主讲：郑一琦，University of Alaska Fairbanks
Atmospheric oxidation of isoprene emission from land plants affects atmospheric chemistry and climate. There is an urgent need to understand the factors controlling isoprene emission variability on large spatiotemporal scales but such direct observations do not exist. Photosynthesis and atmospheric HCHO both hold information for isoprene variability but neither is a perfect proxy. By integrating in-situ and satellite measurements and a global chemistry-climate model, we investigated the interactive relationships between photosynthesis, isoprene emission and HCHO columns, with a focus on their responses to heat and drought stresses. We also developed the first semi-empirical isoprene emission model based on satellite solar-induced fluorescence, which is an important supplement to current commonly used methods.