Figure S10 Response of gross primary productivity to inter-product diffuse fraction spread for 2030-2039 period. Associations between gross primary productivity (GPP) and diffuse fraction (k d) across different land model simulations forced using k d from the six products (NCEP/NCAR, NOAA-CIRES-DOE, ERA5, MERRA-2, CERES, and CAM) considered in the present study for (a) all terrestrial surfaces, (b) tropical climate, (c) arid climate, (d) temperate climate, (e) boreal climate, and (f) polar climate for the 2030-2039 10-year period. The lines of best fit and the linear regression equations, with coefficient of determination r 2 and p-values are noted. For tropical and temperate climate, logarithmic fits and associated equations are also noted (in red). The vertical error bars show the inter-annual standard error for the 10-year period.