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Izvestiya, Atmospheric and Oceanic Physics

, Volume 53, Issue 1, pp 76–83 | Cite as

Features of wind field over the sea surface in the coastal area

  • A. K. Monzikova
  • V. N. Kudryavtsev
  • A. G. Myasoedov
  • B. Chapron
  • S. S. Zilitinkevich
Article
  • 67 Downloads

Abstract

In this paper we analyze SAR wind field features, in particular the effects of wind shadowing. These effects represent the dynamics of the internal atmospheric boundary layer, which is formed due to the transition of the air flow arriving from the rough land surface to the “smooth” water surface. In the wind-shadowed area, the flow accelerates, and a surface wind stress increases with fetch. The width of the shadow depends not only on the wind speed and atmospheric boundary layer stratification, but also on geographic features such as windflow multiple transformations over the complex surface land–Lake Chudskoe–land–Gulf of Finland. Measurements showed that, in the area of wind acceleration, the surface stress normalized by an equilibrium value (far from the coast) is a universal function of dimensionless fetch Xf/G. Surface wind stress reaches an equilibrium value at Xf/G ≈ 0.4, which is the scale of the planetary-boundary-layer relaxation.

Keywords

wind transformation coastal area internal boundary layer SAR Gulf of Finland 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • A. K. Monzikova
    • 1
  • V. N. Kudryavtsev
    • 1
  • A. G. Myasoedov
    • 1
  • B. Chapron
    • 1
    • 2
  • S. S. Zilitinkevich
    • 3
    • 4
    • 5
    • 6
  1. 1.Russian State Hydrometeorological UniversitySt. PetersburgRussia
  2. 2.Ifremer, Pointe du DiablePlouzanéFrance
  3. 3.Finnish Meteorological InstituteHelsinkiFinland
  4. 4.Lobachevskii State University of Nizhny NovgorodNizhny NovgorodRussia
  5. 5.Moscow State UniversityMoscowRussia
  6. 6.Institute of GeographyRussian Academy of SciencesMoscowRussia

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