● The photosynthetic pathway (C3, C4) impacts the relationship between CO2 uptake and SIF, which helps to interpret satellite signals.
● TROPOMI SIF agrees well with the seasonality of crop gross primary production (GPP) when accounting for C3/C4 fractionation.
● TROPOMI SIF is highly correlated with USDA reported crop productivity at the county scale.
He, L., Magney, T., Dutta, D., Yin, Y., Köhler, P., Grossmann, K., et al. ( 2020). From the ground to space: Using solar‐induced chlorophyll fluorescence (SIF) to estimate crop productivity. Geophysical Research Letters, 47, e2020GL087474. https://doi.org/10.1029/2020GL087474