Glacier retreat and landform production on an overdeepened glacier foreland : the debris-charged glacial landsystem at Kvíárjökull, Iceland

Auteur(s) et Affiliation(s)



Description :
Glacier recession and landform development in a debris-charged glacial landsystem characterized by an overdeepening is quantified using digital photogrammetry, digital elevation model (DEM) construction and mapping of the Icelandic glacier Kvíárjökull for the period 1945-2003. Melting of ice-cores is recorded by different surface lowering rates). The distribution/preservation of pushed and stacked ice-cored moraine complexes are determined by the location of the long-term glacial drainage network in combination with retreat from the overdeepening, into which glacifluvial sediment is being directed and where debris-rich ice masses are being reworked and replaced by esker networks produced in englacial meltwater pathways that bypassed the overdeepening and connected to outwash fans prograding over the snout. Recent accelerated retreat of Kvíárjökull, potentially due to increased mass balance sensitivity, has made the snout highly unstable, especially now that the overdeepening is being uncovered and the snout flooded by an expanding pro-glacial, and partially supraglacial, lake.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 15, p. 1584-1602, nombre de pages : 19, Références bibliographiques : 1 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley