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| Titel |
The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 3: Meteorological evaluation of the on-line coupled system |
| VerfasserIn |
Christiane Hofmann, A. Kerkweg, H. Wernli, P. Jöckel |
| 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 ; 5, no. 1 ; Nr. 5, no. 1 (2012-01-19), S.129-147 |
| Datensatznummer |
250002296
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| Publikation (Nr.) |
 copernicus.org/gmd-5-129-2012.pdf |
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| Zusammenfassung |
| Three detailed meteorological case studies are conducted with the global and
regional atmospheric chemistry model system
ECHAM5/MESSy(→COSMO/MESSy)n, shortly named MECO(n).
The aim of this article is to assess the general performance of the on-line coupling of the regional model COSMO to the global model ECHAM5.
The cases are characterised
by intense weather systems in Central Europe: a cold front passage
in March 2010, a convective frontal event in July 2007, and the high impact
winter storm "Kyrill" in January 2007. Simulations are performed with the
new on-line-coupled model system and compared to classical, off-line COSMO
hindcast simulations driven by ECMWF analyses. Precipitation observations
from rain gauges and ECMWF analysis fields are used as reference, and both
qualitative and quantitative measures are used to characterise the quality of
the various simulations. It is shown that, not surprisingly, simulations with
a shorter lead time generally produce more accurate simulations. Irrespective
of lead time, the accuracy of the on-line and off-line COSMO simulations are
comparable for the three cases. This result indicates that the new global and
regional model system MECO(n) is able to simulate key mid-latitude weather
systems, including cyclones, fronts, and convective precipitation, as
accurately as present-day state-of-the-art regional weather prediction models
in standard off-line configuration. Therefore, MECO(n) will be applied to simulate atmospheric chemistry exploring the model's full
capabilities during meteorologically challenging conditions. |
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