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Detailed Reference Information |
Garbrecht, T., Lüpkes, C., Augstein, E. and Wamser, C. (1999). Influence of a sea ice ridge on low-level airflow. Journal of Geophysical Research 104: doi: 10.1029/1999JD900488. issn: 0148-0227. |
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The influence of a single pressure ridge of 4.5 m height on the structure of the atmospheric surface layer is studied. The field of the mean wind velocity is governed by typical features of a Bernoulli effect with a speedup over the crest and a shadowing effect downwind of the ridge. It is found that the turbulence generated by the ridge compensates for the deformation of the flow field by mixing momentum downward. Both mean and turbulent fields are restored to their upwind values at a distance of ~ 300 m downwind of the ridge, which is equivalent to an aspect ratio of ~0.015. The level of maximum turbulence generated by the ridge is characterized by a linear relationship. A formulation for the determination of the form drag of a single ridge is proposed and generalized toward an ensemble of ridges. We estimate that the form drag contributes <50% to the total drag exerted by a typically ice covered sea surface on the atmospheric flow. ¿ 1999 American Geophysical Union |
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Abstract |
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Keywords
Meteorology and Atmospheric Dynamics, Boundary layer processes, Meteorology and Atmospheric Dynamics, Ocean/atmosphere interactions (0312, 4504), Meteorology and Atmospheric Dynamics, Polar meteorology, Meteorology and Atmospheric Dynamics, Turbulence, Atmospheric Composition and Structure, Middle atmosphere—composition and chemistry, Hydrology, Precipitation |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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