The Respective Effects of Vapor Pressure Deficit and Soil Moisture on Ecosystem Productivity in Southwest China

• DOI: 10.3390/rs16081316
• Publication Date: 2024-04-09T12:55:12Z
• Authors: Xupeng Sun; Yao Xiao; Jinghan Wang; Miaohang Zhou; Zengjing Song; Mingguo Ma; Xujun Han
• Keywords: SIF; Science; Q; 0207 environmental engineering; drought; 02 engineering and technology; soil moisture; vapor pressure difference

This study aims to examine the individual and combined effects of soil moisture (SM) vapor pressure deficit (VPD) on ecosystem productivity in Southwest China. Utilizing community land model (CLM) simulate regional deficit, we analyzed their impacts through a data binning approach employed sun-induced chlorophyll fluorescence yield (SIFyield) as indicator. Our findings highlight significant coupling effect between SM VPD, which diminishes with finer temporal resolution. The analysis indicates that VPD has predominant influence SIFyield across 70% area, whereas is more influential remaining 30%. Notably, correlation SM, modulated by stronger forest shrubland ecosystems, grasslands, pattern reversed, having impact. concludes China, significantly affected than SM.