 |
| Titel |
Reconstructing snow avalanches in the Southeastern Pyrenees |
| VerfasserIn |
E. Muntán, C. García, P. Oller, G. Martí, A. García, E. Gutiérrez |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 5 ; Nr. 9, no. 5 (2009-09-28), S.1599-1612 |
| Datensatznummer |
250006982
|
| Publikation (Nr.) |
 copernicus.org/nhess-9-1599-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| A regional study of snow avalanche processes was undertaken in the SE
Pyrenees. Dendrogeomorphology was used to date and reconstruct large-scale
snow avalanche events that occurred in the last four decades.
Dendrochronological analyses yielded the dates of nine winters when
avalanches occurred in the recent past in six studied avalanche paths. Some
of these avalanches were already known, but others had not been documented.
In one case, the existing avalanche path map was improved with the
dendrogeomorphological information of a larger past event. As a result of
the dendrogeomorphological analyses, evidence for three regional-scale major
avalanche years was identified in the SE Pyrenees from 1971 to 2004:
1971–1972, 1995–1996 and 2002–2003. The specific synoptic atmospheric situations
and the most likely nivometeorological and snowpack conditions that released
these major avalanches were determined using weather data for the seasons of
major avalanche releases. In 1971–1972 the snow avalanche episode was
characterized by a deep trough crossing the Pyrenees. In 1995–1996 a variety
of meteorological situations produced several episodes of major avalanches.
In 2002–2003 the more significant of two episodes was attributed to a north
advection pumping an arctic air mass over the Pyrenees. The 1995–1996
avalanche season proved to be the most notable in the four past decades in
the Pyrenees. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|