Advances in Atmospheric Sciences

, Volume 4, Issue 1, pp 93–104 | Cite as

Variation in wind velocity over water

  • Fu Baopu
Article
Received:

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.

Keywords

Wind Velocity Surface Roughness Atmospheric Science Thermal Stratification Wind Profile 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. Gandin, L.S. (1952), On the transformation of the wind profile,Trudy GGO,33:71–84 (in Russian).Google Scholar
  2. ---(1955),The Principles of Dynamical Meteorology, Gidrometeoizdat, pp. 388-394 (in Russian).Google Scholar
  3. Nadejdina, E.D. (1964), On the change of meteorological elements in case of air flow transformation,Trudy GGO,150:69–76 (in Russian).Google Scholar
  4. Nickerson, E.C. (1968), Boundary layer adjustment as an initial value problem,J. Atmos. Sci.,25: 207–212.CrossRefGoogle Scholar
  5. Panchev, S. and Donev, E. (1971), Wind profile and vertical motions above an abrupt change in surface roughness and temperature,Boundary Layer Meteorol,2:52–63.CrossRefGoogle Scholar
  6. Panofsky, H.A. and Townsend, A.A. (1964), Change of terrain roughness and the wind profile,Quart. J. Roy. Meteorol. Soc.,90:147–155.CrossRefGoogle Scholar
  7. Peterson, E.M. (1969), Modification of mean flow and turbulent energy by change in surface roughness under conditions of neutral stability,ibid.,95:561–575.CrossRefGoogle Scholar
  8. Peterson, E.W. et al. (1980), Further investigation into the effects of local terrain inregularities on tower-measured wind profiles,Boundary-Layer Meteorol.,19:303–314.CrossRefGoogle Scholar
  9. Shir, C.C. (1972), A numerical computation of air flow over sudden change of surface roughness,J. Atmos. Sci.,29: 304–310.CrossRefGoogle Scholar
  10. Shwetz, M.E. (1949), On the approximate solution of some boundary layer problems,Appl. Mathematics Mech.,13: No. 3, (Moscow).Google Scholar
  11. Taylor, P.A. (1969), On wind and shear stress profiles above a change in surface roughness,Quart. J. Roy. Meteorol. Soc.,95:77–91.CrossRefGoogle Scholar
  12. Taylor, P.A. (1970), A numerical model of air-flux, temperature and roughness for neutral and unstable conditions,Boundary-Layer Meteorol.,1:18–40.CrossRefGoogle Scholar
  13. Townsend, A.A. (1965), The response of a turbulent boundary layer to abrupt changes in surface conditions,J. Fluid Mech.,22:799–882.CrossRefGoogle Scholar
  14. Yan Kaiwei et al. (1982), Rules of temperature, humidity, wind profiles and turbulent exchange over water surface layer,Acta Meteorologica Sinica,40:59–72 (in Chinese)Google Scholar
  15. Zaisev, A.S. (1963), Transformation of the wind profile with the change of turbulence intensity,Trudy GGO,95: 42–46 (in Russian)Google Scholar

Copyright information

© Advances in Atmospheric Sciences 1987

Authors and Affiliations

  • Fu Baopu
    • 1
  1. 1.Department of Atmospheric SciencesNanjing UniversityNanjing

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