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| Titel |
Daily precipitation records over mainland Spain and the Balearic Islands |
| VerfasserIn |
C. Ramis, V. Homar, A. Amengual, R. Romero, S. Alonso |
| 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 ; 13, no. 10 ; Nr. 13, no. 10 (2013-10-09), S.2483-2491 |
| Datensatznummer |
250085528
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| Publikation (Nr.) |
 copernicus.org/nhess-13-2483-2013.pdf |
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| Zusammenfassung |
| Understanding the spatial distribution of extreme precipitations is of major
interest in order to improve our knowledge of the climate of a region and its
relationship with society. These analyses inevitably require the use of
directly observed values to account for the actual extreme amounts rather
than analyzed gridded values. A study of daily rainfall extremes observed
over mainland Spain and the Balearic Islands is performed by using records
from 8135 rain gauge stations from the Spanish Weather Agency (AEMET).
Results show that the heaviest daily precipitations have been observed mainly
on the coastal Mediterranean zone from Gibraltar to the Pyrenees. In
particular, a record value of 817 mm was recorded in the Valencia region in
1987. The current map of daily records in Spain, which updates the pioneering
work of the Spanish meteorologist Font, shows similar distribution of extreme
events but with notably higher amounts. Generalized extreme values
distributions fit the Mediterranean and Atlantic rain gauge measurements and
shows the different characteristics of the extreme daily precipitations in
both regions. We identify the most extreme events (above 500 mm per day) and
provide a brief description of a typical meteorological situation in which
these damaging events occur. An analysis of the low-level circulation
patterns producing such extremes – by means of simple indices such as NAO,
WeMOi and IBEI – confirms the relevance of local flows in the generation of
either Mediterranean or Atlantic episodes. WeMOi, and even more IBEI, are
good discriminants of the region affected by the record precipitation event. |
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