Abstract
Precise measurements of the CO2 gas transfer across the air-sea interface provide a better understanding of the global carbon cycle. The air-sea CO2 fluxes are obtained by the eddy covariance method and the bulk method from a buoy observation in the northern Huanghai sea. The effects of buoy motion on flux calculated by the eddy covariance method are demonstrated. The research shows that a motion correction can improve the correlation coefficient between the CO2 fluxes estimated from two different levels. Without the CO2-H2O cross-correlation correction which is termed as PKT correction, the air-sea CO2 fluxes estimated by eddy covariance method using the motion corrected data are nearly an order of magnitude larger than those estimated by the bulk method. After the CO2-H2O cross-correlation correction, some eddy covariance CO2 fluxes indeed become closer to the bulk CO2 flux, whereas some are overcorrected which are in response to small water vapor flux.
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Foundation item: The National Basic Research Program of China under contract No. 2011CB403501; the Public Science and Technology Research Funds Projects of Ocean of the State oceanic Administration of China under contract No. 200905012-9; the Fund for Creative Research Groups by the National Natural Science Foundation of China under contract No. 41121064; and the Open Research Foundation for the key Laboratory of Ocean Circulation and Waves. Institute of Oceanology, Chinese Academy of Sciences of China under contract No.KLOCAW1207.
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Huang, Y., Song, J., Wang, J. et al. Air-sea carbon-dioxide flux estimated by eddy covariance method from a buoy observation. Acta Oceanol. Sin. 31, 66–71 (2012). https://doi.org/10.1007/s13131-012-0253-5
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DOI: https://doi.org/10.1007/s13131-012-0253-5