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Journal Articles Science Advances Year : 2019

Increased atmospheric vapor pressure deficit reduces global vegetation growth

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Wenping Yuan
Shilong Piao
Guixing Chen
  • Function : Author
Wenjie Dong
  • Function : Author
Zhongming Hu
  • Function : Author
Atul Jain
Etsushi Kato
Shihua Li
Julia E.M.S. Nabel
  • Function : Author
Zhangcai Qin
  • Function : Author
Timothy Quine
  • Function : Author
Stephen Sitch
Chaoyang Wu

Abstract

Atmospheric vapor pressure deficit (VPD) is a critical variable in determining plant photosynthesis. Synthesis of four global climate datasets reveals a sharp increase of VPD after the late 1990s. In response, the vegetation greening trend indicated by a satellite-derived vegetation index (GIMMS3g), which was evident before the late 1990s, was subsequently stalled or reversed. Terrestrial gross primary production derived from two satellite-based models (revised EC-LUE and MODIS) exhibits persistent and widespread decreases after the late 1990s due to increased VPD, which offset the positive CO 2 fertilization effect. Six Earth system models have consistently projected continuous increases of VPD throughout the current century. Our results highlight that the impacts of VPD on vegetation growth should be adequately considered to assess ecosystem responses to future climate conditions.
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Dates and versions

hal-02895182 , version 1 (27-10-2020)

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Wenping Yuan, Yi Zheng, Shilong Piao, Philippe Ciais, Danica Lombardozzi, et al.. Increased atmospheric vapor pressure deficit reduces global vegetation growth. Science Advances , 2019, 5 (8), pp.1396-1-12. ⟨10.1126/sciadv.aax1396⟩. ⟨hal-02895182⟩
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