Comparisons of FPAR derived from GIMMS AVHRR NDVI and MODIS product

This study presents a comparison of FPAR derived from GIMMS NDVI and MODIS product, as the preparation research for generating the global FPAR from 1981 to present. Eurasia was selected as the study area. First, we estimated FPAR in 2006 by the NDVI-based approach, and then we compared the spatial and seasonal patterns of estimating FPAR with the MODIS standard product. The results showed that: the GIMMS NDVI SR FPAR show the consistent dynamics spatial and seasonal dynamics with MODIS FPAR, and two datasets capture the seasonal variation well. MODIS FPAR values are larger than GIMMS NDVI SR FPAR, especially for the forest vegetation. The differences among of two datasets can also be partly attributed to the biome specific MODIS algorithm and NDVI-based approach in this study.