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Comments on ““On the Estimation of Overwater Bowen Ratio from Sea––Air Temperature Difference”” **

Comments on ““On the Estimation of Overwater Bowen Ratio from Sea––Air Temperature Difference”” ** The Bowen ratio is an important parameter in the study of air––sea interaction, particularly in the study of moisture convergence. It is the ratio of sensible to latent heat exchange. Recently, Hsu (1998) reported an interesting relationship between the sea––air temperature difference ( T s −− T a ) and the overwater Bowen ratio ( B ), based on thermodynamic considerations. He used the data collected at four stations in the Gulf of Mexico during the period 1993––97 and proposed a generic relationship of the form B == a ( T s −− T a ) b (1) where the values of a and b are estimated from the field experiments. For open sea conditions, the value of a varied from 0.077 to 0.078, b from 0.67 to 0.71, and the correlation coefficient ( r ) from 0.85 to 0.89. Very similar results were found in a nearshore region (for Grand Isle, Louisiana). The equation with the highest correlation coefficient ( r == 0.85) is given by Hsu (1998) as B == 0.077( T s −− T a ) 0.69 . (2) Normally, values of B are large for cold air outbreak conditions. Chou and Yeh (1986) observed http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Physical Oceanography American Meteorological Society

Comments on ““On the Estimation of Overwater Bowen Ratio from Sea––Air Temperature Difference”” **

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Publisher
American Meteorological Society
Copyright
Copyright © 2000 American Meteorological Society
ISSN
1520-0485
DOI
10.1175/1520-0485(2001)031<1933:COOTEO>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

The Bowen ratio is an important parameter in the study of air––sea interaction, particularly in the study of moisture convergence. It is the ratio of sensible to latent heat exchange. Recently, Hsu (1998) reported an interesting relationship between the sea––air temperature difference ( T s −− T a ) and the overwater Bowen ratio ( B ), based on thermodynamic considerations. He used the data collected at four stations in the Gulf of Mexico during the period 1993––97 and proposed a generic relationship of the form B == a ( T s −− T a ) b (1) where the values of a and b are estimated from the field experiments. For open sea conditions, the value of a varied from 0.077 to 0.078, b from 0.67 to 0.71, and the correlation coefficient ( r ) from 0.85 to 0.89. Very similar results were found in a nearshore region (for Grand Isle, Louisiana). The equation with the highest correlation coefficient ( r == 0.85) is given by Hsu (1998) as B == 0.077( T s −− T a ) 0.69 . (2) Normally, values of B are large for cold air outbreak conditions. Chou and Yeh (1986) observed

Journal

Journal of Physical OceanographyAmerican Meteorological Society

Published: Jan 1, 2000

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