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Abstracts and Talk Materials

(1) Geophysical fluids: phenomenology and dynamics of rotating, stratified flow.

(2) Potential vorticity: Dynamic significance and kinematic interpretation.

(3) Importance of mixing for maintenance of ocean pycnocline and global overturning circulation: ocean energetics, a little on thermocline theories and/or Sandstrom's theory.

(4) Tracer Observations in the ocean (and atmosphere): Turbulent mixing from dye releases, maybe something on surface stirring/mixing diagnostics from floats.

(5) Tracer cascades: theory and observational support.

April 11, 2010

(1) interaction of molecular diffusion with simple unidirectional shear flows (bounded and unbounded domains).

(2) Limitation of the effective diffusion approximation to long times and small domains, and low moments of the tracer distribution.

(3) Perhaps a geophysical example: shear diffusion in the internal gravity wave field. The vertical tracer cascade of Haynes & Anglade.

(4) Some examples of "pre-asymptotic" anomalous shear
diffusion e.g.,〈x^{2}〉 ∼ t ln t due to the no-slip
condition, and 〈x^{2}〉 ∼ t ^{3/2} in the example of de
Marsily & Matheron.

April 11, 2010