Wind-wave interaction study at light, moderate and high wind speeds

Kuznetsova, A.; Baydakov, G.A.; Troitskaya, Y.I.

Авторы: Kuznetsova Alexandra, Baydakov G.A., Troitskaya Yu I.
Сборник: https://www.icts.res.in/discussion-meeting/cldn2024/title-and-abstract
Тезисы
Год издания: 2024
Место издания: Bangalore, India
Аннотация: The research aimed at wind-wave interaction study in a big range of wind speeds, from light and moderate at a regional scale up to high wind speeds at hurricane wind conditions is performed. The regional model based on the WAVEWATCH III spectral wave model is adapted to the conditions of an inland water body using the WRF atmospheric model. Adaptation and verification of the models was carried out on the basis of the results of a series of field experiments to study the wind-wave regime of the Gorky reservoir performed in 2012–2019 using an autonomous buoy station based on the Froude oceanographic buoy. Within the framework of the WAVEWATCH III model, an analysis of the influence on the simulation result and subsequent adjustment of the parameters of the WAM 3 wind input parameterization was made, as well as the scheme for the approximate calculation of the Boltzmann integral Discrete Interaction Approximation (DIA) is adapted. Within the framework of the WRF model, calculations were carried out using various parameterizations of the planetary boundary layer and the near-surface layer of the atmosphere, and the advantage of using the Large Eddy Simulation (LES) method was shown. At high wind speeds, the influence of small-scale processes at the ocean-atmosphere boundary layer such as spray and foam on the surface waves prediction is studied. Estimates of the effect of including the exact number of specific fragmentation "parachute" type in the spray on the resulting drag coefficient is shown. For the estimates, the numerical simulations within WAVEWATCH III wave model are performed. The importance of small-scale processes for waves at hurricane winds prediction and the prospects for their inclusion in modern numerical wave models is shown. The new method for retrieving the parameters of the atmospheric boundary layer in hurricanes is proposed. It is based on the approximating of the upper parabolic part of the wind speed profile and the retrieval of the lower logarithmic part. Based on the logarithmic part, the friction velocity, near-surface wind speed and the aerodynamic drag coefficient are obtained. The obtained data is used for the verification of the modeling data in WRF-ARW model. The case of the Irma hurricane is studied. Different configurations of the model are tested, which differ in the use of physical parameterizations. The difference of wind profiles in various sectors of the hurricane is studied. Acknowledgements. The work was supported by FSTP project “Study of processes in the boundary layers of the atmosphere, ocean and terrestrial waters and their parameterization in Earth system models” within the project “Improvement of the global world-level Earth system model for research purposes and scenarios forecasting of climate change”
Добавил в систему: Кузнецова Александра Михайловна

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