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The effect of synoptic-scale advection on the performance of the Priestley-Taylor evaporation formula

✍ Scribed by Bhawan Singh; Richard Taillefer

Publisher
Springer
Year
1986
Tongue
English
Weight
882 KB
Volume
36
Category
Article
ISSN
0006-8314

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✦ Synopsis

Measurements ofthe appropriate parameters for the calculation ofthe latent heat flux over a black spruce forest in northern Quebec were carried out in August, 1980. Values of the Priestley-Taylor parameter, a, were derived by exploiting the Bowen-ratio-energy-balance (BREB) rechnique. Derived values of a are then related to synoptic-scale warm air advection, derived from surface synoptic charts and tephigrams of the planetary boundary layer. It is found that when warm air advection is present, a > 1.26, especially when the surface is wet. When advection enhancement is removed, however, values of a approach unity. A new approach to calculating the latent heat flux, when warm air advection is present, is therefore proposed.

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