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Recent Climatic Fluctuations Of The Canadian High Arctic And Their Significance For Glaciology, Raymond S. Bradley, John England
Recent Climatic Fluctuations Of The Canadian High Arctic And Their Significance For Glaciology, Raymond S. Bradley, John England
Raymond S Bradley
Various measures of the character of ablation season conditions in the Canadian High Arctic (north of 74°N) are discussed based on an analysis of daily climatic data from Alert, Eureka, Isachsen, Resolute, and Thule. Melting degree day totals appear to be the most useful index of "summer warmth." An abrupt change in the summer climate of the region occurred around 1963164. Various indices indicate a marked decrease in summer temperature after 1963. During the same period, annual precipitation in the north and northwest has increased. Glacier mass balance is strongly controlled by summer climate; in particular, annual melting degree day …
Former Ice Shelves In The Canadian High Arctic, John England, Raymond S. Bradley, G. H. Miller
Former Ice Shelves In The Canadian High Arctic, John England, Raymond S. Bradley, G. H. Miller
Raymond S Bradley
ABSTRACT. Moraines deposited by the outermost ice advance across Judge Daly Promontory, northeastern Ellesmere Island, reflect thin, topographically controlled ice lobes extending to sea-level. The termini of two ice lobes were investigated and both produced ice shelves where they flowed into isostatically depressed embayments along western Kennedy Channel. Morphological evidence for these ice shelves occurs at the entrance to these valleys where steeply descending lateral moraines become abruptly horizontal for 2 km. In addition, both the horizontal moraines and associated pro-glacial terraces are fossiliferous downvalley from the apparent grounding line. Based on the differences in elevation between the horizontal moraines …