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| Titel |
Synoptic patterns associated with wildfires caused by lightning in Castile and Leon, Spain |
| VerfasserIn |
E. García-Ortega, M. T. Trobajo, L. López, J. L. Sánchez |
| 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. 3 ; Nr. 11, no. 3 (2011-03-16), S.851-863 |
| Datensatznummer |
250009266
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| Publikation (Nr.) |
 copernicus.org/nhess-11-851-2011.pdf |
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| Zusammenfassung |
| The Iberian Peninsula presents the highest number of wildfires in Europe. In
the NW of Spain in particular, wildfires are the natural risk with the
greatest economic impact in this region. Wildfires caused by lightning are
closely related to the triggering of convective phenomena. The prediction of
thunderstorms is a very complex task because these weather events have a
local character and are highly dependent on mesoscale atmospheric conditions.
The development of convective storms is directly linked to the existence of a
synoptic environment favoring convection. The aim of this study is to
classify the atmospheric patterns that provide favorable environments for the
occurrence of wildfires caused by lightning in the region of Castile and
Leon, Spain. The database used for the study contains 376 wildfire days from
the period 1987–2006. NCEP data reanalysis has been used. The atmospheric
fields used to characterise each day were: geopotential heights and
temperatures at 500 hPa and 850 hPa, relative humidity and the horizontal
wind at 850 hPa. A Principal Component Analysis in T-mode followed by a
Cluster Analysis resulted in a classification of wildfire days into five
clusters. The characteristics of these clusters were analysed and described,
focusing particularly on the study of those wildfire days in which more than
one wildfire was detected. In these cases the main feature observed was the
intensification of the disturbance typical of the
cluster to which the wildfire belongs. |
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