The development of mesoscale circulation depends on the length scale of the land heterogeneity. Mesoscale circulation is sensitive to spatial scale and is typically generated at scales of 10-100 km 16,41 . To investigate the sensitivity of cloud inhibition effect induced by mesoscale circulation to spatial scale, we reestimated ΔCloud using MODIS cloud **data** resampled to different spatial resolutions. We find that with reduced resolutions of cloud data, the spatial coverage of cloud inhibition shrinks from~37% at 0.05°to~24-28% at 1°, while cloud enhancement becomes more dominant (from 63% to~76-72%) (Supplementary Fig. 12 and Supplementary Table 2). This implies that at coarser scales (e.g., typical GCM spatial resolutions), at which mesoscale processes become less important (i.e., less cloud inhibition), observation-and model-based results tend to converge on cloud enhancement of forests.