BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Energy cascades in rotating and stratified turbulence - Erik Lindb
 org (KTH)
DTSTART:20130531T150000Z
DTEND:20130531T160000Z
UID:TALK44331@talks.cam.ac.uk
CONTACT:Dr Ed Brambley
DESCRIPTION:We present numerical and theoretical results on the energy cas
 cade in a number of hydrodynamical systems. The systems that we study are 
 the 2-D Navier-Stokes equations\, the quasi-geostropophic equations\, the 
 so called primitive equations\, in which hydrostatic balance is assumed an
 d the Boussinesq equations. We find that the parameter which is regulating
  the strength of the downscale energy cascade is the Rossby number\, with 
 a decreasing amount of energy going into a downscale energy cascade with i
 ncreasing rate of rotation. Stratification\, on the other hand\, does not 
 inhibit a downscale energy cascade. Based on the primitive equations\, we 
 also present a new formulation of the spectral energy budged of the atmosp
 here\, with spherical harmonics as base functions. Using this formulation 
 we analyze data from two General Circulation Models. In one of the models 
 we  find evidence of a strong downscale energy cascade starting at 1000 km
  scales. In the other model\, the cascade is inhibited by strongly dissipa
 tive processes at these scales
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberforce Road\, Cambr
 idge
END:VEVENT
END:VCALENDAR