Lake-ice blisters, Terra Nova Bay area, Northern Victoria Land, Antarctica

Auteur(s) et Affiliation(s)

GUGLIELMIN, M.

DBSF, Insubria Univ., Varese, Italie

LEWKOWICZ, A.G.

Dep. of Geography, Univ. of Ontario, Ottawa, Canada

FRENCH, H.M.

Dep. of Geography and Earth Sciences, Univ. Ontario, Ottawa, Canada

STRINI, A.

Dip. Scienze della Terra, Univ., Milano, Italie

Description :
Ice blisters develop annually on perennially frozen lakes in Northern Victoria Land. They are believed to be caused by hydrostatic pressures generated through progressive freezing of solute-rich water beneath the lake-ice cover during winter. Lake-ice blisters in the study area differ from icing blisters described from the northern hemisphere. The latter are caused by hydraulic pessures and are found at locations such as river beds or spring sites on sloping terrain. The Antarctic lake-ice blisters reflect the occurrence of dry-based perennially frozen lakes with high salt contents in an extremely cold and arid environment.

Type de document :
Article de périodique

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2009, vol. 91, n°. 2, p. 99-111, nombre de pages : 13, Références bibliographiques : 27 ref.

Date :
2009

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
Anglais