\uff80\uff89%), the presence of correlations between drop counts (7.0\uffe2\uff80\uff89%), particularly at higher arrival rates (\uffcf\uff81a&gt;500\uffe2\uff80\uff89m-2s-1), and failing a \uffcf\uff872 goodness-of-fit test for a Poisson distribution (17.7\uffe2\uff80\uff89%). Our results show that whilst the Poisson hypothesis is likely not strictly true for rainfall that contributes most to the total rainfall amount, it is quite useful in practice and may hold under certain rainfall conditions. The parameterisation that uses an experimentally determined power law relation between N0 and rainfall rate results in the best estimates of rainfall amount compared to co-located tipping bucket measurements. Despite the non-compliance with the Poisson hypothesis, estimates of total rainfall amount over the entire observational period derived from disdrometer drop counts are within 4\uffe2\uff80\uff89% of co-located tipping bucket measurements. Intervalometer estimates of total rainfall amount overestimate the co-located tipping bucket measurement by 12\uffe2\uff80\uff89%. The intervalometer principle shows potential for use as a rainfall measurement instrument.                     </p>", "keywords": ["Earthwork. Foundations", "13. Climate action", "TA715-787", "Environmental engineering", "TA170-171", "310", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/5607/2021/amt-14-5607-2021.pdf"}, {"href": "https://doi.org/10.5194/amt-14-5607-2021"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-14-5607-2021", "name": "item", "description": "10.5194/amt-14-5607-2021", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-14-5607-2021"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-22T00:00:00Z"}}, {"id": "10.5194/amt-18-2183-2025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2025-05-16", "title": "Performance of a low-cost optical particle counter (Alphasense OPC-N3) in estimating size-resolved dust emission flux using eddy covariance", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. The recent development of low-cost optical particle counters (OPCs) presents new opportunities for improving spatial coverage of particle concentration in the atmosphere as they are more affordable, compact, and energy efficient than traditional OPCs. In particular, these OPCs could improve our ability to quantify dust emissions in complex environments during aeolian soil erosion. The high-frequency sampling capacity (1\u2009Hz) of some sensors may make them suitable for estimating dust emissions using the eddy-covariance method. Here, the capability of the low-cost OPC-N3 from Alphasense to estimate size-resolved dust flux using the eddy-covariance method is evaluated. During the Jordan Wind erosion And Dust Investigation (J-WADI) experiment, we tested one OPC-N3 against two traditional reference OPCs, the Promo and Fidas, from Palas GmbH. The N3 and Promo OPCs were located in close proximity to a sonic anemometer, enabling the correlation of dust concentration and vertical velocity fluctuations for estimating dust fluxes. Despite the high-temperature and dusty wind conditions of the campaign, the N3 monitored the dynamics and magnitude of dust concentration with reasonable precision. The turbulence characteristics of the dust concentration fluctuations measured by the N3, including variance, skewness, kurtosis, and energy spectrum, were similar to those from the Promo. However, the N3 flow rate exhibited variations under these outdoor conditions that affected the concentration of fine dust particles, and certain particles around 1\u2009\u00b5m appeared to be misclassified in the upper size bin. After correcting the N3 dust concentration to address these discrepancies and after calibrating it against a reference OPC, the N3 accurately estimated the dust emission flux, with differences of less than 30\u2009% compared to the reference OPC. Our results confirm the potential of low-cost OPCs for dust erosion research. Nonetheless, further evaluation of low-cost OPCs is still needed across different environments and weather conditions.                     </p></article>", "keywords": ["[SDE] Environmental Sciences", "Earthwork. Foundations", "TA715-787", "Environmental engineering", "TA170-171"]}, "links": [{"href": "https://doi.org/10.5194/amt-18-2183-2025"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-18-2183-2025", "name": "item", "description": "10.5194/amt-18-2183-2025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-18-2183-2025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-11-28T00:00:00Z"}}, {"id": "10.5194/amt-18-3073-2025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2025-07-11", "title": "Characterization of filter photometer artifacts in soot and dust measurements \u2013 laboratory and ambient experiments using a traceably calibrated aerosol absorption reference", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. A novel reference absorption instrument based on photothermal interferometry \u2013 the dual-wavelength photothermal aerosol absorption monitor PTAAM-2\u03bb \u2013 and scattering measurements are used to characterize filter photometer artifacts in measurements of absorption coefficients of soot- and dust-dominated aerosol samples within laboratory and ambient campaigns. We provide, for different aerosol types, reference values of the multiple-scattering parameter, quantifying the artifact introduced by the interaction between the light, the particles, and the filter. The Aethalometer AE33 and the Continuous Light Absorption Photometer (CLAP) were characterized during a laboratory campaign where different soot and mineral dust samples were measured. Furthermore, ambient measurements during a campaign in Granada, Spain, were used to characterize the AE33 and MAAP (Multiangle Absorption Photometer), a pseudo-reference absorption instrument. The laboratory campaign showed significant wavelength dependence of the calibration parameter, the multiple-scattering parameter C. The C of the AE33 at 450 and 808\u2009nm was 4.08 and 3.95 and 6.25 and 5.27 for propane soot and diesel soot, respectively. For the CLAP, the C was 5.10 and 4.26 and 6.79 and 5.80 for propane and diesel soot, respectively. For the different mineral dust samples analyzed in the laboratory, the C at 450\u2009nm ranged between 2.74 and 3.03 for the AE33 and between 2.50 and 2.80 for the CLAP. The ambient measurements at Granada showed an overall C of 4.72 at 450\u2009nm and of 3.90 at 808\u2009nm for the AE33. The results for both the AE33 and the CLAP show a dependence with the particle size, with fine particles having the highest C values and with the C being reduced and leveling off for larger particles. Both the laboratory and the ambient measurements of the AE33 showed overlapping results. The cross-sensitivity to scattering was smaller for the CLAP than for the AE33. The values of the cross-sensitivity parameter ms at 450 and 808\u2009nm were 3.0\u2009% and 1.5\u2009% for the AE33 and 2.4\u2009% and 0.9\u2009% for the CLAP. The intercomparison of the MAAP with the PTAAM-2\u03bb during the ambient campaign in Granada showed that the MAAP overestimates the absorption coefficients for 47\u2009% at 637\u2009nm and features a cross-sensitivity to scattering of 2.4\u2009%.                     </p></article>", "keywords": ["Earthwork. Foundations", "TA715-787", "Environmental engineering", "TA170-171"]}, "links": [{"href": "https://doi.org/10.5194/amt-18-3073-2025"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-18-3073-2025", "name": "item", "description": "10.5194/amt-18-3073-2025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-18-3073-2025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-02-24T00:00:00Z"}}, {"id": "10.5194/amt-2020-222", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2020-06-22", "title": "ModIs Dust AeroSol (MIDAS): A global fine resolution dust optical depth dataset", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. Monitoring and describing the spatiotemporal variability of dust aerosols is crucial to understand their multiple effects, related feedbacks and impacts within the Earth system. This study describes the development of the MIDAS (ModIs Dust AeroSol) dataset. MIDAS provides columnar daily dust optical depth (DOD at 550\u2009nm) at global scale and fine spatial resolution (0.1\u00b0\u2009\u00d7\u20090.1\u00b0) over a decade (2007\u20132016). This new dataset combines quality filtered satellite aerosol optical depth (AOD) retrievals from MODIS-Aqua at swath level (Collection 6, Level 2), along with DOD-to-AOD ratios provided by MERRA-2 reanalysis to derive DOD on the MODIS native grid. The uncertainties of MODIS AOD and MERRA-2 dust fraction with respect to AERONET and CALIOP, respectively, are taken into account for the estimation of the total DOD uncertainty (including measurement and sampling uncertainties). MERRA-2 dust fractions are in very good agreement with CALIOP column-integrated dust fractions across the dust belt, in the Tropical Atlantic Ocean and the Arabian Sea; the agreement degrades in North America and the Southern Hemisphere where dust sources are smaller. MIDAS, MERRA-2 and CALIOP DODs strongly agree when it comes to annual and seasonal spatial patterns; however, deviations of dust loads' intensity are evident and regionally dependent. Overall, MIDAS is well correlated with ground-truth AERONET-derived DODs (R\u2009=\u20090.882), only showing a small negative bias (\u22120.009 or \u22125.307\u2009%). Among the major dust areas of the planet, the highest R values (up to 0.977) are found at sites of N. Africa, Middle East and Asia. MIDAS expands, complements and upgrades existing observational capabilities of dust aerosols and it is suitable for dust climatological studies, model evaluation and data assimilation.                         </p></article>", "keywords": ["Dust forecast", ":Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia [\u00c0rees tem\u00e0tiques de la UPC]", "Dust particles", "CALIOP", "TA715-787", "Environmental engineering", "Dust", "TA170-171", "Tropospheric aerosols", "Satellite aerosol optical depth", "16. Peace & justice", "ModIs Dust AeroSol (MIDAS)", "01 natural sciences", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia", "DUST-GLASS", "MODIS", "Earthwork. Foundations", "Conjunts de dades", "13. Climate action", "Stratospheric aerosols", "Dust aerosols", "Data sets", "MIDAS", "MERRA-2", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021.pdf"}, {"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021-supplement.pdf"}, {"href": "https://doi.org/10.5194/amt-2020-222"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-2020-222", "name": "item", "description": "10.5194/amt-2020-222", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-2020-222"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-22T00:00:00Z"}}, {"id": "10.5194/amt-2021-82", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:36Z", "type": "Journal Article", "created": "2021-03-22", "title": "An automated system for trace gas \ufb02ux measurements from plantfoliage and other plant compartments", "description": "<p>Abstract. Plant shoots can act as sources or sinks of trace gases including methane and nitrous oxide. Accurate measurementsof these trace gas fluxes require enclosing of shoots in closed non-steady state chambers. Due to plant physiological activity, this type of enclosures, however, lead to CO2 depletion in the enclosed air volume, condensation of transpired water, and warmingof the enclosures exposed to sunlight, all of which may bias the flux measurements. Here, we present PlasTraGAS, ab novel measurement system designed for continuous and automated measurements of trace gas and volatile organic compound (VOC) fluxes from plant shoots. The system uses transparent shoot enclosures equipped with Peltier cooling elements and automatically replaces fixated CO2 and removes transpired water from the enclosure. The system is designed for measuring trace gasfluxes over extended periods, capturing diurnal and seasonal variations and linking trace gas exchange to plant physiologicalfunctioning and environmental drivers. Initial measurements show daytime CH4 emissions two pine shoots of 0.056 and 0.089 nmol g\uffe2\uff88\uff921 foliage d.w.h\uffe2\uff88\uff921or 7.80 and 13.1 nmol m\uffe2\uff88\uff922 h\uffe2\uff88\uff921. Simultaneously measured CO2 uptake rates were 9.2 and 7.6 mmol m\uffe2\uff88\uff922 sec\uffe2\uff88\uff921 and transpiration rates of 1.24 and 0.90 mol m\uffe2\uff88\uff922 h\uffe2\uff88\uff921. Concurrent measurement of VOC emissionsdemonstrated that potential effects of spectral interferences on CH4 flux measurements were at least ten-fold smaller than themeasured CH4 fluxes. Overall, this new system solves multiple technical problems that so far prevented automated plant shoottrace gas flux measurements, and holds the potential for providing important new insights into the role of plant foliage in the global CH4 and N2O cycles.                         </p>", "keywords": ["Earthwork. Foundations", "13. Climate action", "TA715-787", "Environmental engineering", "TA170-171", "15. Life on land", "7. Clean energy", "01 natural sciences", "Geosciences", "EMISSIONS", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/4445/2021/amt-14-4445-2021.pdf"}, {"href": "https://doi.org/10.5194/amt-2021-82"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/amt-2021-82", "name": "item", "description": "10.5194/amt-2021-82", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/amt-2021-82"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-03-22T00:00:00Z"}}, {"id": "10261/401848", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:42Z", "type": "Journal Article", "created": "2025-07-11", "title": "Characterization of filter photometer artifacts in soot and dust measurements \u2013 laboratory and ambient experiments using a traceably calibrated aerosol absorption reference", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. A novel reference absorption instrument based on photothermal interferometry \u2013 the dual-wavelength photothermal aerosol absorption monitor PTAAM-2\u03bb \u2013 and scattering measurements are used to characterize filter photometer artifacts in measurements of absorption coefficients of soot- and dust-dominated aerosol samples within laboratory and ambient campaigns. We provide, for different aerosol types, reference values of the multiple-scattering parameter, quantifying the artifact introduced by the interaction between the light, the particles, and the filter. The Aethalometer AE33 and the Continuous Light Absorption Photometer (CLAP) were characterized during a laboratory campaign where different soot and mineral dust samples were measured. Furthermore, ambient measurements during a campaign in Granada, Spain, were used to characterize the AE33 and MAAP (Multiangle Absorption Photometer), a pseudo-reference absorption instrument. The laboratory campaign showed significant wavelength dependence of the calibration parameter, the multiple-scattering parameter C. The C of the AE33 at 450 and 808\u2009nm was 4.08 and 3.95 and 6.25 and 5.27 for propane soot and diesel soot, respectively. For the CLAP, the C was 5.10 and 4.26 and 6.79 and 5.80 for propane and diesel soot, respectively. For the different mineral dust samples analyzed in the laboratory, the C at 450\u2009nm ranged between 2.74 and 3.03 for the AE33 and between 2.50 and 2.80 for the CLAP. The ambient measurements at Granada showed an overall C of 4.72 at 450\u2009nm and of 3.90 at 808\u2009nm for the AE33. The results for both the AE33 and the CLAP show a dependence with the particle size, with fine particles having the highest C values and with the C being reduced and leveling off for larger particles. Both the laboratory and the ambient measurements of the AE33 showed overlapping results. The cross-sensitivity to scattering was smaller for the CLAP than for the AE33. The values of the cross-sensitivity parameter ms at 450 and 808\u2009nm were 3.0\u2009% and 1.5\u2009% for the AE33 and 2.4\u2009% and 0.9\u2009% for the CLAP. The intercomparison of the MAAP with the PTAAM-2\u03bb during the ambient campaign in Granada showed that the MAAP overestimates the absorption coefficients for 47\u2009% at 637\u2009nm and features a cross-sensitivity to scattering of 2.4\u2009%.</p></article>", "keywords": ["Make cities and human settlements inclusive", " safe", " resilient and sustainable", "Take urgent action to combat climate change and its impacts", "Build resilient infrastructure", " promote inclusive and sustainable industrialization and foster innovation", "Earthwork. Foundations", "TA715-787", "Environmental engineering", "http://metadata.un.org/sdg/13", "http://metadata.un.org/sdg/3", "TA170-171", "Aerosol absorption", "http://metadata.un.org/sdg/11", "http://metadata.un.org/sdg/9", "Ensure healthy lives and promote well-being for all at all ages"]}, "links": [{"href": "https://amt.copernicus.org/articles/18/3073/2025/amt-18-3073-2025.pdf"}, {"href": "https://doi.org/10261/401848"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/401848", "name": "item", "description": "10261/401848", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/401848"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-02-24T00:00:00Z"}}, {"id": "2117/345158", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:25:34Z", "type": "Journal Article", "created": "2020-06-22", "title": "ModIs Dust AeroSol (MIDAS): A global fine resolution dust optical depth dataset", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. Monitoring and describing the spatiotemporal variability of dust aerosols is crucial to understand their multiple effects, related feedbacks and impacts within the Earth system. This study describes the development of the MIDAS (ModIs Dust AeroSol) dataset. MIDAS provides columnar daily dust optical depth (DOD at 550\u2009nm) at global scale and fine spatial resolution (0.1\u00b0\u2009\u00d7\u20090.1\u00b0) over a decade (2007\u20132016). This new dataset combines quality filtered satellite aerosol optical depth (AOD) retrievals from MODIS-Aqua at swath level (Collection 6, Level 2), along with DOD-to-AOD ratios provided by MERRA-2 reanalysis to derive DOD on the MODIS native grid. The uncertainties of MODIS AOD and MERRA-2 dust fraction with respect to AERONET and CALIOP, respectively, are taken into account for the estimation of the total DOD uncertainty (including measurement and sampling uncertainties). MERRA-2 dust fractions are in very good agreement with CALIOP column-integrated dust fractions across the dust belt, in the Tropical Atlantic Ocean and the Arabian Sea; the agreement degrades in North America and the Southern Hemisphere where dust sources are smaller. MIDAS, MERRA-2 and CALIOP DODs strongly agree when it comes to annual and seasonal spatial patterns; however, deviations of dust loads' intensity are evident and regionally dependent. Overall, MIDAS is well correlated with ground-truth AERONET-derived DODs (R\u2009=\u20090.882), only showing a small negative bias (\u22120.009 or \u22125.307\u2009%). Among the major dust areas of the planet, the highest R values (up to 0.977) are found at sites of N. Africa, Middle East and Asia. MIDAS expands, complements and upgrades existing observational capabilities of dust aerosols and it is suitable for dust climatological studies, model evaluation and data assimilation.</p></article>", "keywords": ["Dust forecast", ":Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia [\u00c0rees tem\u00e0tiques de la UPC]", "Dust particles", "TA715-787", "Environmental engineering", "TA170-171", "Tropospheric aerosols", "Satellite aerosol optical depth", "16. Peace & justice", "ModIs Dust AeroSol (MIDAS)", "01 natural sciences", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia", "Earthwork. Foundations", "Conjunts de dades", "13. Climate action", "Stratospheric aerosols", "Dust aerosols", "Data sets", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021.pdf"}, {"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021-supplement.pdf"}, {"href": "https://doi.org/2117/345158"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2117/345158", "name": "item", "description": "2117/345158", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2117/345158"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-22T00:00:00Z"}}, {"id": "10138/333024", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:32Z", "type": "Journal Article", "created": "2021-03-22", "title": "An automated system for trace gas \ufb02ux measurements from plantfoliage and other plant compartments", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. Plant shoots can act as sources or sinks of trace gases including methane and nitrous oxide. Accurate measurementsof these trace gas fluxes require enclosing of shoots in closed non-steady state chambers. Due to plant physiological activity, this type of enclosures, however, lead to CO2 depletion in the enclosed air volume, condensation of transpired water, and warmingof the enclosures exposed to sunlight, all of which may bias the flux measurements. Here, we present PlasTraGAS, ab novel measurement system designed for continuous and automated measurements of trace gas and volatile organic compound (VOC) fluxes from plant shoots. The system uses transparent shoot enclosures equipped with Peltier cooling elements and automatically replaces fixated CO2 and removes transpired water from the enclosure. The system is designed for measuring trace gasfluxes over extended periods, capturing diurnal and seasonal variations and linking trace gas exchange to plant physiologicalfunctioning and environmental drivers. Initial measurements show daytime CH4 emissions two pine shoots of 0.056 and 0.089 nmol g\u22121 foliage d.w.h\u22121or 7.80 and 13.1 nmol m\u22122 h\u22121. Simultaneously measured CO2 uptake rates were 9.2 and 7.6 mmol m\u22122 sec\u22121 and transpiration rates of 1.24 and 0.90 mol m\u22122 h\u22121. Concurrent measurement of VOC emissionsdemonstrated that potential effects of spectral interferences on CH4 flux measurements were at least ten-fold smaller than themeasured CH4 fluxes. Overall, this new system solves multiple technical problems that so far prevented automated plant shoottrace gas flux measurements, and holds the potential for providing important new insights into the role of plant foliage in the global CH4 and N2O cycles.</p></article>", "keywords": ["Earthwork. Foundations", "13. Climate action", "TA715-787", "Environmental engineering", "TA170-171", "15. Life on land", "7. Clean energy", "01 natural sciences", "Geosciences", "EMISSIONS", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/4445/2021/amt-14-4445-2021.pdf"}, {"href": "https://doi.org/10138/333024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10138/333024", "name": "item", "description": "10138/333024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10138/333024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-03-22T00:00:00Z"}}, {"id": "10261/390741", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:41Z", "type": "Journal Article", "created": "2025-05-16", "title": "Performance of a low-cost optical particle counter (Alphasense OPC-N3) in estimating size-resolved dust emission flux using eddy covariance", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. The recent development of low-cost optical particle counters (OPCs) presents new opportunities for improving spatial coverage of particle concentration in the atmosphere as they are more affordable, compact, and energy efficient than traditional OPCs. In particular, these OPCs could improve our ability to quantify dust emissions in complex environments during aeolian soil erosion. The high-frequency sampling capacity (1\u2009Hz) of some sensors may make them suitable for estimating dust emissions using the eddy-covariance method. Here, the capability of the low-cost OPC-N3 from Alphasense to estimate size-resolved dust flux using the eddy-covariance method is evaluated. During the Jordan Wind erosion And Dust Investigation (J-WADI) experiment, we tested one OPC-N3 against two traditional reference OPCs, the Promo and Fidas, from Palas GmbH. The N3 and Promo OPCs were located in close proximity to a sonic anemometer, enabling the correlation of dust concentration and vertical velocity fluctuations for estimating dust fluxes. Despite the high-temperature and dusty wind conditions of the campaign, the N3 monitored the dynamics and magnitude of dust concentration with reasonable precision. The turbulence characteristics of the dust concentration fluctuations measured by the N3, including variance, skewness, kurtosis, and energy spectrum, were similar to those from the Promo. However, the N3 flow rate exhibited variations under these outdoor conditions that affected the concentration of fine dust particles, and certain particles around 1\u2009\u00b5m appeared to be misclassified in the upper size bin. After correcting the N3 dust concentration to address these discrepancies and after calibrating it against a reference OPC, the N3 accurately estimated the dust emission flux, with differences of less than 30\u2009% compared to the reference OPC. Our results confirm the potential of low-cost OPCs for dust erosion research. Nonetheless, further evaluation of low-cost OPCs is still needed across different environments and weather conditions.</p></article>", "keywords": ["[SDE] Environmental Sciences", "Earth sciences", "info:eu-repo/classification/ddc/550", "Build resilient infrastructure", " promote inclusive and sustainable industrialization and foster innovation", "Earthwork. Foundations", "Optical particle counters (OPCs)", "ddc:550", "TA715-787", "Environmental engineering", "TA170-171", "http://metadata.un.org/sdg/3", "http://metadata.un.org/sdg/9", "Ensure healthy lives and promote well-being for all at all ages"]}, "links": [{"href": "https://doi.org/10261/390741"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/390741", "name": "item", "description": "10261/390741", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/390741"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-11-28T00:00:00Z"}}, {"id": "3045418312", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:26:05Z", "type": "Journal Article", "created": "2020-06-22", "title": "ModIs Dust AeroSol (MIDAS): A global fine resolution dust optical depth dataset", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>Abstract. Monitoring and describing the spatiotemporal variability of dust aerosols is crucial to understand their multiple effects, related feedbacks and impacts within the Earth system. This study describes the development of the MIDAS (ModIs Dust AeroSol) dataset. MIDAS provides columnar daily dust optical depth (DOD at 550\u2009nm) at global scale and fine spatial resolution (0.1\u00b0\u2009\u00d7\u20090.1\u00b0) over a decade (2007\u20132016). This new dataset combines quality filtered satellite aerosol optical depth (AOD) retrievals from MODIS-Aqua at swath level (Collection 6, Level 2), along with DOD-to-AOD ratios provided by MERRA-2 reanalysis to derive DOD on the MODIS native grid. The uncertainties of MODIS AOD and MERRA-2 dust fraction with respect to AERONET and CALIOP, respectively, are taken into account for the estimation of the total DOD uncertainty (including measurement and sampling uncertainties). MERRA-2 dust fractions are in very good agreement with CALIOP column-integrated dust fractions across the dust belt, in the Tropical Atlantic Ocean and the Arabian Sea; the agreement degrades in North America and the Southern Hemisphere where dust sources are smaller. MIDAS, MERRA-2 and CALIOP DODs strongly agree when it comes to annual and seasonal spatial patterns; however, deviations of dust loads' intensity are evident and regionally dependent. Overall, MIDAS is well correlated with ground-truth AERONET-derived DODs (R\u2009=\u20090.882), only showing a small negative bias (\u22120.009 or \u22125.307\u2009%). Among the major dust areas of the planet, the highest R values (up to 0.977) are found at sites of N. Africa, Middle East and Asia. MIDAS expands, complements and upgrades existing observational capabilities of dust aerosols and it is suitable for dust climatological studies, model evaluation and data assimilation.                         </p></article>", "keywords": ["Dust forecast", ":Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia [\u00c0rees tem\u00e0tiques de la UPC]", "Dust particles", "CALIOP", "TA715-787", "Environmental engineering", "Dust", "TA170-171", "Tropospheric aerosols", "Satellite aerosol optical depth", "16. Peace & justice", "ModIs Dust AeroSol (MIDAS)", "01 natural sciences", "\u00c0rees tem\u00e0tiques de la UPC::Enginyeria agroaliment\u00e0ria::Ci\u00e8ncies de la terra i de la vida::Climatologia i meteorologia", "DUST-GLASS", "MODIS", "Earthwork. Foundations", "Conjunts de dades", "13. Climate action", "Stratospheric aerosols", "Dust aerosols", "Data sets", "MIDAS", "MERRA-2", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021.pdf"}, {"href": "https://amt.copernicus.org/articles/14/309/2021/amt-14-309-2021-supplement.pdf"}, {"href": "https://doi.org/3045418312"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Atmospheric%20Measurement%20Techniques", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "3045418312", "name": "item", "description": "3045418312", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/3045418312"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-22T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Earthwork.+Foundations&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=Earthwork.+Foundations&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=Earthwork.+Foundations&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Earthwork.+Foundations&offset=16", "hreflang": "en-US"}], "numberMatched": 16, "numberReturned": 16, "distributedFeatures": [], "timeStamp": "2026-07-26T21:11:14.549175Z"}