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

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

机构地区：[1]Laboraloire des Sciences du Climat et de rEnvironnement,CEACNRS-UVSQ-UPSACLAY,Git sur Yvette 91191,France [2]Sino-French Institute tor Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China [3]International Institute for Applied Systems Analysis(IIASA),Laxenburg A-2361,Austria [4]Woods Hole Research Center,Falmouth,MA 02540,USA [5]The Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100871,China [6]Department Geoscience,Environment Society,University Libre de Bruxelles,Bruxelles 1050,Belgium [7]Department fur Geographie,Ludwig-Maxmiilians-Universitat Munchen,Miinchen D-80333,Germany [8]Department of Earth System Science,Tsinghua University,Beijing 100084,China [9]Yale School of Forestry and Environmental Studies,Yale University,New Haven,CT 06511,USA [10]Global Carbon Project,CSIRO Oceans and Atmosphere,Canberra ACT 2601,Australia [11]CICERO Center tor International Climate Research,Oslo 0349,Norway [12]Environmental Sciences Division and Climate Change Science Institute,Oak Ridge National Laboratory,Oak Ridge,TN 37831,USA [13]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University,Yangling 712100,China [14]Departmenl ot Earth Science,Vnje Universiteit Amsterdam,Amsterdam HV W81,The Netherlands [15]CSIR0 Oceans and Atmosphere,Canberra ACT 2601,Australia [16]Institute for Geology,CEN Center for Eanh System Research and Sustainability,University of Hamburg,Hamburg D-20146,Germany [17]Department ot Earth System Science,Stanford University,Stanford,CA 94305,USA [18]School of Geographical Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [19]Department of Ecological Sciences,Vrije Umversiteit Amsierdam,Amsterdam HV 1081,The Netherlands [20]Research Institute for Global Change,JAMSTEC,Kanagawa 236-0001,Japan [21]Center for Environmental Remote Sensing,Chiba University,Chiba 263-85

出　　处：《National Science Review》2021年第2期55-68,共14页国家科学评论（英文版）

基　　金：the European Research Council through Synergy grant ERC-2013-Sy G-610028‘IMBALANCEP’;supported by the Norwegian Research Council(236296);Support for the two initial workshops of RECCAP was provided by the EU FP7 project COCOS(212196);acknowledge NSF grants 1840243 and 1340749;support from the Australian Climate Change Science Program-Earth Systems and Climate Change Hub;‘Chercheur Qualifiédu F.R.S.-FNRS’at the UniversitéLibre de Bruxelles;funding from the Bureau des relations internationales(BRIC)of the ULB and the French National Research Agency(‘Investissement d’Avenir’,ANR-10-LABX-0018);supported by the German Research Foundation’s Emmy Noether Program;partly supported by the Environment Research and Technology Development Fund(2-1701)of the Ministry of the Environment,Japan;partly supported by the Russian Science Foundation(20-67-46018);support through the NASA Terrestrial Ecology Program;funded by NASA NNH16ZDA001N-IDS;supported by the MOPGA award with collaborators at LSCE;supported by RSF project#19-77-30012。

摘　　要：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 CO_(2)uptake of–2.2±0.6 Pg C yr^(-1)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 CO_(2)of 39 Pg C yr^(-1)with an interquartile of 33–46 Pg C yr^(-1)—a much smaller portion of net primary productivity than previously reported.

关 键 词：carbon budget human appropriation of ecosystems soil carbon 

分 类 号：X144[环境科学与工程—环境科学]