Relative current effect on short wave growth
Type | Article | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | 2022-08 | ||||||||||||
Language | English | ||||||||||||
Author(s) | Veras Guimarães Pedro2, 3, 6, Ardhuin Fabrice6, Perignon Yves2, Benetazzo Alvise4, Bouin Marie-Noëlle6, Garnier Valerie1, Redelsperger Jean-Luc6, Accensi Mickael1, Thomson Jim5 | ||||||||||||
Affiliation(s) | 1 : Laboratoire d’Océanographie Physique et Spatiale, Univ. Brest, CNRS, Ifremer, IRD, 1625 Route de Sainte-Anne, Plouzané, 29280, Finestèr, France 2 : LHEEA lab UMR6598, École Centrale de Nantes, 1 Rue de la Noë, Nantes, 44300, Pays de la Loire, France 3 : Graduate Program in Ocean Engineering (PPGEO), Federal University of Rio Grande - FURG, Av. Itália, s/n - km 8, Rio Grande, 96203-900, RS, Brazil 4 : Istituto di Scienze Marine (ISMAR), Consiglio Nazionale delle Ricerche (CNR), Arsenale Castello, 2737/F, Venice, 30122, VE, Italy 5 : Applied Physics Lab, University of Washington, Henderson Hall (HND), 1013 NE 40th St, Seattle, 98105, WA, USA 6 : Laboratoire d’Océanographie Physique et Spatiale, Univ. Brest, CNRS, Ifremer, IRD, 1625 Route de Sainte-Anne, Plouzané, 29280, Finestèr, France |
||||||||||||
Source | Ocean Dynamics (1616-7341) (Springer Science and Business Media LLC), 2022-08 , Vol. 72 , N. 8 , P. 621-639 | ||||||||||||
DOI | 10.1007/s10236-022-01520-0 | ||||||||||||
WOS© Times Cited | 1 | ||||||||||||
Keyword(s) | Air-sea interaction, Wind waves, Waves growth, Strong current | ||||||||||||
Abstract | Short waves growth is characterized by nonlinear and dynamic processes that couple ocean and atmosphere. Ocean surface currents can have a strong impact on short wave steepness and breaking, modifying the surface roughness, and consequently their growth. However, this interplay is poorly understood and observations are scarce. This work uses in situ measurements of near-surface winds, surface current, and waves under strong tidal current conditions to investigate the relative wind speed effect on the local short waves growth. Those observations were extensive compared with numerical modeling using WAVEWACHIII, where the simulations repeatedly fail to reproduce the observed wind sea energy under strong current conditions. Our field observations and coupled ocean-atmosphere numerical simulations suggest that surface currents can strongly modulate surface winds. That is a local process, better observed closer to the boundary layer than at 10 m height. Yet, it can cause a significant impact on the local wind shear estimation and consequently on the local waves’ growth source term. The results presented here show that the relative wind effect is not well solved inside spectral waves models, causing a significant bias around the peak of wind sea energy. |
||||||||||||
Full Text |
|