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| Titel |
Sea surface temperature and torrential rains in the Valencia region: modelling the role of recharge areas |
| VerfasserIn |
F. Pastor, J. A. Valiente, M. J. Estrela |
| 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 Sciences ; 15, no. 7 ; Nr. 15, no. 7 (2015-07-31), S.1677-1693 |
| Datensatznummer |
250119609
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| Publikation (Nr.) |
 copernicus.org/nhess-15-1677-2015.pdf |
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| Zusammenfassung |
| Heavy rain events are frequently recorded in the Western Mediterranean
causing economic losses and even human casualties. The Western Mediterranean
is a deep and almost closed sea surrounded by high mountain ranges and with
little exchange of water with the Atlantic ocean. A main factor in the
development of torrential rains is ocean-atmosphere exchanges of heat and
moisture that can potentially destabilize air masses travelling over the sea.
The study of air mass trajectories previous to the rain event permits the
identification of sea areas that could probably contribute to the development
or intensification of rainfall. From a previous Mediterranean sea surface
temperature climatology, its spatio-temporal distribution patterns have been
studied showing two main distribution modes in winter and summer and
transitional regimes in spring and autumn. Hence, three heavy precipitation
events, for such winter and summer sea temperature regimes and for fall
transition, affecting the Valencia region have been selected to study the
effect of sea surface temperature in torrential rains. Simulations with
perturbed sea surface temperature in different areas along the air mass path
were run to compare results with unperturbed simulation. The variation of sea
surface temperature in certain areas caused significant changes in model
accumulated values and its spatial distribution. Therefore, the existence of
areas that at a greater extent favour air-sea interaction leading to the
development of torrential rainfall in the Valencia region has been shown. This
methodology could be extended to the whole Mediterranean basin to look for
such potential recharge areas. The identification of sea areas that
contribute to the development or intensification of heavy rain events in the
Mediterranean countries could be a useful prognosis and/or monitoring tool. |
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