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SUMMARY:Design of a dynamical core based on the nonhydrostatic unified sys
 tem of equations - Celal Konor\,   (Colorado State University)
DTSTART:20120927T132500Z
DTEND:20120927T135000Z
UID:TALK40223@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:In this talk\, we present the design of a dry dynamical core b
 ased on the nonhydrostatic unified system of equations. The unified system
  filters vertically propagating acoustic waves. The dynamical core predict
 s the potential temperature and horizontal momentum. It uses the predicted
  potential temperature to determine the quasi-hydrostatic components of th
 e Exner pressure and density. The continuity equation is diagnostic (and u
 sed to determine vertical mass flux) because the time derivative of the qu
 asi-hydrostatic density is obtained from the predicted potential temperatu
 re. The nonhydrostatic component of the Exner pressure is obtained from an
  elliptic equation. The main focus of this paper is on the integration pro
 cedure of this unique dynamical core. Height is used as the vertical coord
 inate\, and the equations are vertically discretized on a Lorenz-type grid
 . Cartesian horizontal coordinates are used along with an Arakawa C-grid i
 n the planar version of the dynamical core. The global version of the dyna
 mical core is based on the vorticity and divergence predicting Z-grid form
 ulation. The performance of the model in simulating a wide range of dynami
 cal scales in the planar and global domains is demonstrated through ideali
 zed extratropical cyclogenesis simulations\, and warm and cold bubble test
  cases.\n
LOCATION:Seminar Room 1\, Newton Institute
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