Global convergence in terrestrial gross primary production response to atmospheric vapor pressure deficit  

作　　者：Chao Huang Jingfeng Huang Jingfeng Xiao Xing Li Hong SHe Yu Liang Fusheng Chen Hanqin Tian 

机构地区：[1]Key Laboratory of National Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed,College of Forestry,Jiangxi Agricultural University,Nanchang 330045,China [2]CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China [3]Institute of Applied Remote Sensing&Information Technology,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China [4]Key Laboratory of Agricultural Remote Sensing and Information Systems,Zhejiang Province,Zhejiang University,Hangzhou 310058,China [5]Earth Systems Research Center,Institute for the Study of Earth,Oceans,and Space,University of New Hampshire,Durham NH 03824,USA [6]Research Institute of Agriculture and Life Sciences,Seoul National University,Seoul 08826,South Korea [7]School of Natural Resources,University of Missouri,203 ABNR Building,Columbia,MO 65211,USA [8]Schiller Institute for Integrated Science and Society,Department of Earth and Environmental Sciences,Boston College,Chestnut Hill,MA 02467,USA

出　　处：《Science China(Life Sciences)》2024年第9期2016-2025,共10页中国科学（生命科学英文版）

基　　金：supported by the Chinese National Science Foundational Project(32160292,32171759,and 31930070);the National Key Research and Development Program of China(2017YFA0604403 and 2016YFA0600804);JIANGXI DOUBLE THOUSAND PLANS(jxsq2020101080);the Natural Science Foundation of Jiangxi province(20224BAB205008);supported by University of New Hampshire。

摘　　要：Atmospheric vapor pressure deficit(VPD)increases with climate warming and may limit plant growth.However,gross primary production(GPP)responses to VPD remain a mystery,offering a significant source of uncertainty in the estimation of global terrestrial ecosystems carbon dynamics.In this study,in-situ measurements,satellite-derived data,and Earth System Models(ESMs)simulations were analysed to show that the GPP of most ecosystems has a similar threshold in response to VPD:first increasing and then declining.When VPD exceeds these thresholds,atmospheric drought stress reduces soil moisture and stomatal conductance,thereby decreasing the productivity of terrestrial ecosystems.Current ESMs underscore CO_(2) fertilization effects but predict significant GPP decline in low-latitude ecosystems when VPD exceeds the thresholds.These results emphasize the impacts of climate warming on VPD and propose limitations to future ecosystems productivity caused by increased atmospheric water demand.Incorporating VPD,soil moisture,and canopy conductance interactions into ESMs enhances the prediction of terrestrial ecosystem responses to climate change.

关 键 词：atmospheric water demands soil moisture stomatal conductance PHOTOSYNTHESIS climate warming 

分 类 号：Q948[生物学—植物学] X171.1[环境科学与工程—环境科学]