Magaldi, M. G., RSMAS, University of Miami, Miami, FL, USA, mmagaldi@rsmas.miami.edu
Özgökmen, T. M., RSMAS, University of Miami, Miami, FL, USA, tozgokmen@rsmas.miami.edu
Griffa, A. ., RSMAS, University of Miami, Miami, FL, USA, agriffa@rsmas.miami.edu
Chassignet, E. P., COAPS, Florida State University, Tallahassee, FL, USA, echassignet@coaps.fsu.edu
Peters, H. ., RSMAS, University of Miami, Miami, FL, USA, hpeters@rsmas.miami.edu
Iskandarani, M. ., RSMAS, University of Miami, Miami, FL, USA, miskandarani@rsmas.miami.edu

CAPES AND FORM DRAG: THE ROLE OF STRATIFICATION

Capes and headlands are topographic features important for coastal circulation since they are associated with high values of mixing and dissipation. Phenomena like current separation, lee waves and generation of eddies have important biological consequences and influence the drag force being imparted on the larger scale flow. In this work, the effect of stratification on eddy generation past capes is investigated. We present a sensitivity study considering a steady barotropic current impinging on an idealized triangular headland in a rotating and linearly stratified environment. Numerical experiments are conducted using ROMS in a wide range of parameter space, consisting of the slope of the obstacle, the Burger and the Rossby numbers. The form drag exerted by the cape on the coastal current and the mixing downstream are calculated. It is found that the eddy shedding regimes depend on the Burger number. The form drag coefficient is expressed as a function of both the Burger number and the cape slope.

Oral presentation

Presentation is given by student: Yes
Session #:117
Date: 03-05-2008
Time: 16:45

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