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| Titel |
Dendrogeomorphology and high-magnitude snow avalanches: a review and case study |
| VerfasserIn |
D. R. Butler, C. F. Sawyer |
| 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 ; 8, no. 2 ; Nr. 8, no. 2 (2008-04-04), S.303-309 |
| Datensatznummer |
250005410
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| Publikation (Nr.) |
 copernicus.org/nhess-8-303-2008.pdf |
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| Zusammenfassung |
| The application of the principles of dendrogeomorphology for the dating of
high-magnitude snow avalanches is well established in the natural hazards
literature. A variety of methodologies are employed by different authors,
however, and no standardization currently exists for appropriate sample
sizes, the issue of "weighting" certain tree-ring responses as more
important than others, or the minimum number of responding trees required in
order to infer an avalanche event. We review the literature of
dendrogeomorphology as it applies to snow avalanches, and examine the
questions of sample size, type of ring reactions dated and weighted, and
minimum responses. We present tree-ring data from two avalanche paths in the
Rocky Mountains of Montana, USA, from trees uprooted by major snow
avalanches in the winter of 2002. These data provide distinct chronologies
of past avalanche events, and also illustrate how the critical choice of a
minimum Index Number can affect the number of avalanche events in a final
chronology based on tree-ring analysis. |
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