美国加州理工学院Yinon M. Bar-On团队揭示了最近全球陆地碳储量的增加大多储存在无生命池中。2025年3月21日出版的《科学》杂志发表了这项成果。

陆地碳固存减少了约30%的人为碳排放。然而，其在不同水池、活生物量或死生物量、土壤和沉积有机碳中的分布仍然不确定。通过分析陆地碳库变化的全球观测数据集，研究组发现1992年至2019年间，陆地上封存了约35±14亿吨碳（GtC），而活生物量变化了约1±7 GtC。

相反，全球植被模型表明，封存主要存在于活生物量中。研究组确定了大多数模型中未包含的关键过程，这些过程可以解释这种差异。大多数陆地碳收益被封存为非生命物质，因此比以前认识到的更持久，其中很大一部分与人类活动有关，如筑坝、伐木和垃圾填埋场的垃圾处理。

附：英文原文

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

Author: Yinon M. Bar-On, Xiaojun Li, Michael O’Sullivan, Jean-Pierre Wigneron, Stephen Sitch, Philippe Ciais, Christian Frankenberg, Woodward W. Fischer

Issue&Volume: 2025-03-21

Abstract: Terrestrial sequestration of carbon has mitigated ≈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 ≈35 ± 14 gigatons of carbon (GtC) have been sequestered on land between 1992 and 2019, whereas live biomass changed by ≈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.

DOI: adk1637

Source: https://www.science.org/doi/10.1126/science.adk1637