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High-precision dating of debris-flow events within the growing season

Kaczka Ryszard J., Deslauriers Anne et Morin Hubert. (2010). High-precision dating of debris-flow events within the growing season. Dans Markus Stoffel, Michelle Bollschweiler, David R. Butler et Brian H. Luckman (dir.), Tree Rings and Natural Hazards. (41, p. 227-229). Advances in Global Change Research. New York : Springer.

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URL officielle: http://dx.doi.org/doi:10.1007/978-90-481-8736-2_21

Résumé

We established and tested a new method of precise debris-flow dating using an existing model of wood formation (Deslauriers et al. 2003). The study was based on the hypothesis that scars and other wood anomalies record the stage of tree-ring development at the moment when a high-energetic impact kills the cambium, stopping further cell production. We also assumed that tangential rows of traumatic resin ducts and wood density fluctuations within the growth ring could develop soon after injury. Debris-flow sampling was carried out at four different sites located in three valleys of the Monts-Valin, north of the Saguenay River (48°40¢–49°00¢ N, 70°00’–71°15¢ E), Québec (Canada). Fifty balsam fir (Abies balsamea) trees with scars dating back to 1996 were selected from a collection of 240 discs representing 12 debris-flows sites (Kaczka and Morin 2006). Major debris-flow events were recorded in the Saguenay region in 1996 as a result of severe rainstorms lasting from July 18–21 (199–202 Julian days). That known event was used to estimate the synchronism of three different proxies used in dendrogeomorphology to date debris-flow incidences, namely: (i) scars, (ii) tangential rows of traumatic resin ducts and (iii) density fluctuations.

Type de document:Chapitre de livre
Date:2010
Lieu de publication:New York
Identifiant unique:10.1007/978-90-481-8736-2_21
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences fondamentales
Éditeurs:Stoffel, Markus
Bollschweiler, Michelle
Butler, David R.
Luckman, Brian H.
Mots-clés:debris flow, density fluctuation, growth ring, tree Ring, wood formation
Déposé le:26 mai 2023 14:10
Dernière modification:26 mai 2023 14:10
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