Estimate of global sea-air CO2 flux with sea-state-dependent parameterization |
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Authors: | Wei Hu Changlong Guan |
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Affiliation: | (1) Physical Oceanography Laboratory, Ocean University of China, Qingdao, 266003, P. R. China;(2) North China Sea Marine Forecast Center, State Oceanic Administration, Qingdao, 266033, 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 parameterizations, 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 interesting 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 averaged 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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