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

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外文摘要：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 CO2 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 in-teractions into ESMs enhances the prediction of terrestrial ecosystem responses to climate change.

外文关键词：

atmospheric water demandssoil moisturestomatal conductancephotosynthesisclimate warming

作者：

Chao Huang、Jingfeng Huang、Jingfeng Xiao、Xing Li、Hong S.He、Yu Liang、Fusheng Chen、Hanqin Tian

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作者单位：

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

CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China

Institute of Applied Remote Sensing & Information Technology,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China

Key Laboratory of Agricultural Remote Sensing and Information Systems,Zhejiang Province,Zhejiang University,Hangzhou 310058,China

Earth Systems Research Center,Institute for the Study of Earth,Oceans,and Space,University of New Hampshire,Durham NH 03824,USA

Research Institute of Agriculture and Life Sciences,Seoul National University,Seoul 08826,South Korea

School of Natural Resources,University of Missouri,203 ABNR Building,Columbia,M0 65211,USA

Schiller Institute for Integrated Science and Society,Department of Earth and Environmental Sciences,Boston College,Chestnut Hill,MA 02467,USA

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基金：

Chinese National Science Foundational ProjectChinese National Science Foundational ProjectChinese National Science Foundational ProjectNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaJIANGXI DOUBLE THOUSAND PLANSNatural Science Foundation of Jiangxi provinceUniversity of New Hampshire

项目编号：

3216029232171759319300702017YFA06044032016YFA0600804jxsq202010108020224BAB205008

出版年：

2024

DOI：

10.1007/s11427-023-2475-9

中国科学:生命科学(英文版)

中国科学院

中国科学:生命科学(英文版)

CSTPCD

影响因子：0.806

ISSN：1674-7305

年,卷(期)：2024.67(9)