Recent gains in global terrestrial carbon stocks are mostly stored in nonliving pools

• 成果类型: Article
• 署名作者: Bar-On, Yinon M.; Li, Xiaojun; O'Sullivan, Michael; Wigneron, Jean-Pierre; Sitch, Stephen; Ciais, Philippe; Frankenberg, Christian; Fischer, Woodward W.
• 署名单位: California Institute of Technology; Universite de Bordeaux; INRAE; Southwest Jiaotong University; University of Exeter; CEA; Universite Paris Saclay; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); California Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10530
• DOI: 10.1126/science.adk1637
• 发表日期: 2025-03-21
• 页码: 1291-1295
• 关键词: agricultural soil-erosion; land-use change; emissions; biomass; IMPACT; forests; fluxes; worlds; sink; map

摘要

Terrestrial sequestration of carbon has mitigated approximate to 30% of anthropogenic carbon emissions. However, its distribution across different pools, live or dead biomass and soil and sedimentary organic carbon, remains uncertain. Analyzing global observational datasets of changes in terrestrial carbon pools, we found that approximate to 35 +/- 14 gigatons of carbon (GtC) have been sequestered on land between 1992 and 2019, whereas live biomass changed by approximate to 1 +/- 7 GtC. Global vegetation models instead imply that sequestration has been mostly in live biomass. We identify key processes not included in most models that can explain this discrepancy. Most terrestrial carbon gains are sequestered as nonliving matter and thus are more persistent than previously appreciated, with a substantial fraction linked to human activities such as river damming, wood harvest, and garbage disposal in landfills.