Data/hora: 07/06/2024 01:57:57

Provedor de dados: | 5
País: | France

Título:

Surfaces de mer et dissipation d'énergie

Sea surface and energy dissipation

Autores: | Veras Guimaraes, Pedro.
Data: | 2018-01-17
Ano: | 2018
Palavras-chave: | Vagues; Stéréo-vidéo; Bouée dérivante; Modélisation; Interaction vague-courant; Modulation; Déferlement; Breaking; Ocean waves; Stereo video; Drifting buoy; Wave modeling; Wave-current interaction.
Resumo: | Stochastic wave formulations and models are the most common tools for the assessment and forecast of sea surface conditions. Their ability to account for some of the processes encountered by waves during their evolution remains however a central question. Among other processes, the wave dissipation is for instance still poorly quantified and traditional methods for wave measurements fail to proper insight into its physics in a wide range of conditions. In this context, the work presented in this PhD aims to explore available observation techniques for their application to several quantitative aspects of the dissipation of wave energy, and particularly for short wave modulated by strong tidal currents, for short wave modulated by longer waves. This work takes advantage of the BBWAVES oceanic campaigns, especially planned to explore questions related to wave and current interactions. Data from a large variety of sensors are analyzed. The campaign provides the ground for the test of a new design of drifting buoy aimed at measuring waves in areas of strong tidal current. Its performances are verified and the description it provides of the area is explored. From simultaneous measurements, it was possible to highlight the actual inaccuracies in wave model capabilities as well as the contribution of the error contained in the atmospheric modeling over strong tidal currents to the misevaluation of sea states. This work also used an extensive dataset from a stereo video experiment in the Black Sea to investigate wave breaking in bimodal sea state conditions. These measurements have revealed the influence of long wave modulation over short wave breaking.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00498/60967/64375.pdf

https://archimer.ifremer.fr/doc/00498/60967/

Editor: | École centrale de Nantes
Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

restricted use