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Worldwide impacts of atmospheric vapor pressure deficit on the interannual variability of terrestrial carbon sinks

查看全文 作　　者：Bin [1]He;Chen [2]Chen;Shangrong [3]Lin;Wenping [3]Yuan;Hans [4]WChen;Deliang [5]Chen;Yafeng [1]Zhang;Lanlan [1,6]Guo;Xiang [7]Zhao;Xuebang [1]Liu;Shilong [8]Piao;Ziqian [1]Zhong;Rui [1]Wang;Rui [1]Tang 高影响力作者 机构地区：[1]State Key Laboratory of Earth Surface Processes and Resource Ecology,College of Global Change and Earth System Science,Beijing Normal University,Beijing 100875,China;[2]Department of Application Research,Twenty First Century Aerospace Technology Co.,Ltd.,Beijing 100723,China;[3]School of Atmospheric Sciences,Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Sun Yat-sen University,Zhuhai 519082,China;[4]Department of Physical Geography and Ecosystem Science,Lund University,Lund S-22364,Sweden;[5]Regional Climate Group,Department of Earth Sciences,University of Gothenburg,Gothenburg S-40530,Sweden;[6]Academy of Disaster Reduction and Emergency Management,School of Geography,Beijing Normal University,Beijing 100875,China;[7]State Key Laboratory of Remote Sensing Science,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;[8]Sino-French Institute for Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China高影响力机构 出　　处：《National Science Review》索引2022年第9卷第4期,共8页高影响力期刊 基　　金：supported by the National Key Scientific Research and Development Program of China(2017YFA0603601and 2018YFC1508901);the Strategic Priority Research Program of Chinese Academy of Sciences(XDA20060402);Swedish Formas(2017-01408)。 摘　　要：Interannual variability of the terrestrial ecosystem carbon sink is substantially regulated by various environmental variables and highly dominates the interannual variation of atmospheric carbon dioxide(CO_(2))concentrations.Thus,it is necessary to determine dominating factors affecting the interannual variability of the carbon sink to improve our capability of predicting future terrestrial carbon sinks.Using global datasets derived from machine-learning methods and process-based ecosystem models,this study reveals that the inter annual variability of the atmospheric vapor pressure deficit(VPD)was significantly negatively correlated with net ecosystem production(NEP)and substantially impacted the inter annual variability of the atmospheric CO_(2)growth rate(CGR).Further analyses found widespread constraints of VPD interannual variability on terrestrial gross primary production(GPP),causing VPD to impact NEP and CGR.Partial correlation analysis confirms the persistent and widespread impacts of VPD on terrestrial carbon sinks compared to other environmental variables.Current Earth system models underestimate the interannual variability in VPD and its impacts on GPP and NEP.Our results highlight the importance of VPD for terrestrial carbon sinks in assessing ecosystems'responses to future climate conditions. 关 键 词：vapor pressure deficit net ecosystem production gross vegetation production carbon dioxide concentration
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