Fig. 1: Effects of soil moisture (SM) and vapor pressure deficit (VPD) on photosynthetically active radiation (PAR) and fraction of photosynthetically active radiation absorbed by plants (fPAR) globally.
From: Large influence of atmospheric vapor pressure deficit on ecosystem production efficiency
a, b Indicate the spatial distribution of the changes in PAR caused by high VPD (ΔPAR(VPD|SM)) and low soil moisture (SM) (ΔPAR(SM|VPD)), and c shows the probability density function of ΔPAR. d–f Indicate the corresponding changes of fPAR. For better comparability in space, the PAR and fPAR data time series were normalized by the average exceeding 90th percentile per pixel. The units refer to the fractions relative to average PAR and fPAR exceeding the 90th percentile in each grid cell. Regions with sparse vegetation and regions without valid data are masked in white.
