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| Titel |
Calculated wind climatology of the South-Saxonian/North-Czech mountain topography including improved resolution of mountains |
| VerfasserIn |
D. Hinneburg, G. Tetzlaff |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 14, no. 7 ; Nr. 14, no. 7, S.767-772 |
| Datensatznummer |
250012358
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| Publikation (Nr.) |
 copernicus.org/angeo-14-767-1996.pdf |
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| Zusammenfassung |
| A mesoscale model has been applied to
calculate climatological means of the surface wind. A reliable average requires
more than 40 model runs, which are differentiated by the direction and speed of
the geostrophic wind under the assumption of neutral stratification. The
frequency distributions of the geostrophic wind have been taken from
observations of the 850-hPa winds at the radiosonde station in Prague for a
10-year period. The simulation results have been averaged over all sectors and
speed classes of the geostrophic wind according to their frequencies. A
comparison of the calculated mean wind speeds with observed ones shows
deviations of about 0.4 ms–1 outside the mountains. The
representation of steep topography and isolated mountains on the basis of a 3-km
horizontal resolution of the simulations needs special treatment in order to
reduce the gap of up to 4 ms–1 between observed and simulated mean
wind speeds over mountains. Therefore, an empiric speed-up formula has been
applied to the isolated mountains that otherwise would fall through the 3-km
meshes. The corresponding deviations have been reduced to 1.5 ms–1. |
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