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Adv."],"published-print":{"date-parts":[[2026,9,25]]},"abstract":"<jats:p>\n                    Soil respiration counterbalances global photosynthesis, yet several aspects of this process remain unexplained despite decades of research: (i) nighttime negative soil carbon flux in drylands and (ii) diurnal temperature-dependent hysteresis patterns. We propose that abiotic CO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption-desorption in the soil is the cause or contributor to these phenomena. Laboratory isotherms were conducted on desert soil at various diurnal temperatures and CO\n                    <jats:sub>2<\/jats:sub>\n                    partial pressure levels. These results, combined with field data from the Mojave Desert, demonstrate that adsorption causes negative nocturnal CO\n                    <jats:sub>2<\/jats:sub>\n                    fluxes, while desorption during the day leads to positive fluxes. In addition, by accounting for thermally driven physical CO\n                    <jats:sub>2<\/jats:sub>\n                    exchange, the apparent temperature hysteresis commonly observed is reversed. The annual CO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption in the thermally active soil layer ranges from 16.7 to 19.3 grams of CO\n                    <jats:sub>2<\/jats:sub>\n                    -C per square meter per year, indicating a possible abiotic exchange of up to 2.2 to 2.5 billion tonnes of CO\n                    <jats:sub>2<\/jats:sub>\n                    -C with the atmosphere globally. Our findings suggest that gaseous adsorption should be included in the global carbon cycle to more accurately represent land-atmosphere CO\n                    <jats:sub>2<\/jats:sub>\n                    exchange.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aed9979","type":"journal-article","created":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T17:59:49Z","timestamp":1790186389000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Thermally driven CO\n                    <sub>2<\/sub>\n                    adsorption\/desorption and its effect on soil respiration"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9142-636X","authenticated-orcid":true,"given":"Anna","family":"Abramova","sequence":"first","affiliation":[{"name":"Department of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA 94720, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1775-5509","authenticated-orcid":true,"given":"Jennifer","family":"Mills","sequence":"additional","affiliation":[{"name":"Department of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA 94720, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3007-8058","authenticated-orcid":true,"given":"Gregory E.","family":"Maurer","sequence":"additional","affiliation":[{"name":"Jornada Basin LTER Program, New Mexico State University, Las Cruces, NM 88003, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0853-0826","authenticated-orcid":true,"given":"Benjamin","family":"Gilbert","sequence":"additional","affiliation":[{"name":"Earth and Environmental Sciences, Energy Geosciences, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 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