Means and ranges of R2 values across continents for (quadratic) relationships between NDVI and MODIS-NPP per biome.

Relationships were developed for each continent separately, shown here for the annual sum (AS), large seasonal integral (LI) and April-October (AO) NDVI metrics. For each biome, the overall best performing GIMMS3g NDVI metric (including January-June, JJ) is listed.