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SUMMARY:Semi-implicit predictor-corrector methods for atmospheric models -
  Colm Clancy\,   (Environment Canada)
DTSTART:20120926T101000Z
DTEND:20120926T103500Z
UID:TALK40143@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:A class of semi-implicit time integration schemes is proposed 
 for use in atmospheric modelling. Various explicit predictor-corrector met
 hods can be combined with an implicit treatment of the linear terms respon
 sible for fast modes in order to improve computational stability. Linear a
 nalysis is used to identify promising algorithms. These are then tested in
  a finite volume shallow water model on an icosahedral grid. This framewor
 k has been developed at Environment Canada and will be extended to a more 
 complete\, three-dimensional atmospheric model in the future. Experiments 
 with standard test cases show that the proposed time schemes allow for sta
 ble integrations with relatively long time-steps\, while maintaining a suf
 ficient level of accuracy. In particular\, they are more robust than the t
 raditional\, single-stage semi-implicit method using the leapfrog discreti
 sation and do not require a time filter to control the computational mode.
 \n\n
LOCATION:Seminar Room 1\, Newton Institute
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