Fig. 3

Spatial variability of HG-Land ET accuracy across different sites compared to FLUXNET observations. (a) R; (b) RMSE; (c) MAE; (d) RB. The inset figure shows the frequency distribution histogram of each metric. The flux sites US-Wi1, US-Wi7, and US-Wi9 were omitted from the figure due to a limited availability of valid data records from these sites.