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

• DOI: 10.1088/1748-9326/ab57c5
• Publication Date: 2019-11-14T23:00:20Z
• Authors: Zhiyong Liu; Lei Chen; Nicholas G Smith; Wenping Yuan; Xiaohong Chen; Guoyi Zhou; Syed Ashraful Alam; Kairong Lin; Tongtiegang Zhao; Ping Zhou; Chengjin Chu; Hanqing Ma; Jianquan Liu
• Keywords: Growing season

Abstract The directionality of the response gross primary productivity (GPP) to climate has been shown vary across globe. This effect hypothesized be result interaction between multiple bioclimatic factors, including environmental energy (i.e. temperature and radiation) water availability. is due tight coupling carbon cycling in plants fact that often drives plant demand. Using GPP data extracted from 188 sites FLUXNET2015 observation-driven terrestrial biosphere models (TBMs), we disentangled confounding effects temperature, precipitation dioxide on GPP, examined their long-term Based data, observed a decline positive while CO 2 were becoming stronger during 2000–2014. derived TBMs 1980 2010 found similar globally. modeled allowed us investigate these more thoroughly over space time. In arid regions, increased since 1950, approximately 30 years earlier than humid regions. We further negative summer suggesting greater aridity stress under global warming. Our results imply stress, triggered by rising temperatures, reduced influence elevated may alleviate impacts.