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| Titel |
The 20 February 2010 Madeira flash-floods: synoptic analysis and extreme rainfall assessment |
| VerfasserIn |
M. Fragoso, R. M. Trigo, J. G. Pinto, S. Lopes, A. Lopes, S. Ulbrich, C. Magro |
| 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 ; 12, no. 3 ; Nr. 12, no. 3 (2012-03-23), S.715-730 |
| Datensatznummer |
250010615
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| Publikation (Nr.) |
 copernicus.org/nhess-12-715-2012.pdf |
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| Zusammenfassung |
| This study aims to characterise the rainfall exceptionality and the
meteorological context of the 20 February 2010 flash-floods in Madeira
(Portugal). Daily and hourly precipitation records from the available
rain-gauge station networks are evaluated in order to reconstitute the
temporal evolution of the rainstorm, as its geographic incidence,
contributing to understand the flash-flood dynamics and the type and spatial
distribution of the associated impacts. The exceptionality of the rainstorm
is further confirmed by the return period associated with the daily
precipitation registered at the two long-term record stations, with 146.9 mm
observed in the city of Funchal and 333.8 mm on the mountain top,
corresponding to an estimated return period of approximately 290 yr and
90 yr, respectively. Furthermore, the synoptic associated situation
responsible for the flash-floods is analysed using different sources of
information, e.g., weather charts, reanalysis data, Meteosat images and
radiosounding data, with the focus on two main issues: (1) the dynamical
conditions that promoted such anomalous humidity availability over the Madeira
region on 20 February 2010 and (2) the uplift mechanism that induced deep
convection activity. |
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