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| Titel |
Linking local wildfire dynamics to pyroCb development |
| VerfasserIn |
R. H. D. McRae, J. J. Sharples, M. Fromm |
| 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. 3 ; Nr. 15, no. 3 (2015-03-05), S.417-428 |
| Datensatznummer |
250119362
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| Publikation (Nr.) |
 copernicus.org/nhess-15-417-2015.pdf |
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| Zusammenfassung |
Extreme wildfires are global phenomena that consistently result in loss of
life and property and further impact the cultural, economic and political
stability of communities. In their most severe form they cause widespread
devastation of environmental assets and are capable of impacting the upper
troposphere/lower stratosphere through the formation of a thunderstorm
within the plume. Such fires are now often observed by a range of remote-sensing technologies, which together allow a greater understanding of a
fire's complex dynamics.
This paper considers one such fire that burnt in the Blue Mountains region
of Australia in late November 2006, which is known to have generated
significant pyrocumulonimbus clouds in a series of blow-up events.
Observations of this fire are analysed in detail to investigate the
localised processes contributing to extreme fire development. In particular,
it has been possible to demonstrate for the first time that the most violent
instances of pyroconvection were driven by, and not just associated with,
atypical local fire dynamics, especially the fire channelling phenomenon,
which arises due to an interaction between an active fire, local terrain
attributes and critical fire weather and causes the fire to rapidly
transition from a frontal to an areal burning pattern. The impacts of local
variations in fire weather and of the atmospheric profile are also
discussed, and the ability to predict extreme fire development with
state-of-the-art tools is explored. |
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