Global divergent responses of primary productivity to water, energy, and CO2

Zhiyong Liu, Lei Chen, Nicholas Smith, Wenping Yuan, Xiaohong Chen, Guoyi Zhou, Syed Ashraful Alam, Kairong Lin, Tongtiegang Zhao, Ping Zhou, Chengjin Chu, Hanqing Ma, Jianquan Liu

Research output: Contribution to journalArticlepeer-review

Abstract

The directionality of the response of gross primary productivity (GPP) to climate has been shown to vary across the globe. This effect has been hypothesized to be the result of the interaction between multiple bioclimatic factors, including environmental energy (i.e. temperature and radiation) and water availability. This is due to the tight coupling between water and carbon cycling in plants and the fact that temperature often drives plant water demand. Using GPP data extracted from 188 sites of FLUXNET2015 and observation-driven terrestrial biosphere models (TBMs), we disentangled the confounding effects of temperature, precipitation and carbon dioxide on GPP, and examined their long-term effects on productivity across the globe. Based on the FLUXNET2015 data, we observed a decline in the positive effect of temperature on GPP, while the positive effects of precipitation and CO2 were becoming stronger during 2000–2014. Using data derived from TBMs between 1980 and 2010 we found simil
Original languageEnglish
Pages (from-to)124044
JournalEnvironmental Research Letters
StatePublished - Dec 2019

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