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The Thermal Regime of Trapridge Glacier and its Relevance to Glacier Surging

  • Gary T. Jarvis. (a1) and Garry K. C. Clarke

Abstract

A deep-ice temperature measurement program has been conducted on Trapridge Glacier, Yukon Territory. Large regions of temperate ice are predicted at the base of the otherwise cold glacier, The glacier snout, frozen to bedrock, appears to act as an ice dam allowing the build up of an ice reservoir in the upper regions. Thermal regulation of the surges of Trapridge Glacier is suggested and the relevance of basal temperatures in large surging glaciers is discussed.

Résumé

Un programme de mesure de la température de la glace profonde a été mis en route sur le Trapridge Glacier dans le Territoire du Yukon. L’ existence de grandes zones de glace tempérée est probable à la base d’ un glacier froid par ailleurs. Le front du glacier, collé au bedrock par Le gel, semble jouer le rôle d’ un barrage permettant la construction d’ un réservoir de glace dans les régions supérieures. La régulation thermique des crues soudaines du Trapridge Glacier est l’ hypothèse suggérée, et l’ on discute les rapports de la température basale avec les fortes crues subites du glacier.

Zusammenfassung

Am Trapridge-Glaciers, Yukon Territorium, wurden Temperaturmessungen des Eises in grösseren Tiefen durchgeführt. Sie lassen die Annahme zu, dass an der Basis des im übrigen kalten Gletschers sich grosse Bereiche temperierten Eises befinden. Die Gletscherzunge ist am Untergrund angefroren und scheint dammartig die Bildung eines Eisreservoirs in den oberen Regionen zu ermöglichen. Es wird angenommen, dass die Ausbrüche des Trapridge- Glaciers thermisch bedingt sind. Dies führt zu einer Diskussion der Bedeutung der Temperatur am Untergrund von grossen, ausbrechenden Gletschern.

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References

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