Per-cell areal cover fraction of the RESOLVE Ecoregions 2017 grassy biomes (Dinerstein et al. 2017): tropical and subtropical, temperate, flooded, and montane grasslands, savannas and shrublands (biomes 7-10). Used to correct the LPJmL-derived potential forest area, which overestimates forest cover in these open ecosystems, where tree planting and forest expansion are ecologically inappropriate (Veldman et al. 2015).