Altered trends in carbon uptake in China’s terrestrial ecosystems under the enhanced summer monsoon and warming hiatus

查看全文 作　　者：Honglin [1,2]He;Shaoqiang [1,2]Wang;Li [1,2]Zhang;Junbang [1]Wang;Xiaoli [1]Ren;Lei [1]Zhou;Shilong [3,4]Piao;Hao [5]Yan;Weimin [6]Ju;Fengxue [7]Gu;Shiyong [8]Yu;Yuanhe [9,10]Yang;Miaomiao [1,10]Wang;Zhongen [1,10]Niu;Rcmg [1,10]Ge;Huimin [1,2]Yan;Mei [1]Huang;Guoyi [11]Zhou;Yongfei [9]Bai;Zongqiang [9]Xie;Zhiyao [12]Tang;Bingfang [13]Wu;Leiming [1,2]Zhang;Nianpeng [1,2]He;Qiufeng [1,2]Wang;Guirui [1,2]Yu

机构地区：[1]Synthesis Research Center of China's Ecosystem Research Network,Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;[10]University of Chinese Academy of Sciences,Beqing 100049,China;[11]Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;[12]Department of Ecology,College of Urban and Environmental Science,Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking Universitv,Beijing 100871,China;[13]Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China;[2]College of Resources and Environment University of Chinese Academy of Sciences,Beijing 100190,China;[3]Sino-French Institute for Earth System Science,College of Urban and Environment Sciences,Peking University,Beijing 100871,China;[4]Key Laboratory of Alpine Ecology and Biodiversity Institute of Tibetan Plateau Research,CAS Center foi Excellence in Tibetan Plateau Earth Science,Chinese Academy of Sciences,Beijing 100085,China;[5]National Meteorological Center,China Meteorological Administration,Beijing 100081,China;[6]International Institute for Earth System Science and Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Nanjing University,Nanjing210023,China;[7]Key Laboratory of Dryland Agriculture,MOA,Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beipng 100081,China;[8]School of Geography,Geomatics,and Planning,Jiangsu Normal University,Xuzhou 221116,China;[9]State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China

出　　处：《National Science Review》索引2019年第6卷第3期,共10页

基　　金：supported by the National Key R&D Program of China(2016YFC0500200);the Strategic Priority Research Program of Chinese Academy of Sciences(XDA05050000,XDA19020301) 摘　　要：The carbon budgets in terrestrial ecosystems in China are strongly coupled with climate changes.Over the past decade,China has experienced dramatic climate changes characterized by enhanced summer monsoon and decelerated warming.However,the changes in the trends of terrestrial net ecosystem production(NEP)in China under climate changes are not well documented.Here,we used three ecosystem models to simulate the spatiotemporal variations in China's NEP during 1982–2010 and quantify the contribution of the strengthened summer monsoon and warming hiatus to the NEP variations in four distinct climatic regions of the country.Our results revealed a decadal-scale shift in NEP from a downtrend of–5.95 Tg C/yr^2(reduced sink)during 1982–2000 to an uptrend of 14.22 Tg C/yr^2(enhanced sink)during 2000–10.This shift was essentially induced by the strengthened summer monsoon,which stimulated carbon uptake,and the warming hiatus,which lessened the decrease in the NEP trend.Compared to the contribution of 56.3%by the climate effect,atmospheric CO2 concentration and nitrogen deposition had relatively small contributions(8.6 and 11.3%,respectively)to the shift.In conclusion,within the context of the global-warming hiatus,the strengthening of the summer monsoon is a critical climate factor that enhances carbon uptake in China due to the asymmetric response of photosynthesis and respiration.Our study not only revealed the shift in ecosystem carbon sequestration in China in recent decades,but also provides some insight for understanding ecosystem carbon dynamics in other monsoonal areas. 关键词：climate change Asian summer MONSOON WARMING HIATUS BIOGEOCHEMICAL modeling ecosystem carbon dynamics

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Altered trends in carbon uptake in China’s terrestrial ecosystems under the enhanced summer monsoon and warming hiatus

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