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| Titel |
Atmospheric circulation patterns associated with strong wind events in Catalonia |
| VerfasserIn |
J. C. Peña, M. Aran, J. Cunillera, J. Amaro |
| 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 ; 11, no. 1 ; Nr. 11, no. 1 (2011-01-13), S.145-155 |
| Datensatznummer |
250009044
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| Publikation (Nr.) |
 copernicus.org/nhess-11-145-2011.pdf |
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| Zusammenfassung |
The benefit of having a daily synoptic weather type catalogue and even more,
a detailed catalogue for high impact weather events is well recognised by
both climatologist and meteorologist communities. In this way the
Meteorological Service of Catalonia (SMC) has produced some accurate
classifications for extreme events, such as hailstorms or strong winds (SW).
Within the framework of the MEDEX project, the SMC has been collaborating to increase
the level of awareness about these events. Following this line of work, the
aim of this study is to characterise the SW events in Catalonia.
According to the guidelines of the MEDEX project we worked with its SW event
database for the period June 1995 to May 2004. We also used the period
2005–2009 to test the methodology. The methodology is based on principal
component, cluster and discriminant analyses and applied to four variables:
SLP, temperature at 850 hPa and geopotential at 500 hPa on a synoptic-scale
and local gust wind. We worked with ERA-Interim reanalysis and applied
discriminant analysis to test the quality of the methodology and to
classify the events of the validation period.
We found seven patterns for the SW events. The strongest event
corresponds to NW-Flow with the Azores Anticyclone and the passing of a low
pressure through the Pyrenees. This methodology has distinguished the summer
events in an independent cluster. The results obtained encourage us to
follow this line of work. |
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