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| Titel |
Medicanes in an ocean–atmosphere coupled regional climate model |
| VerfasserIn |
N. Akhtar, J. Brauch, A. Dobler, K. Béranger, B. Ahrens |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 8 ; Nr. 14, no. 8 (2014-08-26), S.2189-2201 |
| Datensatznummer |
250118608
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| Publikation (Nr.) |
 copernicus.org/nhess-14-2189-2014.pdf |
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| Zusammenfassung |
| So-called medicanes (Mediterranean hurricanes) are meso-scale, marine, and
warm-core Mediterranean cyclones that exhibit some similarities to tropical
cyclones. The strong cyclonic winds associated with medicanes threaten the
highly populated coastal areas around the Mediterranean basin. To reduce the
risk of casualties and overall negative impacts, it is important to improve
the understanding of medicanes with the use of numerical models. In this
study, we employ an atmospheric limited-area model (COSMO-CLM) coupled with
a one-dimensional ocean model (1-D NEMO-MED12) to simulate medicanes. The aim
of this study is to assess the robustness of the coupled model in simulating
these extreme events. For this purpose, 11 historical medicane events are
simulated using the atmosphere-only model, COSMO-CLM, and coupled model, with
different setups (horizontal atmospheric grid spacings of 0.44, 0.22, and
0.08°; with/without spectral nudging, and an ocean grid spacing of
1/12°). The results show that at high resolution, the coupled model is
able to not only simulate most of medicane events but also improve the track
length, core temperature, and wind speed of simulated medicanes compared to
the atmosphere-only simulations. The results suggest that the coupled model
is more proficient for systemic and detailed studies of historical medicane
events, and that this model can be an effective tool for future projections. |
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