A Comparison Study of the Climatological Air-Sea Heat Fluxes Estimated by Different Computational Schemes of Bulk Formula

Fu Congbin; Robert Pyle; Fan Huijun

doi:10.1007/BF02666545

Impact Factor: 6.5

Volume 11 Issue 2

Apr. 1994

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1994 > 11(2): 189-200

A Comparison Study of the Climatological Air-Sea Heat Fluxes Estimated by Different Computational Schemes of Bulk Formula

1.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100080,C1RES, University of Colorado, CO 80309 U.S.A,State Meteorological Administration, Beijing 100081

doi: 10.1007/BF02666545

Abstract
References
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Abstract:
In this paper the different results of estimated air-sea heat fluxes by different computational schemes of bulk formula are researched. The varying results may bring another source of the uncertainties of flux climatology.In addition to the classical scheme and the sampling scheme, a revised sampling scheme named semi-sampling scheme is proposed in this paper. In this revised version, the monthly means of and are cal?culated from each simultaneous measurement as that in the sampling method. But the transfer coefficients in this version are defined based on monthly means of and instead of those in each measurement in older to use the files of monthly mean variables and in COADS (Woodruff et al. 1987).The results of a comparison study show that the covariance between and and that between and are less than 2 W / m2 and 5 W / m2 respectively in most areas, which are about one order of magni?tude less than the standard deviation of the fluxes. Therefore the difference between two schemes is not statistically significant on average. However, in the regions off coast of Asian and North American continents, the contribution of covariance between and can be as large as 15 W / m2, which is about one third to a half of the standard deviation. Since there are files of monthly mean and for each year in the COADS, we pro?pose to use these files directly in calculation of climatology. It is not necessary to use every individual report.The flux climatology calculated directly from the long-term mean values of basic meteorological elements shows an significant difference from that calculated from the mean of each year’s flux, particularly for the latent heat flux which is on the order of 10 to 15 W / m2, about 3-4 times of the difference between semi-sampling and classical schemes and about one third of the standard deviation. Therefore it indicates that the time interval of months is per?haps a better one in the calculation of flux climatology. It is not recommended to use the long-term means of the me?teorological variables.
- Air-sea heat flux,
- Bulk fomula
References

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Manuscript History

Manuscript received: 10 April 1994

Manuscript revised: 10 April 1994

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A Comparison Study of the Climatological Air-Sea Heat Fluxes Estimated by Different Computational Schemes of Bulk Formula

1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100080,C1RES, University of Colorado, CO 80309 U.S.A,State Meteorological Administration, Beijing 100081

Manuscript received: 1994-04-10
Manuscript revised: 1994-04-10

Abstract: In this paper the different results of estimated air-sea heat fluxes by different computational schemes of bulk formula are researched. The varying results may bring another source of the uncertainties of flux climatology.In addition to the classical scheme and the sampling scheme, a revised sampling scheme named semi-sampling scheme is proposed in this paper. In this revised version, the monthly means of and are cal?culated from each simultaneous measurement as that in the sampling method. But the transfer coefficients in this version are defined based on monthly means of and instead of those in each measurement in older to use the files of monthly mean variables and in COADS (Woodruff et al. 1987).The results of a comparison study show that the covariance between and and that between and are less than 2 W / m2 and 5 W / m2 respectively in most areas, which are about one order of magni?tude less than the standard deviation of the fluxes. Therefore the difference between two schemes is not statistically significant on average. However, in the regions off coast of Asian and North American continents, the contribution of covariance between and can be as large as 15 W / m2, which is about one third to a half of the standard deviation. Since there are files of monthly mean and for each year in the COADS, we pro?pose to use these files directly in calculation of climatology. It is not necessary to use every individual report.The flux climatology calculated directly from the long-term mean values of basic meteorological elements shows an significant difference from that calculated from the mean of each year’s flux, particularly for the latent heat flux which is on the order of 10 to 15 W / m2, about 3-4 times of the difference between semi-sampling and classical schemes and about one third of the standard deviation. Therefore it indicates that the time interval of months is per?haps a better one in the calculation of flux climatology. It is not recommended to use the long-term means of the me?teorological variables.

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