Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island
Abstract Glaciological research on the ice cap to the north of Lake Hazen in northern Ellesmere Island was one of the main objectives of the Canadian I.G.Y. expedition to this area in 1957–1958. The method of nourishment of this ice cap and of Gilman Glacier, one of its southward-flowing outlets, wa...
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Cambridge University Press (CUP)
1960
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Online Access: | http://dx.doi.org/10.1017/s002214300002373x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002373X |
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crcambridgeupr:10.1017/s002214300002373x 2024-03-03T08:44:05+00:00 Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island Hattersley-Smith, G. 1960 http://dx.doi.org/10.1017/s002214300002373x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002373X en eng Cambridge University Press (CUP) Journal of Glaciology volume 3, issue 27, page 610-625 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1960 crcambridgeupr https://doi.org/10.1017/s002214300002373x 2024-02-08T08:37:11Z Abstract Glaciological research on the ice cap to the north of Lake Hazen in northern Ellesmere Island was one of the main objectives of the Canadian I.G.Y. expedition to this area in 1957–1958. The method of nourishment of this ice cap and of Gilman Glacier, one of its southward-flowing outlets, was studied in pit and bore hole profiles above and below the equilibrium line, which was found at an elevation of about 1,200 m. Between an elevation of about 1,450 and 2,000 m. accumulation is by firn formation, while between about 1,280 and 1,450 m. interfingering of firn and superimposed ice occurs. At 1,800 m. the mean annual accumulation over the past twenty years is estimated as 12.8 g. cm. –2 . On Gilman Glacier below the equilibrium line variations in density and crystal structure in an ice core to a depth of 25 m. are seen to depend on the proportion of firn to superimposed ice formed during accumulation. These variations correspond to past changes in the position of the equilibrium line. Englacial temperature measurements indicate a mean annual temperature of about –18.5° C. at an elevation of 1 ,040 m. A budget deficit for Gilman Glacier during two years of observations may be related to the increased summer melting of the last 20 years, deduced from pit studies at 1,800 m. Article in Journal/Newspaper Ellesmere Island Ice cap ice core Journal of Glaciology Lake Hazen Cambridge University Press Ellesmere Island Lake Hazen ENVELOPE(-71.017,-71.017,81.797,81.797) Gilman Glacier ENVELOPE(-70.610,-70.610,80.099,80.099) Journal of Glaciology 3 27 610 625 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Hattersley-Smith, G. Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
topic_facet |
Earth-Surface Processes |
description |
Abstract Glaciological research on the ice cap to the north of Lake Hazen in northern Ellesmere Island was one of the main objectives of the Canadian I.G.Y. expedition to this area in 1957–1958. The method of nourishment of this ice cap and of Gilman Glacier, one of its southward-flowing outlets, was studied in pit and bore hole profiles above and below the equilibrium line, which was found at an elevation of about 1,200 m. Between an elevation of about 1,450 and 2,000 m. accumulation is by firn formation, while between about 1,280 and 1,450 m. interfingering of firn and superimposed ice occurs. At 1,800 m. the mean annual accumulation over the past twenty years is estimated as 12.8 g. cm. –2 . On Gilman Glacier below the equilibrium line variations in density and crystal structure in an ice core to a depth of 25 m. are seen to depend on the proportion of firn to superimposed ice formed during accumulation. These variations correspond to past changes in the position of the equilibrium line. Englacial temperature measurements indicate a mean annual temperature of about –18.5° C. at an elevation of 1 ,040 m. A budget deficit for Gilman Glacier during two years of observations may be related to the increased summer melting of the last 20 years, deduced from pit studies at 1,800 m. |
format |
Article in Journal/Newspaper |
author |
Hattersley-Smith, G. |
author_facet |
Hattersley-Smith, G. |
author_sort |
Hattersley-Smith, G. |
title |
Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
title_short |
Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
title_full |
Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
title_fullStr |
Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
title_full_unstemmed |
Studies of Englacial Profiles in the Lake Hazen Area of Northern Ellesmere Island |
title_sort |
studies of englacial profiles in the lake hazen area of northern ellesmere island |
publisher |
Cambridge University Press (CUP) |
publishDate |
1960 |
url |
http://dx.doi.org/10.1017/s002214300002373x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300002373X |
long_lat |
ENVELOPE(-71.017,-71.017,81.797,81.797) ENVELOPE(-70.610,-70.610,80.099,80.099) |
geographic |
Ellesmere Island Lake Hazen Gilman Glacier |
geographic_facet |
Ellesmere Island Lake Hazen Gilman Glacier |
genre |
Ellesmere Island Ice cap ice core Journal of Glaciology Lake Hazen |
genre_facet |
Ellesmere Island Ice cap ice core Journal of Glaciology Lake Hazen |
op_source |
Journal of Glaciology volume 3, issue 27, page 610-625 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300002373x |
container_title |
Journal of Glaciology |
container_volume |
3 |
container_issue |
27 |
container_start_page |
610 |
op_container_end_page |
625 |
_version_ |
1792499556777197568 |