Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Comparison and validation of physical wave parameterizations in spectral wave models ArchiMer
Stopa, Justin; Ardhuin, Fabrice; Babanin, Alexander; Zieger, Stefan.
Recent developments in the physical parameterizations available in spectral wave models have already been validated, but there is little information on their relative performance especially with focus on the higher order spectral moments and wave partitions. This study concentrates on documenting their strengths and limitations using satellite measurements, buoy spectra, and a comparison between the different models. It is confirmed that all models perform well in terms of significant wave heights; however higher-order moments have larger errors. The partition wave quantities perform well in terms of direction and frequency but the magnitude and directional spread typically have larger discrepancies. The high-frequency tail is examined through the mean...
Tipo: Text Palavras-chave: WAVEWATCH III; Spectral wave modeling; Wave hindcasting; Source terms; Higher order wave moments; Swell dissipation.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00280/39122/38300.pdf
Imagem não selecionada

Imprime registro no formato completo
On the coupling of wave and three-dimensional circulation models: Choice of theoretical framework, practical implementation and adiabatic tests ArchiMer
Bennis, Anne-claire; Ardhuin, Fabrice; Dumas, Franck.
Many theoretical approaches and implementations have been proposed for the coupling of the three-dimensional ocean circulation with waves. The theoretical models are reviewed and it is shown that the formulation in terms of the quasi-Eulerian velocity circumvents the essential difficulty of alternative formulations for the Lagrangian mean velocity. Namely, models based on this Lagrangian velocity require an estimation of wave-induced motions to first order in the horizontal gradients of the wave field in order to estimate the vertical flux of wave pseudo-momentum. So far, only three-dimensional wave models have been able to provide these estimates, and all published theories based on the simpler Airy theory are not consistent at the leading order, because...
Tipo: Text Palavras-chave: Wave-current coupling; Radiation stresses; MARS3D; WAVEWATCH III.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00056/16705/14198.pdf
Imagem não selecionada

Imprime registro no formato completo
Un nouveau modèle couplé vagues-courant 3D : développement et validation ArchiMer
Bennis, Anne-claire; Ardhuin, Fabrice; Odaka, Tina; Dumas, Franck.
A numerical model coupling the three-dimensional oceanic circulation, thanks to the MARS3D model, and the sea state computed by the WAVEWATCH III model, is developed in order to study the hydrodynamic of the nearshore zone. The main principle of the coupled model based on the coupler PALM and the necessary modifications made for the coupling procedure to both numerical codes are described. First tests in horizontal two-dimension are made and they allowed us to develop a primary version. For three-dimensional flow, we show that the coupled model must solve the quasi-Eulerian velocity. In fact, a coherent analytical form of the wave forcing for the Lagrangian velocity does not exist. This point is illustrated by one example with large errors in comparison...
Tipo: Text Palavras-chave: Modélisation couplée; Circulation côtière; MARS3D; WAVEWATCH III.; Wave-current modeling; Nearshore zone; MARS3D; WAVEWATCH III.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00286/39707/38162.pdf
Imagem não selecionada

Imprime registro no formato completo
Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup ArchiMer
Ardhuin, Fabrice; Boutin, Guillaume; Stopa, Justin; Girard-ardhuin, Fanny; Melsheimer, Christian; Thomson, Jim; Kohout, Alison; Doble, Martin; Wadhams, Peter.
Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice breakup by the waves. The possible influence of these processes is evaluated in the marginal ice zone of the Beaufort Sea, where extensive wave measurements were performed. The wave data includes in situ measurements and the first kilometer-scale map of wave heights provided by Sentinel-1 SAR imagery on 12 October 2015, up to 400 km into the ice. We find that viscous friction at the base of an ice layer gives a dissipation rate that may be too large near the ice...
Tipo: Text Palavras-chave: Wind-waves; Sea ice; WAVEWATCH III; SAR; Beaufort; Arctic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00462/57372/59439.pdf
Registros recuperados: 4
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional