Atmospheric boundary layer over steep surface waves

Turbulent air-sea interactions coupled with the surface wave dynamics remain a challenging problem. The needs to include this kind of interaction into the coupled environmental, weather and climate models motivate the development of a simplified approximation of the complex and strongly nonlinear in...

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Bibliographic Details
Published in:Ocean dynamics 2014-08, Vol.64 (8), p.1153-1161
Main Authors: Troitskaya, Yuliya, Sergeev, Daniil A., Druzhinin, Oleg, Kandaurov, Alexander A., Ermakova, Olga S., Ezhova, Ekaterina V., Esau, Igor, Zilitinkevich, Sergej
Format: Article
Language:English
Subjects:
Air flow
Atmospheric boundary layer
Atmospheric Sciences
Boundary layers
Climate models
Earth and Environmental Science
Earth Sciences
Flow separation
Flow velocity
Fluid- and Aerodynamics
Geophysics/Geodesy
Monitoring/Environmental Analysis
Norway 17-20 June 2013
Ocean-atmosphere interaction
Oceanography
Surface waves
Topical Collection on the 5th International Workshop on Modelling the Ocean (IWMO) in Bergen
Turbulence
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Summary:Turbulent air-sea interactions coupled with the surface wave dynamics remain a challenging problem. The needs to include this kind of interaction into the coupled environmental, weather and climate models motivate the development of a simplified approximation of the complex and strongly nonlinear interaction processes. This study proposes a quasi-linear model of wind-wave coupling. It formulates the approach and derives the model equations. The model is verified through a set of laboratory (direct measurements of an airflow by the particle image velocimetry (PIV) technique) and numerical (a direct numerical simulation (DNS) technique) experiments. The experiments support the central model assumption that the flow velocity field averaged over an ensemble of turbulent fluctuations is smooth and does not demonstrate flow separation from the crests of the waves. The proposed quasi-linear model correctly recovers the measured characteristics of the turbulent boundary layer over the waved water surface.
ISSN:1616-7341
1616-7228
DOI:10.1007/s10236-014-0743-4