Figure S1 Response of net ecosystem productivity to
inter-product diffuse fraction spread. Associations between net
ecosystem productivity (NEP) 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. The lines of best fit and the linear regression equations, with
coefficient of determination r 2 and p-values
are noted. The vertical error bars show the inter-annual standard error
for the 10-year period.