ChloFluo v01: Global model of gross primary production or photosynthesis using solar-induced chlorophyll fluorescence

Solar-induced chlorophyll fluorescence (SIF) contains information on leaf physiology and has been shown to be synchronous with photosynthetic activity. Here we present a new model of global photosynthesis, ChloFluo, which uses spaceborne SIF to estimate the amount of photosynthetically active radiation (PAR) absorbed by chlorophyll (APARchl). We model APARchl using its empirical relationship with SIF and the proportion of APARchl that is reemitted as SIF, or ΦF. ChloFluo v01 is provided here as a proof-of-concept version for the year 2019.