The limits of beta plane turbulence

Richard Scott (U of St Andrews)

May 22. 2023, 14:45 — 15:30

We will begin by reviewing some recent work on how jet separation scales with Rhines scale and deformation radius in the quasigeostrophic shallow-water system on the beta-plane.  Simple estimates based on straight-jet profiles require modification at small deformation radius when jets begin to meander extensively in latitude. Allowing the Rhines scale to exceed the domain scale leads to a simplification of the flow structure.  New work suggests a condensation of the flow into a simple, stationary form comprising a single jet meandering extensively around two compact vortices, with a transition in the jet structure between small and large deformation radii.  The relation to the vorticity condensate obtained with beta=0 will also be discussed briefly.

Further Information
ESI Boltzmann Lecture Hall
Associated Event:
The Dynamics of Planetary-scale Fluid Flows (Thematic Programme)
Adrian Constantin (U of Vienna)
David Dritschel (U of St Andrews)
Nathan Paldor (HU of Jerusalem)