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Open AccessArticle

Parameterization of Wave Boundary Layer.

1
Shirshov Institute of Oceanology, RAS, Saint-Petersburg 197110, Russia
2
Department of Infrastructure Engineering, Melbourne School of Engineering, University of Melbourne, Victoria 3010, Australia
3
Laboratory for Regional Oceanography and Numerical Modeling, National Laboratory for Marine Science and Technology, Qingdao 266237, China
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(11), 686; https://doi.org/10.3390/atmos10110686
Received: 9 October 2019 / Revised: 25 October 2019 / Accepted: 2 November 2019 / Published: 7 November 2019
(This article belongs to the Special Issue Wind-Wave Interaction)
It is known that drag coefficient varies in broad limits depending on wind velocity and wave age as well as on wave spectrum and some other parameters. All those effects produce large scatter of the drag coefficient, so, the data is plotted as a function of wind velocity forming a cloud of points with no distinct regularities. Such uncertainty can be overcome by the implementation of the WBL model instead of the calculations of drag with different formulas. The paper is devoted to the formulation of the Wave Boundary Layer (WBL) model for the parameterization of the ocean-atmosphere interactions in coupled ocean-atmosphere models and wave prediction models. The equations explicitly take into account the vertical flux of momentum generated by the wave-produced fluctuations of pressure, velocity and stresses (WPMF). Their surface values are calculated with the use of the spectral beta-functions whose expression was obtained by means of the 2-D simulation of the WBL. Hence, the model directly connects the properties of the WBL with an arbitrary wave spectrum. The spectral and direct wave modeling should also take into account the momentum flux to a subgrid part of the spectrum. The parameterization of this effect in the present paper is formulated in terms of wind and cut-off frequency of the spectrum.
Keywords: wave boundary layer; structure of surface layer above the sea; wind-wave interaction; drag coefficient; fluxes of momentum and energy to waves wave boundary layer; structure of surface layer above the sea; wind-wave interaction; drag coefficient; fluxes of momentum and energy to waves
MDPI and ACS Style

Chalikov, D.; Babanin, A.V. Parameterization of Wave Boundary Layer.. Atmosphere 2019, 10, 686.

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