Fig. 6From: Estimating carbon sequestration in the piedmont ecoregion of the United States from 1971 to 2010Trends and spatial distribution of net primary productivity (NPP) and net biome productivity (NBP) in the Piedmont ecoregion between 1971 and 2010. The maps show the average over 40 years, expressed in kg C m−2 yr−1 Back to article page