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| Titel |
A mass-conserving and multi-tracer efficient transport scheme in the online integrated Enviro-HIRLAM model |
| VerfasserIn |
B. Sørensen, E. Kaas, U. S. Korsholm |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 6, no. 4 ; Nr. 6, no. 4 (2013-07-22), S.1029-1042 |
| Datensatznummer |
250017860
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| Publikation (Nr.) |
 copernicus.org/gmd-6-1029-2013.pdf |
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| Zusammenfassung |
| In this paper a new advection scheme for the online coupled chemical–weather
prediction model Enviro-HIRLAM is presented. The new scheme is based on the
locally mass-conserving semi-Lagrangian method (LMCSL), where the original
two-dimensional scheme has been extended to a fully three-dimensional
version. This means that the three-dimensional semi-implicit semi-Lagrangian
scheme which is currently used in Enviro-HIRLAM is largely unchanged. The
HIRLAM model is a computationally efficient hydrostatic operational short-term numerical weather prediction model, which is used as the base for the
online integrated Enviro-HIRLAM. The new scheme is shown to be efficient,
mass conserving, and shape preserving, while only requiring minor alterations
to the original code. It still retains the stability at long time steps,
which the semi-Lagrangian schemes are known for, while handling the emissions
of chemical species accurately. Several mass-conserving filters have been
tested to assess the optimal balance of accuracy vs. efficiency. |
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