OPENAIRE OpenAire Datacite Sygma Bielefeld Academic Search Engine (BASE) UnpayWall HAL-INSU Digitala Vetenskapliga Arkivet - Academic Archive On-line Publikationer från Uppsala Universitet Crossref Microsoft Academic Graph OpenAPC Global Initiative HAL-CEA European Union Open Data Portal http://link.springer.com/content/pdf/10.1007/s10533-021-00759-x.pdf https://doi.org/10.1007/s10533-021-00759-x Biogeochemistry Open Access 2021-01-26 2021-03-02 Abstract<p>Quantifying the upper limit of stable soil carbon storage is essential for guiding policies to increase soil carbon storage. One pool of carbon considered particularly stable across climate zones and soil types is formed when dissolved organic carbon sorbs to minerals. We quantified, for the first time, the potential of mineral soils to sorb additional dissolved organic carbon (DOC) for six soil orders. We compiled 402 laboratory sorption experiments to estimate the additional DOC sorption potential, that is the potential of excess DOC sorption in addition to the existing background level already sorbed in each soil sample. We estimated this potential using gridded climate and soil geochemical variables within a machine learning model. We find that mid- and low-latitude soils and subsoils have a greater capacity to store DOC by sorption compared to high-latitude soils and topsoils. The global additional DOC sorption potential for six soil orders is estimated to be 107 $$ pm$$ ￂﾱ 13 Pg C to 1ￂﾠm depth. If this potential was realized, it would represent a 7% increase in the existing total carbon stock.</p 550 Mineral association Organic chemistry Carbon Dynamics in Peatland Ecosystems Markvetenskap 01 natural sciences 7. Clean energy Agricultural and Biological Sciences Soil water 11. Sustainability Carbon fibers Water Science and Technology 2. Zero hunger Latitude Ecology Total organic carbon Life Sciences Composite number Geology 04 agricultural and veterinary sciences Saturation Miljövetenskap Soil carbon [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment Algorithm Chemistry Physical Sciences Environmental chemistry Sorption Additional sorption potential environment Geodesy Biogeochemical Cycling of Nutrients in Aquatic Ecosystems Soil Science Environmental science FOS: Mathematics Environmental Chemistry 14. Life underwater Soil Carbon Sequestration Earth-Surface Processes 0105 earth and related environmental sciences Soil science [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Soil organic carbon [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere FOS: Earth and related environmental sciences 15. Life on land 13. Climate action FOS: Biological sciences Environmental Science 0401 agriculture, forestry, and fisheries Adsorption [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces Soil Carbon Dynamics and Nutrient Cycling in Ecosystems Dissolved organic carbon Environmental Sciences Mathematics Dolly N. Kothawala, Sindhu Jagadamma, Haicheng Zhang, R. Z. Abramoff, Wenting Feng, Bertrand Guenet, Bertrand Guenet, Klaus Kaiser, Margaret S. Torn, Yuanyuan Huang, Philippe Ciais, Katerina Georgiou, Melanie A. Mayes, 2021-01-26 journalpaper Abstract<p>Quantifying the upper limit of stable soil carbon storage is essential for guiding policies to increase soil carbon storage. One pool of carbon considered particularly stable across climate zones and soil types is formed when dissolved organic carbon sorbs to minerals. We quantified, for the first time, the potential of mineral soils to sorb additional dissolved organic carbon (DOC) for six soil orders. We compiled 402 laboratory sorption experiments to estimate the additional DOC sorption potential, that is the potential of excess DOC sorption in addition to the existing background level already sorbed in each soil sample. We estimated this potential using gridded climate and soil geochemical variables within a machine learning model. We find that mid- and low-latitude soils and subsoils have a greater capacity to store DOC by sorption compared to high-latitude soils and topsoils. The global additional DOC sorption potential for six soil orders is estimated to be 107 $$ pm$$ ￂﾱ 13 Pg C to 1ￂﾠm depth. If this potential was realized, it would represent a 7% increase in the existing total carbon stock.</p How much carbon can be added to soil by sorption? 10.1007/s10533-021-00759-x 834169