3.2.3. Spatial Correlation of Four LAI Climatologies

The spatial correlations among each pair of LAI products are shown in the density scatter plots in Figure 9. Different colors represent different levels of scatter numbers in each bin. As we can see from all six pairs, a greater density represents a larger concentration. And the densest values mainly occur with small LAI values. There are four pairs of the six have high correlation with *R*<sup>2</sup> > 0.72 (Figure 9a–e), and two pairs have moderate correlation with *R*<sup>2</sup> = 0.58 and 0.61, corresponding to GLOBMAP vs. MODIS and GLOBMAP vs. GLOBALBNU (Figure 9c,f). Compared with MODIS LAI, the correlation can be ordered by GLOBALBNU, GLASS, and CLOBMAP LAI.

**Figure 9.** Density scatter plots of each pair of LAI products: (**a**) GLASS vs. MODIS; (**b**) GLOBALBNU vs. MODIS; (**c**) GLOBMAP vs. MODIS; (**d**) GLASS vs. GLOBALBNU; (**e**) GLASS vs. GLOBMAP; (**f**) GLOBALBNU vs. GLOBMAP.
