Solar-Induced Chlorophyll Fluorescence (SIF) as a Proxy of Canopy Photosynthesis for Crops in the U.S. Corn Belt
Research advisor: Dr. Kaiyu Guan
Recent advances in remotely sensed solar-induced chlorophyll fluorescence (SIF) have provided a promising opportunity for estimating gross primary production (GPP). However, the mechanistic relationships between SIF and GPP are not well understood. This study investigated canopy SIF-GPP relationships in three crops (corn, soybean and miscanthus) using long-term ground spectral and flux measurements combined with process-based model and auxiliary leaf-level measurements and assessed the role of canopy structure and leaf physiology in determining crop SIF-GPP relationships in the U.S. Corn Belt. It contributes to the mechanistic understanding of SIF as a proxy of crop, and ultimately, to predicting large-scale crop GPP.
