VARIATION IN WIND VELOCITY OVER WATER

Fu Baopu

doi:10.1007/BF02656665

Impact Factor: 5.8

Volume 4 Issue 1

Jan. 1987

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Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1987 > 4(1): 93-104

VARIATION IN WIND VELOCITY OVER WATER

Fu Baopu

1.
Department of Atmospheric Sciences, Nanjing University, Nanjing

Fu Baopu

doi: 10.1007/BF02656665

Abstract
References
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Abstract:
Starting from the equations of motion and continuity, a theoretical model is deduced in this paper for the variation in wind velocity over water caused by abrupt changes in surface roughness and temperature when air flows from land to water, based on the consideration that the turbulent exchange coefficient varies with height and distance from the upwind edge. According to the computation of this model, the variation in wind velocity over water, as the drift of air is from land to water, occurs mainly in the first few kilometers from the upwind edge. The wind velocity over water increases to a maximum when the air over land is stable, it tends to moderate when neutral condition is reached, and least variation is shown in unstable condition. And when the air over land is unstable the wind velocity is less over water than over land in strong winds, but some-what greater in light winds.
References

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Manuscript History

Manuscript received: 10 January 1987

Manuscript revised: 10 January 1987

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

VARIATION IN WIND VELOCITY OVER WATER

Fu Baopu

1. Department of Atmospheric Sciences, Nanjing University, Nanjing

Manuscript received: 1987-01-10
Manuscript revised: 1987-01-10

Abstract: Starting from the equations of motion and continuity, a theoretical model is deduced in this paper for the variation in wind velocity over water caused by abrupt changes in surface roughness and temperature when air flows from land to water, based on the consideration that the turbulent exchange coefficient varies with height and distance from the upwind edge. According to the computation of this model, the variation in wind velocity over water, as the drift of air is from land to water, occurs mainly in the first few kilometers from the upwind edge. The wind velocity over water increases to a maximum when the air over land is stable, it tends to moderate when neutral condition is reached, and least variation is shown in unstable condition. And when the air over land is unstable the wind velocity is less over water than over land in strong winds, but some-what greater in light winds.