HR: 14:00h
AN: OS23E-02 INVITED     [Abstracts]
TI: Tools for forecasting in the coastal ocean: a coherent hydrodynamic formalism for numerical models and some first steps toward a coherent use of radar remote sensing.
AU: * Ardhuin, F
EM: ardhuin@shom.fr
AF: Service Hydrographique et Oc‚anographique de la Marine, 13 rue du Chatellier, Brest, 29609 France
AU: Rascle, N
EM: rascle@shom.fr
AF: Service Hydrographique et Oc‚anographique de la Marine, 13 rue du Chatellier, Brest, 29609 France
AB: Operational oceanography systems are being developed for many coastal areas, often based on global or basin scale concept whereas dynamics and relevant observations may be very different. Waves, in particular are generally poorly represented. We give here practical equations for momentum and mass conservation, coupling waves, mean flow and turbulence, uniformly valid from oceanic scales to the nearshore. These are generalized from Mellor (J. Phys. Oceanogr. 2003) and re-derived from the Generalized Lagrangian Mean equations (Andrews and McIntyre, J. Fluid Mech. 1978). They include a Generalized Lagrangian Mean equation for the turbulent kinetic energy that describes the stretching of turbulence by the Stokes drift shear. Consistent boundary conditions and parameterizations are also described. The equations derived here are readily integrated by coupling a spectral wave model to an ocean circulation model, with practical applications to the forecasting of surface drift, upper ocean mixing, coastal ocean circulation and wave forecasting. With this view in mind we discuss some early model results on surface Eulerian and drift velocity, and the first steps towards a coherent processing of radar remote sensing (HF and InSAR or SAR Doppler centro‹d) to constrain ocean forecasts.
UR: http://surfouest.free.fr/WOO2003
DE: 3379 Turbulence
DE: 3384 Waves and tides
DE: 4263 Ocean prediction
DE: 4504 Air/sea interactions (0312)
DE: 4546 Nearshore processes
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting