Current Research Subjects:

* Interaction of surface gravity waves with winds and currents near
the air-sea interface.  Particular phenomena are the effects of
intermittent wave breaking; wave-averaged vortex force and material
advection; sea-level set up and infra-gravity wave generation;
Langmuir circulations; and wave-pumped wind patterns and their role 
in wave generation.

* Parameterization of the effects of waves and turbulence in planetary
boundary layers.

* Limits to the regime of validity for diagnostic force balance
in rotating, stratified flows; anticyclonic, ageostrophic instability; 
inverse energy cascade in non-rotating turblence; forward energy 
cascade in geostrophic turbulence (at finite Rossby number).

* Vortex deformation and relaxation processes, especially the phenomena
of weakening by externally imposed strain and strengthening by vortex 
Rossby wave evolution, including cyclone-anticyclone asymmetry.

* Coastal oceanic circulation, sediment transport, and biogeochemical 
cycling, especially the behavior of submesoscale fronts, wakes, and 
vortices.

* Intrinsic climate variability induced by the large-scale, low-frequency
fluctuations of oceanic wind gyres and thermohaline circulation.

* Empirical estimation of the global, time-mean oceanic velocity and 
sea-level fields and their low-frequency variability.

* Parameterization of mesoscale-eddy effects on the oceanic general 
circulation: eddy-averaged material advection; eddy diapycnal mixing
in the top and bottom boundary layers; anisotropic horizontal eddy
viscosity; and stochastic excitation and material dispersal.

* Dynamo activity in astrophysical plasmas: the limit of infinite
Prandtl number (typical of interstellar medium), and the influence
of large-scale velocity shear.

* Computational algorithms for turbulence and regional oceanic 
simulation modeling: multi-scale methods, grid-embedding, accurate
advection and pressure-gradient force, hybrid vertical coordinate, 
regional air-sea coupling, and an upper-ocean climate model.