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SUMMARY:A new finite element shallow water model on the sphere: Model setu
 p\, grid refinement\, and boundary separation - Peter Dueben (Max Planck I
 nstitute for Meteorology\, Hamburg\, Germany)
DTSTART:20120118T123000Z
DTEND:20120118T140000Z
UID:TALK36674@talks.cam.ac.uk
CONTACT:Dr Nikolaos Nikiforakis
DESCRIPTION:We study the applicability of a new low order finite element i
 n atmosphere and ocean modeling\, and its performance on refined grids. Th
 e element is attractive because it satisfies a necessary stability criteri
 on (the LBB condition) and is\, at the same time\, able to represent the c
 rucially important geostrophic balance. The finite element is used to solv
 e the viscous and inviscid shallow water equations on a rotating sphere. W
 e test the model on the typical set of shallow water test cases\, and inve
 stigate the errors caused by grid refinement\, such as reflections and sca
 tterings\, but also the scope of improvements possible with a deliberated 
 use of grid refinement. I will finish the talk with some slides on boundar
 y separation of geophysical flows\, considered from a dynamical systems po
 int of view.
LOCATION:Seminar Room B\, Rutherford Building\, Cavendish Laboratory
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