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(Article of periodic en Anglais - 2010)

Document title

Spatio-temporal reconstruction of snow avalanche activity using tree rings : Pierres Jean Jeanne avalanche talus, Massif de l'Oisans, France

Authors(s) and Affiliation(s)

CORONA C. (1) ; ROVÉRA G. (2) ; LOPEZ SAEZ J. (1) ; STOFFEL M. (3 4) ; PERFETTINI P. (5) ;
(1) Cemagref UR EMGR, Saint-Martin d'Hères, FRANCE
(2) Inst. de géographie Alpine, Lab. politiques publiques, Action politique, Territoires (PACTE) UMR 5194 CNRS, Univ. Joseph Fourier, Grenoble, FRANCE
(3) Lab. of Dendrogeomorphology, Inst. of Geological Sciences, Univ., Berne, SUISSE
(4) Inst. for Environmental Sciences (ISE), Univ., Genève, SUISSE
(5) Cemagref de Grenoble, Unité Erosion Torrentielle Neige et Avalanche, Saint-Martin d'Hères, FRANCE

Abstract

The purpose of this study was to reconstruct spatio-temporal patterns of past avalanche activity on a forested avalanche talus in the French Alps (Pierres Jean Jeanne talus, Massif de l'Oisans, France). A total of 232 European larches (Larix decidua Mill.) with clear signs of snow wasting events was analyzed and growth disturbances (GD) related to avalanche activity was assessed. In total, 901 GD were identified in the tree-ring samples, indicating that 20 high-magnitude avalanches occurred between AD 1919 and 1994. The distribution of avalanche years seems to be quite homogeneous in time with a gap between 1951 and 1959 and since 1994. Findings suggest that a strong snow metamorphism under high temperature gradients in January could explain the occurrence of high-magnitude snow avalanches

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2010, vol. 83, no2-3 [pp. 107-118]

Bibliographic references : 1 p.

Collation : 8 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2010.08.004

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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