1 / 6

Eddy Topography Interactions on Eastern boundaries

Eddy Topography Interactions on Eastern boundaries. Arnaud Le Boyer – Guillaume Roullet LPO, Brest. Dataset : « Bord Est » experiment 7 moorings / several depths Iberian margin 1 yr long 1989-1990. u. v. Typical KE spectrum. Tidal peaks. High-frequency : gravity waves. Mean flow.

yagil
Download Presentation

Eddy Topography Interactions on Eastern boundaries

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Eddy Topography Interactionson Eastern boundaries Arnaud Le Boyer – Guillaume Roullet LPO, Brest

  2. Dataset : « Bord Est » experiment • 7 moorings / several depths • Iberian margin • 1 yr long 1989-1990 u v

  3. Typical KE spectrum Tidal peaks High-frequency : gravity waves Mean flow Sub inertial range : T >> 1/f Coastal trapped waves (CTW)

  4. Questions: • What is the forcing mechanism for this subinertial range [2days - 80days] ? • Wind • Eddy induced ? • How is this turbulence over the slope related to the mesoscale turbulence ?

  5. Eddy-topography interaction • Mean current = Neptune effect • Transients ? Sketch of the coupling mechanism between eddies and CTW topography tends to force circulation along iso-f/H, associated transients = CTW

  6. Collaboration with DRAKKAR • Investigate this issue within realistic, high resolution (1/12) simulations • Compare spectra on slope to spectra offshore • Relative contributions wind vs. Eddies on transients currents • Need for Eulerian time series along continental margins

More Related