Details

Autor(en) / Beteiligte

• Ciais, Philippe
• Yao, Yitong
• Gasser, Thomas
• Baccini, Alessandro
• Wang, Yilong
• Lauerwald, Ronny
• Peng, Shushi
• Bastos, Ana
• Li, Wei
• Raymond, Peter A.
• Canadell, Josep G.
• Peters, Glen P.
• Andres, Rob J.
• Chang, Jinfeng
• Yue, Chao
• Dolman, A. Johannes
• Haverd, Vanessa
• Hartmann, Jens
• Laruelle, Goulven
• Konings, Alexandra G.
• King, Anthony W.
• Liu, Yi
• Luyssaert, Sebastiaan
• Maignan, Fabienne
• Patra, Prabir K.
• Peregon, Anna
• Regnier, Pierre
• Pongratz, Julia
• Poulter, Benjamin
• Shvidenko, Anatoly
• Valentini, Riccardo
• Wang, Rong
• Broquet, Gregoire
• Yin, Yi
• Zscheischler, Jakob
• Guenet, Bertrand
• Goll, Daniel S.
• Ballantyne, Ashley-P.
• Yang, Hui
• Qiu, Chunjing
• Zhu, Dan

Titel

Empirical estimates of regional carbon budgets imply reduced global soil heterotrophic respiration

Ist Teil von

• National science review, 2021-02, Vol.8 (2), p.nwaa145-nwaa145

Ort / Verlag

Goddard Space Flight Center: Oxford University Press

Erscheinungsjahr

2021

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Resolving regional carbon budgets is critical for informing land-based mitigation policy. For nine regions covering nearly the whole globe, we collected inventory estimates of carbon-stock changes complemented by satellite estimates of biomass changes where inventory data are missing. The net land–atmospheric carbon exchange (NEE) was calculated by taking the sum of the carbon-stock change and lateral carbon fluxes from crop and wood trade, and riverine-carbon export to the ocean. Summing up NEE from all regions, we obtained a global ‘bottom-up’ NEE for net land anthropogenic CO2 uptake of –2.2±0.6 PgC/yr consistent with the independent top-down NEE from the global atmospheric carbon budget during 2000–2009. This estimate is so far the most comprehensive global bottom-up carbon budget accounting, which set up an important milestone for global carbon-cycle studies. By decomposing NEE into component fluxes, we found that global soil heterotrophic respiration amounts to a source of CO2 of 39 PgC/yr with an interquartile of 33–46 PgC/yr —a much smaller portion of net primary productivity than previously reported.