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| Titel |
Forest fire danger rating in complex topography – results from a case study in the Bavarian Alps in autumn 2011 |
| VerfasserIn |
C. Schunk, C. Wastl, M. Leuchner, C. Schuster, A. Menzel |
| 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. 9 ; Nr. 13, no. 9 (2013-09-06), S.2157-2167 |
| Datensatznummer |
250085506
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| Publikation (Nr.) |
 copernicus.org/nhess-13-2157-2013.pdf |
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| Zusammenfassung |
Forest fire danger rating based on sparse meteorological stations is known
to be potentially misleading when assigned to larger areas of complex
topography. This case study examines several fire danger indices based on
data from two meteorological stations at different elevations during a major
drought period.
This drought was caused by a persistent high pressure system, inducing a
pronounced temperature inversion and its associated thermal belt with much
warmer, dryer conditions in intermediate elevations. Thus, a massive drying
of fuels, leading to higher fire danger levels, and multiple fire occurrences
at mid-slope positions were contrasted by moderate fire danger especially in
the valleys. The ability of fire danger indices to resolve this situation
was studied based on a comparison with the actual fire danger as determined
from expert observations, fire occurrences and fuel moisture measurements.
The results revealed that, during temperature inversion, differences in
daily cycles of meteorological parameters influence fire danger and that
these are not resolved by standard meteorological stations and fire danger
indices (calculated on a once-a-day basis). Additional stations in higher
locations or high-resolution meteorological models combined with fire danger
indices accepting at least hourly input data may allow reasonable fire
danger calculations under these circumstances. |
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