Nonhydrostatic atmospheric modeling using a z-coordinate representation

A representation of the orography based on approximate finite-volume techniques is applied to a nonhydrostatic atmospheric model. Techniques previously developed by the authors in the context of a semi-implicit, semi-Lagrangian model are applied also to a Eulerian, split-explicit model. Furthermore,...

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Bibliographic Details
Published in:Monthly weather review 2002-08, Vol.130 (8), p.2143-2149
Main Authors: STEPPELER, Jürgen, BITZER, Heinz-Werner, MINOTTE, Maud, BONAVENTURA, Luca
Format: Article
Language:English
Subjects:
Earth, ocean, space
Exact sciences and technology
External geophysics
Geophysics. Techniques, methods, instrumentation and models
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Summary:A representation of the orography based on approximate finite-volume techniques is applied to a nonhydrostatic atmospheric model. Techniques previously developed by the authors in the context of a semi-implicit, semi-Lagrangian model are applied also to a Eulerian, split-explicit model. Furthermore, an improved formulation of the original approach is introduced, which allows for better orography representation by introducing a simplified version of the most general shaved cells. A two-dimensional numerical test shows that the method developed does not suffer from the problems reported in connection with the eta -coordinate.
ISSN:0027-0644
1520-0493
DOI:10.1175/1520-0493(2002)130<2143:NAMUAZ>2.0.CO;2