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SUMMARY:Variable resolution and uniform second and third Order approximati
 on order - Steppeler\, J (Deutscher Wetterdienst (DWD))
DTSTART:20120822T133000Z
DTEND:20120822T140000Z
UID:TALK39328@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Approximations on polygonal grids\, such as cube sphere or ico
 sahedral require a slightly irregular grid\, as for high resolution no uni
 form polygonal cover by cells is possible. For variable resolution sudden 
 refinement is considered not possible by some authors and a gradual change
  of resolution is preferred\,such as with the new MPAS model of NCAR. It w
 ill be shown that such problems can be traced back to a decrease of approx
 imation order to 1 in points where the resolution is irregular. Examples w
 ill be given to show that a jump of resolution is possible without problem
 s when care is taken that in such points an approximation order 2 or 3 is 
 maintained.\n
LOCATION:Seminar Room 1\, Newton Institute
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