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SUMMARY:An exact analytical solution for gravity wave expansion of the com
 pressible\, non-hydrostatic Euler equations on the sphere - Michael Baldau
 f\,   (Deutscher Wetterdienst (DWD))
DTSTART:20120927T153500Z
DTEND:20120927T160000Z
UID:TALK40210@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:For the development and assessment of dynamical cores for atmo
 spheric simulation models\, suitable idealized test setups with known solu
 tions are very useful. But only in rare cases exact analytical solutions e
 xist for the underlying equation systems. In this work a slightly modified
  version of the original idea of Skamarock\, Klemp (1994) is proposed: the
  quasi linear expansion of sound and gravity waves on a sphere induced by 
 a weak warm bubble. For this case an exact analytical solution for the com
 pressible\, non-hydrostatic Euler equations was found for a shallow atmosp
 here and optionally with inclusion of Coriolis effects for a 'spherical f-
 plane-approximation'. \n\nThis solution can be used as reference for conve
 rgence studies of global models. 'Small earth' convergence tests with the 
 ICON model of the Deutscher Wetterdienst (DWD) and the Max-Planck Institut
  of Meteorology (MPI) are shown. \n\n
LOCATION:Seminar Room 1\, Newton Institute
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