## 3 Results
### Land Cover Classification  
We obtained the pixel values within a range of 5 km \(\times\) 5 km centered over each site, as well as the numbers of corresponding pixel values from the MCD12Q1 image data during 2001-2013. MODIS land cover classification results at each site were then calculated from the statistics of the pixel values. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Biome (Site)** & **Comparison** & **R\({}^{2}\)** & **Mean (SD)** & **Bias** & **RMSE (\%)** & \(n\) \\ \hline
**ENF** & GLASS FPAR vs. MODIS FPAR & 0.72 ** & 0.511 (0.242) vs. 0.463 (0.239) & 0.048 & 26 & 917 \\ (AR-Vir) & GLASS FPAR vs. MODIS FPAR & 0.61 ** & 0.653 (0.155) vs. 0.615 (0.179) & 0.038 & 19 & 138 \\ (AU-ASM) & GLASS FPAR vs. MODIS FPAR & 0.44 ** & 0.169 (0.046) vs. 0.236 (0.067) & \(-\)0.067 & 36 & 184 \\ (IT-Ren) & GLASS FPAR vs. MODIS FPAR & 0.69 ** & 0.584 (0.195) vs. 0.497 (0.239) & 0.087 & 32 & 595 \\ \hline
**ERF** & GLASS FPAR vs. MODIS FPAR & 0.02 ** & 0.583 (0.237) vs. 0.499 (0.21) & 0.084 & 39 & 1099 \\ (AU-Vir) & GLASS FPAR vs. MODIS FPAR & 0.67 ** & 0.386 (0.204) vs. 0.476 (0.2) & \(-\)0.09 & 32 & 138 \\ (BR-Sa3) & GLASS FPAR vs. MODIS FPAR & 0.09 ** & 0.925 (0.008) vs. 0.633 (0.315) & 0.292 & 67 & 182 \\ (FR-Pue) & GLASS FPAR vs. MODIS FERR & 0.03 ** & 0.437 (0.055) vs. 0.499 (0.083) & \(-\)0.062 & 22 & 595 \\ (GI-Ank) & GLASS FERR vs. MODIS FERR & - & 0.864 (0.028) vs. 0.385 (0.288) & 0.479 & 145 & 184 \\ \hline
**DEF** & GLASS FPAR vs. MODIS FERR & 0.55 ** & 0.588 (0.213) vs. 0.472 (0.268) & 0.116 & 39 & 1100 \\ (DE-Hai) & GLASS FERR vs. MODIS FERR & 0.49 ** & 0.598 (0.19) vs. 0.498 (0.269) & 0.1 & 43 & 550 \\ (DK-Sor) & GLASS FERR vs. MODIS FERR & 0.61 ** & 0.578 (0.234) vs. 0.445 (0.264) & 0.133 & 48 & 550 \\ \hline
**MF** & GLASS FPAR vs. MODIS FERR & 0.46 ** & 0.608 (0.167) vs. 0.512 (0.271) & 0.096 & 37 & 1193 \\ (BE-Vie) & GLASS FERR vs. MODIS FERR & 0.305 ** & 0.406 (0.154) vs. 0.52 (0.282) & 0.086 & 47 & 641 \\ (CA-Gro) & GLASS FERR vs. MODIS FERR & 0.62 ** & 0.611 (0.181) vs. 0.503 (0.256) & 0.108 & 38 & 552 \\ \hline
**GRA** & GLASS FPAR vs. MODIS FERR & 0.49 ** & 0.393 (0.308) vs. 0.368 (0.245) & 0.025 & 57 & 1054 \\ (AU-Rig) & GLASS FERR vs. MODIS FERR & 0.56 ** & 0.419 (0.223) vs. 0.514 (0.228) & \(-\)0.095 & 36 & 138 \\ (C-2R2) & GLASS FERR vs. MODIS FERR & 0.57 ** & 0.619 (0.23) vs. 0.497 (0.312) & 0.122 & 48 & 276 \\ (PA-SPs) & GLASS FERR vs. MODIS FERR & - & 0.835 (0.207) vs. 0.46 (0.183) & 0.375 & 91 & 138 \\ (US-Wkg) & GLASS FERR vs. MODIS FERR & 0.46 ** & 0.141 (0.1) vs. 0.231 (0.117) & \(-\)0.09 & 55 & 502 \\ \hline
**CRO** & GLASS FPAR vs. MODIS FERR & 0.58 ** & 0.552 (0.198) vs. 0.456 (0.219) & 0.096 & 31 & 1148 \\ (BE-Lon) & GLASS FERR vs. MODIS FERR & 0.46 ** & 0.537 (0.165) vs. 0.42 (0.194) & 0.117 & 45 & 505 \\ (FR-Gri) & GLASS FERR vs. MODIS FERR & 0.50 ** & 0.614 (0.184) vs. 0.53 (0.211) & 0.084 & 33 & 505 \\ (US-CRT) & GLASS FERR vs. MODIS FERR & 0.84 ** & 0.378 (0.242) vs. 0.314 (0.231) & 0.064 & 37 & 138 \\ \hline \end{tabular} Significance levels: \({}^{n}\) \(p\) \(<\) 0.01.  
\end{table} 
Table 4: Comparison of the FPAR derived from the GLASS LAI datasets (GLASS FPAR) with those from the MOD15A2H products (MODIS FPAR) for various biomes. ENF: evergreen needleleaf forests; EBF: evergreen broadleaf forests; DBF: deciduous broadleaf forests; MF: mixed forests; GRA: grasslands; CRO: croplands. Figure 5: Comparison of the average FPAR from the GLASS LAI datasets (GLASS FPAR) and the MOD15A2H products (MODIS FPAR). Significance levels: \({}^{**}\)\(p\) \(<\) 0.01. Additionally, the actual land cover type of each site was obtained by consulting site descriptions provided by the FLUXNET2015 dataset. We also compared MODIS land cover classification results and actual land cover types in this study (Figure 6). It was found that MCD12Q1 misclassified eleven of the eighteen sites.