GEOSCAN, résultats de la recherche


TitreReconnaissance sub-bottom profiling studies of Peyto Lake, Banff National Park
AuteurMedioli, B E; Demuth, M N
SourceCommission géologique du Canada, Dossier public 5727, 2009, 1 feuille, (Accès ouvert)
Documentdossier public
Mediapapier; en ligne; numérique
Référence reliéeCette publication est reliée Medioli, B E; Demuth, M N; (2009). Sub-bottom profiling results from Peyto Lake, Banff National Park, Alberta, Commission géologique du Canada, Dossier public 5728
Formatspdf; JPEG2000
Lat/Long OENS-117.0000 -116.5000 51.7500 51.5000
Sujetsdépôts glaciaires; glaciers; sédiments de fond; dépôts de lacs glaciaires; lacs glaciaires; épaisseur des sediments lacustres; sediments lacustres; dépôts glaciolacustres; Holocène; budget hydrologique; hydrographie; fluctuations climatiques; climat; faciès; faciès sédimentaires; Glacier de Peyto ; géologie des dépôts meubles/géomorphologie; hydrogéologie; Quaternaire; Cénozoïque
Illustrationslocation maps; photographs; cross-sections; profiles
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
Bibliothèque de Ressources naturelles Canada - Calgary (Sciences de la Terre)
Bibliothèque de Ressources naturelles Canada - Québec (Sciences de la Terre)
Bibliothèque de Ressources naturelles Canada - Vancouver (Sciences de la Terre)
Commission géologique du Canada (Atlantique)
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
Diffusé2009 06 08
Résumé(disponible en anglais seulement)
Recent studies have pointed to significant negative flow trends in the glacierized catchments of Canada's Southern Cordillera. These trends and a reduction in the flow regulation effect of glacier cover are due to marked reductions in the aerial extent of glaciers over the last half of the 20th Century (Hopkinson and Young 1998; Moore and Demuth 2001; Demuth and Pietroniro 2002; and Stahl and Moore 2006). These conclusions are the result of analyses conducted using the available instrumental records describing summer month river flows.
In the context of water resources, and to better define the warmdry climate episode adaptation limits provided by the presence of glaciers, it is desirable to place these observations within the perspective of glacier fluctuations that have taken place over the last several millennia. In several instances recent and paleoglacier fluctuations from direct or proxy evidence have been well documented. For example, Demuth (1997), Demuth and Keller (2006), Hopkinson and Demuth (2006), Luckman (2006), and Watson and Luckman (2004) provide such evidence for Peyto Glacier. Peyto Glacier is situated in the eastern slopes of the Canadian Rocky Mountains and provides flow to the North Saskatchewan River Basin. This glacierized mountainous headwater region plays a critical role in providing orographically derived precipitation, seasonal snowmelt and glacier melt to natural and human systems downstream.