Estimating global transpiration from TROPOMI SIF with angular normalization and separation for sunlit and shaded leaves

Gross primary productivity (GPP) is more accurately estimated by total canopy solar-induced chlorophyll fluorescence ( SIF total ) compared to raw sensor observed SIF signals ( SIF obs ). The use of two-leaf strategy, which distinguishes between SIF from sunlit ( SIF sunlit ) and shaded ( SIF shaded ) leaves, further improves GPP estimates. However, the two-leaf strategy, along with SIF corrections for bidirectional effects, has not been …