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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Design of a dynamical core based on the nonhydrost
atic unified system of equations - Celal Konor\,
(Colorado State University)
DTSTART;TZID=Europe/London:20120927T142500
DTEND;TZID=Europe/London:20120927T145000
UID:TALK40223AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/40223
DESCRIPTION:In this talk\, we present the design of a dry dyna
mical core based on the nonhydrostatic unified sys
tem of equations. The unified system filters verti
cally propagating acoustic waves. The dynamical co
re predicts the potential temperature and horizont
al momentum. It uses the predicted potential tempe
rature to determine the quasi-hydrostatic componen
ts of the Exner pressure and density. The continui
ty equation is diagnostic (and used to determine v
ertical mass flux) because the time derivative of
the quasi-hydrostatic density is obtained from the
predicted potential temperature. The nonhydrostat
ic component of the Exner pressure is obtained fro
m an elliptic equation. The main focus of this pap
er is on the integration procedure of this unique
dynamical core. Height is used as the vertical coo
rdinate\, and the equations are vertically discret
ized on a Lorenz-type grid. Cartesian horizontal c
oordinates are used along with an Arakawa C-grid i
n the planar version of the dynamical core. The gl
obal version of the dynamical core is based on the
vorticity and divergence predicting Z-grid formul
ation. The performance of the model in simulating
a wide range of dynamical scales in the planar and
global domains is demonstrated through idealized
extratropical cyclogenesis simulations\, and warm
and cold bubble test cases.\n
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:Mustapha Amrani
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