Estimate of Global Sea-Air CO2 Flux with Sea-State-Dependent Parameterization |
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| Authors: | HU Wei GUAN Changlong |
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| Institution: | 1. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, P. R. China;North China Sea Marine Forecast Center, State Oceanic Administration, Qingdao 266033, P. R. China
2. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, P. R. China |
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| Abstract: | Although the annual global sea-air CO2 flux has been estimated extensively with various wind-dependent-k parameteri- zations, uncertainty still exists in the estimates. The sea-state-dependent-k parameterization is expected to improve the uncertainty existing in these estimates. In the present study, the annual global sea-air CO2 flux is estimated with the sea-state-dependent-k parameterization proposed by Woolf (2005), using NOAA/NCEP reanalysis wind speed and hindcast wave data from 1998 to 2006, and a new estimate, -2.18 Gt C year-1, is obtained, which is comparable with previous estimates with biochemical methods. It is in- teresting to note that the averaged value of previous estimates with various wind-dependent-k parameterizations is almost identical to that of previous estimates with biochemical methods by various authors, and that the new estimate is quite consistent with these av- eraged estimates. |
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| Keywords: | sea-air CO2 exchange global CO2 flux gas transfer velocity sea-state wave development status |
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