Net annual flux for 2000

Climatological mean annual sea-air CO2 flux (moles CO2 m-2 yr-1) for the reference year 2000 (non-El Nino conditions). The map is based on 2.791 million surface water pCO2 measurements obtained since 1970. Wind speed data from the 1979-2005 NCEP-DOE AMIP-II Reanalysis (R-2) and the gas transfer coefficient with a scaling factor of 0.24 are used. This yields a net global air-to-sea flux of 1.22 Pg-C yr-1.


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