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(Article of periodic en Anglais - 2012)

Document title

Interactions between seasonal snow cover, ground surface temperature and topography (Andes of Santiago, Chile, 33.5°S)

Authors(s) and Affiliation(s)

APALOO J. (1) ; BRENNING A. (1) ; BODIN X. (2 3) ;
(1) Dept. of Geography and Environmental Management, Univ. Ontario, Waterloo, CANADA
(2) Inst. de Geografia, Pontificia Univ. Católica de Chile, Santiago, CHILI
(3) Lab. EDYTEM - UMR 5204 CNRS, Le Bourget-du-Lac, FRANCE

Abstract

Two one-year (2009-10 and 2010-11) ground surface temperature (GST) time series are analysed separately and linear mixed-effects models are used to quantify the effects of site characteristics (a high-altitude catchment of the Andes of Santiago) on mean GST (MGST) and ground surface thermal regimes. The effect of snow cover onset and disappearance dates on MGST is further examined in a sensitivity analysis. The results corroborate the effect of late snow cover in the linear models, which can overwhelm the spatial differences in radiative effects. A positive MGST found on active rock glaciers would suggest negative thermal offsets probably related to the presence of coarse blocky material at the surface, and which may also be present outside rock glaciers. The AA. suggest that spatial patterns of MGST can serve as a proxy for spatial patterns in the lower limit of permafrost occurrence

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2012, vol. 23, no4 [pp. 277-291]

Bibliographic references : 1 p.

Collation : 4 fig., 5 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1753

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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