Evaluating simulated vegetation variables using solar-induced fluorescence observations from Sentinel-5P

Vegetation gross primary production (GPP) and LAI simulations were compared with gridded TROPOMI solar-induced fluorescence SIF observations at 0.1°x0.1°, which was the native resolution of the model. To assess the correlation between GPP analysis, LAI analysis and SIF observations, temporal correlation coefficients with SIF were calculated for GPP and LAI over the entire domain from 1 May 2018 to 31 December 2020. When comparing the analysed LAI derived from the analysis with the SIF product, the relationship with SIF was generally better than with GPP across Europe.