Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1291-1295 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 387 |
| Issue number | 6740 |
| DOIs | |
| Publication status | Published - 21 Mar 2025 |
Funding
We thank A. Flamholz, W. Schleisinger, Y. Yin, Y. Yao, T. Schneider, A. Renchon, R. Milo, G. Grassi, P. Wennberg, and M. Santoro for productive feedback on this manuscript. Funding - Rothschild Postdoctoral Fellowship (Y.M.B.-O.); Resnick Sustainability Institute (Y.M.B.-O., W.W.F., C.F.); David and Lucile Packard Foundation (W.W.F.); Schmidt Science Fellows (Y.M.B.-O.). X.L. was supported by the European Space Agency (ESA) RECCAP2 project. J.-P.W. acknowledges support from the CNES (Centre National d’Etudes Spatiales) TOSCA programme. S.S. was supported by ESA RECCAP2 [contract nos. 4000123002/18/I-NB (RECCAP2-A) and 4000144908/24/1-LR (RECCAP2-CS)].
All Science Journal Classification (ASJC) codes
- General