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SUMMARY:Simulations of stratified turbulence surrounding Meddy structures 
 - Hua\, BL (IFREMER)
DTSTART:20081212T100000Z
DTEND:20081212T103000Z
UID:TALK15623@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Recently available geosismic data in the North-East Atlantic o
 cean have revealed ubiquituous pancake-like layers of density anomalies of
  30-60 meters thickness\, surrounding Meddy structures within the Mediterr
 anean Water outflow. The depths of pancake-like density layering unambiguo
 usly coincide with potential energy spectra in $k_h^{-5/3}$\,-- where $k_h
 $ is the horizontal wavenumber--\, for horizontal spatial scales less than
  1km\, reminiscent of non-rotating stratified turbulence results. Using ul
 tra-high 3D resolution simulations of a Meddy structure on the Earth Simul
 ator\, with a horizontal grid size down to 100m and a vertical grid size o
 f 3m\, we have been able to reproduce the pancake-like layering surroundin
 g the eddy. Furthermore\, potential and kinetic energy with $k_h^{-5/3}$ i
 nertial ranges are simulated. A rationale is proposed for the formation me
 chanism of the layering and we discuss the influence of rotation on strati
 fed turbulence properties.
LOCATION:Seminar Room 1\, Newton Institute
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