Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Drag Coefficient Parameterization Under Hurricane Wind Conditions

Version 1 : Received: 2 May 2023 / Approved: 3 May 2023 / Online: 3 May 2023 (07:28:58 CEST)

A peer-reviewed article of this Preprint also exists.

Kuznetsova, A.; Baydakov, G.; Dosaev, A.; Troitskaya, Y. Drag Coefficient Parameterization under Hurricane Wind Conditions. Water 2023, 15, 1830. Kuznetsova, A.; Baydakov, G.; Dosaev, A.; Troitskaya, Y. Drag Coefficient Parameterization under Hurricane Wind Conditions. Water 2023, 15, 1830.

Abstract

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 parameterizations of wind input were tested within WAVEWATCH III wave model: default ST4 and ST6 parameterizations and the ST1 and ST6 parameterizations used together with the implemented drag coefficient parameterization. The proposed parameterization takes into account the presence of foam and spay. The obtained results are compared with the NDBC buoys data. 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.

Keywords

drag coefficient; parameterizations; wave model; spray; ocean-atmosphere boundary layer

Subject

Environmental and Earth Sciences, Atmospheric Science and Meteorology

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