FIG. 48.18 Primary production on land. High rates of primary production occur where climates are warm and wet. Data from W. Cramer et al., 1999, “Comparing Global Models of Terrestrial Net Primary Productivity (NPP): Overview and Key Results,” Global Change Biology 5 (Supplement 1): 1–15.

Data from W. Cramer et al., 1999, “Comparing Global Models of Terrestrial Net Primary Productivity (NPP): Overview and Key Results,” Global Change Biology 5 (Supplement 1): 1–15.