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Quaresma & Pichon JMS 2013

PHD work (LUIS QUARESMA) : Super-inertial tides over irregular narrow shelves (2012). I. Barotropic tide over realistic narrow shelves. Numerical model: HYCOM In pure isopycnal configuration. Bathymetry: WIBM2009 (New DTM product from HIDROGRAFICO and SHOM hydrographic database )

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Quaresma & Pichon JMS 2013

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  1. PHD work (LUIS QUARESMA) : Super-inertial tides over irregular narrow shelves (2012) I. Barotropic tide over realistic narrow shelves Numerical model: HYCOM In pure isopycnal configuration. Bathymetry: WIBM2009 (New DTM product from HIDROGRAFICO and SHOM hydrographic database ) Tidal Forcing: Optimized polychromatic harmonic ensemble from MOG2D (Lyard et al. 2006) & TPXO (Egbert et al. 1994) M2 S2 N2 K2 ; K1 O1 P1 Q1 Including tide potential generation force and nodal corrections Spatial resolution: 1 arc-minute Parameterization: Bottom, lateral and eddy viscosity parameterization Quaresma & Pichon JMS 2013

  2. Promontory Submarine canyon PHD work (LUIS QUARESMA) : Super-inertial tides over irregular narrow shelves (2012) • Barotropic tide over abrupt shelf features Quaresma & Pichon JPO second revision III. Baroclinic tide over abrupt shelf features submitted to JPO Results with continuous vertical stratification : N=cte Both configurations scatter internal tidal beams perpendicularly to their rim. Refraction processes occur over the slope deflecting waves on-shelf

  3. IT in Bay of Biscay(Annick Pichon) HYCOM Internal Tide modelling compared with observations (A.Pichon et al. JMS 109-110, 2013) ITs ( from HYCOM) are amplified over the shelf break and along a section crossing the Bay of Biscay as seen on SAR imagery To improve comparison with SAR imagery, non hydrostatic effects have to be introduced  production of ISWs. Compilation of several SAR images issued from Atlas of Oceanic Internal Solitary Waves (ONR 2004).

  4. Methodology : Diebels et al. 1994 (two layer model) • Non hydrostatic (NH) effects are introduced in non linear (NL) momentum equations. • Weak NH and NL effects • Horizontally momentum equations are expressed by a vertical average over each layer where cross non NL/NH terms are neglected. Preliminar results : Introduction of some non-hydrostatic terms in HYCOM: application to internal tides in a two layer case. Annick Pichon, France Floc’h Zoom For more details see the poster Internal tide spatial evolution near the continental slope with generation of ISWs.

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