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neutral biosphere
The NEP maps come from a steady-state CASA model run. These maps were used in Randerson et al., "The contribution of terrestrial sources and sinks to trends in the seasonal cycle of atmospheric carbon dioxide," Global Biogeochem. Cycles, 11, 535-560, 1997.
Contact Jim Randerson, for more information.
The 1995 emissions map The original 1 x 1 degree maps were subsampled to 0.5 x 0.5 degree maps in which the first grid cell is centered at 89.75 S latitude, 179.75 W longitude, proceeding in the longitudinal direction.
The neutral biospheric CO2 exchange for July and December are shown below:
 
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