The net radiation at the top of the atmosphere is a measure of the incomming shortwave (solar) radiation minus the sum of the outgoing shortwave (reflected solar) radiation and the outgoing longwave (thermal) radiation.
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Annual (12 month running mean)  Top of Atmosphere Net Radiation (W m^(-2)) gif ps  | 
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Seasonal Net Radiation Flux at  the Top of the Atmosphere (W m^(-2)) gif ps  |