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

作     者：Bin He Chen Chen Shangrong Lin Wenping Yuan Hans W.Chen Deliang Chen Yafeng Zhang Lanlan Guo Xiang Zhao Xuebang Liu Shilong Piao Ziqian Zhong Rui Wang Rui Tang Bin He;Chen Chen;Shangrong Lin;Wenping Yuan;Hans W.Chen;Deliang Chen;Yafeng Zhang;Lanlan Guo;Xiang Zhao;Xuebang Liu;Shilong Piao;Ziqian Zhong;Rui Wang;Rui Tang

作者机构：State Key Laboratory of Earth Surface Processes and Resource EcologyCollege of Global Change and Earth System ScienceBeijing Normal University Department of Application ResearchTwenty First Century Aerospace Technology Co.Ltd. School of Atmospheric SciencesSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Sun Yat-sen University Department of Physical Geography and Ecosystem ScienceLund University Regional Climate GroupDepartment of Earth SciencesUniversity of Gothenburg Academy of Disaster Reduction and Emergency ManagementSchool of GeographyBeijing Normal University State Key Laboratory of Remote Sensing ScienceFaculty of Geographical ScienceBeijing Normal University Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencesPeking University 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2022年第9卷第4期

页      面：33-40页

核心收录：

学科分类：07[理学] 0706[理学-大气科学] 0713[理学-生态学] 

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) 

主　　题：vapor pressure deficit net ecosystem production gross vegetation production carbon dioxide concentration 

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(CO2) 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 CO2growth 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.