Stratigraphic Studies of the Winter Snow Layer, Mount Logan, St. Elias Range

A traverse of King Trench, which rises from Upper Ogilvie Glacier (2300 m) to King Col (4500 m) a distance of 16 km, Yukon Territory, was made for US Army CRREL, June 1965, to see if techniques of stratiographic analysis of snow and firn could be successfully applied to studies of the alpine climate...

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Bibliographic Details
Published in:ARCTIC
Main Authors: Alford, Donald, Keeler, Charles
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 1968
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Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66318
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Summary:A traverse of King Trench, which rises from Upper Ogilvie Glacier (2300 m) to King Col (4500 m) a distance of 16 km, Yukon Territory, was made for US Army CRREL, June 1965, to see if techniques of stratiographic analysis of snow and firn could be successfully applied to studies of the alpine climate, as they have been on the Greenland ice sheet, Data on near-surface snow accumulation, temperature and density from eight pits along the traverse provide a climatological model which relates the variations in snow properties to localized topographic obstruction or enhancement of katabatic air drainage. Limited conclusions suggest directions for future study rather than for application to other large ranges or even other parts of St.Elias Range: topography may be the most important control in determining the areal distribution of near-surface climatic elements in mountains; extrapolation of climatological parameters to mountain slopes from nearby valley stations or free-air soundings is not a valid approach: analysis of pertinent stratiographic parameters of the alpine snow pack may be a useful approach to study of local mountain climates. Études stratigraphiques de la couche de neige hivernale, Mont Logan, chaîne de Saint-Élie. Les auteurs présentent les résultats d'une étude par cheminement des propriétés de la neige infra-superficielle, dans la zone de la King Trench, sur le mont Logan, chaîne de Saint-Élie. En supposant que ces propriétés de la neige sont liées aux processus thermodynamiques agissant pendant la période de déposition, les auteurs proposent un modèle climatologique de la King Trench qui relie les variations observées dans les propriétés de la neige le long du cheminement à une augmentation ou une rétention topographique localisée de l'écoulement catabatique de l'air. Les auteurs supposent qu'au voisinage de la surface des pentes couvertes de neige, le climat peut généralement être partiellement déduit de l'interaction entre la topographie locale et l'écoulement catabatique de l'air.