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| Titel |
Atmospheric patterns for heavy rain events in Calabria |
| VerfasserIn |
S. Federico, E. Avolio, L. Pasqualoni, C. Bellecci |
| 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 ; 8, no. 5 ; Nr. 8, no. 5 (2008-10-24), S.1173-1186 |
| Datensatznummer |
250005779
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| Publikation (Nr.) |
 copernicus.org/nhess-8-1173-2008.pdf |
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| Zusammenfassung |
This study investigates the atmospheric pattern circulations associated with
heavy rainfall (HR) days in Calabria, southern Italy, and contributes to the
understanding of the dynamical mechanisms that produce those events.
Heavy rainfall days are extracted from the raingauge database of the
"Protezione Civile Regionale", which has more than a hundred pluviometric
stations for the period 1999–2007 (eight years).
To study the synoptic atmospheric circulations associated with HR we use the
Regional Atmospheric Modeling System (RAMS) gridded data field of 925 hPa and
500 hPa geopotential height. First the number of variables is reduced by
principal component analysis (PCA), then a cluster analysis (CA) is applied
on those new atmospheric variables and eleven atmospheric patterns are
obtained.
Clear associations emerged between each of the circulation types and
rainfall patterns over Calabria for HR days. These associations can be
explained by the interaction between the complex orography of the region,
the sea and the synoptic scale flow. |
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