GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreRecent volume and area changes of Kaskawulsh Glacier, Yukon, Canada
AuteurFoy, N; Copland, L; Zdanowicz, C; Demuth, M; Hopkinson, C
SourceJournal of Glaciology vol. 57, no. 203, 2011 p. 515-525, https://doi.org/10.3189/002214311796905596
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100139
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.3189/002214311796905596
Mediapapier
ProvinceYukon
SNRC115B; 115C
Lat/Long OENS-141.0000 -138.0000 61.0000 60.0000
Sujetsglaciers; levés glaciaires; photographie; imagerie par satellite; retrait de la glace; épaisseurs des glaces; concentration de glace; géologie des dépôts meubles/géomorphologie; géophysique
Illustrationslocation maps; plots; satellite images; tables; profiles
ProgrammeLes sciences de la Terre à l'appui de la caractérisation, à l'échelle nationale, des impacts des changements climatiques sur la masse continentale canadienne, Géosciences de changements climatiques
Résumé(disponible en anglais seulement)
Recent surface elevation changes of Kaskawulsh Glacier, Yukon, Canada, are quantified by comparing an air-photo derived DEM from 1977 and airborne lidar measurements from 1995, 2000 and 2007. Surface-area changes are assessed using historical aerial photography from 1956 and satellite imagery from 1977 to 2007. Combined, these measurements provide some of the first detailed records of volume change of a large Yukon glacier. Between 1977 and 2007, Kaskawulsh Glacier underwent a decrease in area of 1.53% and a decrease in volume of 3.27 - 5.94km3w.e.). The terminus also retreated by 655m over the period 1956 - 2007. There was relatively minor volume change over the period 1977 - 95 (<+0.01km3w.e. a-1), while over the periods 1995 - 2000 and 2000 - 07 volume losses occurred at a relatively constant rate of -0.51 and -0.50km3 a-1w.e., respectively. Since 1995, thinning has been prominent throughout the ablation zone, while relative stability and even slight thickening has occurred in the accumulation zone. These findings are similar to those recently observed at other nearby Alaskan glaciers.
GEOSCAN ID286126