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(Article of periodic en Anglais - 2014)

Document title

Post-1850 changes in Glacier Benito, North Patagonian Icefield, Chile

Authors(s) and Affiliation(s)

WINCHESTER V. (1) ; SESSIONS M. (2) ; VALDIVIA CERDA J. (3) ; WÜNDRICH O. (4) ; CLEMMENS S. (5) ; GLASSER N.F. (5) ; NASH M. (6) ;
(1) Centre for the Environment, Univ., Oxford, ROYAUME-UNI
(2) ACT, Amaroo, AUSTRALIE
(3) Univ. Tecnologica Metropolitana (UTEM), Santiago, CHILI
(4) Colibri Ventura, Coyhaique, XI Region de Aysén, CHILI
(5) Inst. of Geography & Earth Sciences, Univ., Aberystwyth, ROYAUME-UNI
(6) Australian National Univ., ACT, AUSTRALIE

Abstract

Glacier Benito is a temperate outlet glacier on the west side of the North Patagonian Icefield. Rates of thinning and ablation were obtained using data collected in 1972/73 and subsequent data collected in 2007 and 2011. Ice-front recession rates were based on dendrochronological dating for the terminal moraines and aerial and satellite imagery of the ice front in 1944, 1998 and 2002. Between the first Benito survey in 1973 and 2007, the lower glacier thinned by nearly 150 m with a rate increasing between 2007 and 2011. Increases in ice movement and ablation were negligible. Ice front recession along the glacier's centre line from 1886 to 2002 was approximately 1860 m. Thereafter glacier asymmetry makes measurement along the glacier centre line unrepresentative of areal change until 1998 when symmetry was restored. From 1998 to 2002 the rate increased dramatically. Recession from the southern end of Benito's terminal moraine in the 1850s supports an early date for initial retreat of the Icefield's glaciers

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2014, vol. 96, no1 [pp. 43-59]

Bibliographic references : 2 p.

Collation : 7 fig., 6 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/geoa.12027

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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