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| Titel |
Towards a systematic climatology of sensitivities of Mediterranean high impact weather: a contribution based on intense cyclones |
| VerfasserIn |
V. Homar, A. Jansa, J. Campins, A. Genovés, C. Ramis |
| 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 Science ; 7, no. 4 ; Nr. 7, no. 4 (2007-07-13), S.445-454 |
| Datensatznummer |
250004654
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| Publikation (Nr.) |
 copernicus.org/nhess-7-445-2007.pdf |
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| Zusammenfassung |
One of the multiple approaches currently explored to mitigate the effects of
hydro-meteorological hazardous events aims at improving the numerical weather
forecasts. Under an ever increasing societal demand for cost cuts and more
precise forecasts, targeted observations are currently receiving great
attention within the operational weather community. The MEDEX project
(http://medex.inm.uib.es) is aimed at improving the forecasts of high impact
weather (HIW) in the Mediterranean and, in particular, proposes the creation
of a climatology of sensitivities of such episodes. The construction of a
comprehensive climatology of sensitivities is hampered by the lack of an
exhaustive collection of Mediterranean HIW events.
In this study we contribute with a systematic climatology of Mediterranean
intense cyclones. We perform an objective cluster analysis of intense
cyclones detected from the ECMWF ERA40 reanalysis using a k-means algorithm
and compute the sensitivities for each of the resulting classes. For each
cluster, a representative sensitivity field is computed using the MM5 Adjoint
Modeling system. The results show that although the sensitive areas for
intense Mediterranean cyclones are not particularly confined, it is
remarkable how areas poorly sampled by the regular observing networks, such
as North Africa, the Mediterranean Sea and the eastern North-Atlantic, are
highlighted in the prototype sensitivity maps. |
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