Mots-clés
Arctique Changement climatique Dynamique glaciaire Echosondage Glacier Géophysique Image radar Modèle numérique Nordaustlandet Région polaire Svalbard Zone froide Arctic Region Climatic change Cold area Echosounding Geophysics Glacier Glacier dynamics Numerical model Polar region Radar imagery Svalbard Cambio climático Dinámica glaciar Ecosondeo Geofísica Helero Imagen radar Modelo numérico Región polar Zona fría ÁrticaIce thickness and basal conditions of Vestfonna ice cap, eastern Svalbard
The International Polar Year project Kinnvika - Arctic warming and impact research at 80° N
Auteur(s) et Affiliation(s)
PETTERSSON, R.
Dep. of Earth Sciences, Univ., Uppsala, Suede
CHRISTOFFERSEN, P.
Scott Polar Research Inst., Dept. of Geography, Univ., Cambridge, Royaume-Uni
DOWDESWELL, J.A.
Scott Polar Research Inst., Dept. of Geography, Univ., Cambridge, Royaume-Uni
POHJOLA, V.A.
Dep. of Earth Sciences, Univ., Uppsala, Suede
HUBBARD, A.
Inst. of Geography and Earth Sciences, Univ. of Wales, Aberystwyth, Royaume-Uni
STROZZI, T.
Gamma Remote Sensing, Gümligen, Suisse
POHJOLA, V.
Dep. of Earth Sciences, Univ., Uppsala, Suede
KANKAANPÄÄ, P.
Arctic Centre, Univ. of Lapland, Rovaniemi, Finlande
MOORE, J.C.
Dep. of Earth Sciences, Univ., Uppsala, Suede
Arctic Centre, Univ. of Lapland, Rovaniemi, Finlande
College of Global Change and Earth System Science, Normal Univ., Beijing, Chine
PASTUSIAK, T.
Maritime Univ., Gdynia, Pologne
Description :
The AA. combined ground-based pulsed radar data collected in 2008–2009 with airborne radio-echo sounding data acquired in 1983 and 1986 over Vestfonna ice cap, Svalbard. The airborne dataset mainly covers the fast-flowing outlet glaciers and the marginal zone, while the ground-based data explicitly cover the interior part of the ice cap. The data presented here are thus the first complete estimate of bed topography and ice thickness. The need to include more volume observations in the derivations of volume-area scaling parameters is emphasized. Basal reflectivity values suggest that fast-flowing outlet glaciers are underlain by temperate conditions. The geometric boundaries and basal conditions for Vestfonna will be critical additions to the development of numerical models of the ice cap and to the estimation of more accurate area-volume scaling parameters.
Type de document :
Article de monographie
Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2011, vol. 93, n°. 4, p. 311-322, nombre de pages : 12, Références bibliographiques : 2 p.
Date :
2011
Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)