Increased atmospheric vapor pressure deficit reduces global vegetation growth

Wenping Yuan, Yi Zheng, Shilong Piao, Philippe Ciais, Danica Lombardozzi, Yingping Wang, Youngryel Ryu, Guixing Chen, Wenjie Dong, Zhongming Hu, Atul K. Jain, Chongya Jiang, Etsushi Kato, Shihua Li, Sebastian Lienert, Shuguang Liu, Julia E.M.S. Nabel, Zhangcai Qin, Timothy Quine, Stephen SitchWilliam K. Smith, Fan Wang, Chaoyang Wu, Zhiqiang Xiao, Song Yang

Research output: Contribution to journalArticlepeer-review

260 Scopus citations

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 CO2 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.

Original languageEnglish (US)
Article numbereaax1396
JournalScience Advances
Volume5
Issue number8
DOIs
StatePublished - Aug 14 2019
Externally publishedYes

ASJC Scopus subject areas

  • General

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