Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada
Temperatures were measured within the firn and ice of the upper reaches of the Seward Glacier (referred to in this paper as the "upper Seward Glacier") to a depth of 204 ft. (62.2 m.) by means of thermohms and a Wheatstone bridge. Thermal boring proved a feasible means of penetrating this...
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International Glaciological Society
1951
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ftcaltechauth:oai:authors.library.caltech.edu:5mm3d-a1n85 2024-06-23T07:53:05+00:00 Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada Sharp, Robert P. 1951 https://doi.org/10.3189/S0022143000026460 unknown International Glaciological Society https://doi.org/10.3189/S0022143000026460 oai:authors.library.caltech.edu:5mm3d-a1n85 eprintid:98571 resolverid:CaltechAUTHORS:20190911-091715861 info:eu-repo/semantics/openAccess Other Journal of Glaciology, 1(9), 476-487, (1951) info:eu-repo/semantics/article 1951 ftcaltechauth https://doi.org/10.3189/S0022143000026460 2024-06-12T02:16:01Z Temperatures were measured within the firn and ice of the upper reaches of the Seward Glacier (referred to in this paper as the "upper Seward Glacier") to a depth of 204 ft. (62.2 m.) by means of thermohms and a Wheatstone bridge. Thermal boring proved a feasible means of penetrating this glacier. The winter's chilled layer here develops a thickness of 40–50 ft. (12.2–15.2 m.) and attains temperatures of at least −13° C. Deterioration of the chilled Iayer is rapid and irregular in the final phase and is attributed largely to freezing of percolating melt water. Melt water exerts such a powerful influence on thermal regimen that bodies of firn in environments with mean annual temperatures below freezing may, nonetheless, be geophyaically temperate because of extensive warming by melt water in summer. In both 1948 and 1949, the annual chilled layer on the upper Seward Glacier disappeared within the first 10 days of July. The slow development and rapid deterioration of diurnal crusts on firn and the lag effects at depth reproduce in miniature the behavior of the annual chilled layer. On the basis of its thermal regimen the upper Seward Glacier is geophysically temperate. © 1951 International Glaciological Society. MS. received 24 June 1950. Division of Geological Sciences, California Institute of Technology, Contribution Number 543. Published - thermal_regimen_of_firn_on_upper_seward_glacier_yukon_territory_canada.pdf Article in Journal/Newspaper glacier* Journal of Glaciology Yukon Caltech Authors (California Institute of Technology) Canada Seward Glacier ENVELOPE(-140.304,-140.304,60.266,60.266) Wheatstone ENVELOPE(170.217,170.217,-72.617,-72.617) Yukon Journal of Glaciology 1 9 476 487 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
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ftcaltechauth |
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description |
Temperatures were measured within the firn and ice of the upper reaches of the Seward Glacier (referred to in this paper as the "upper Seward Glacier") to a depth of 204 ft. (62.2 m.) by means of thermohms and a Wheatstone bridge. Thermal boring proved a feasible means of penetrating this glacier. The winter's chilled layer here develops a thickness of 40–50 ft. (12.2–15.2 m.) and attains temperatures of at least −13° C. Deterioration of the chilled Iayer is rapid and irregular in the final phase and is attributed largely to freezing of percolating melt water. Melt water exerts such a powerful influence on thermal regimen that bodies of firn in environments with mean annual temperatures below freezing may, nonetheless, be geophyaically temperate because of extensive warming by melt water in summer. In both 1948 and 1949, the annual chilled layer on the upper Seward Glacier disappeared within the first 10 days of July. The slow development and rapid deterioration of diurnal crusts on firn and the lag effects at depth reproduce in miniature the behavior of the annual chilled layer. On the basis of its thermal regimen the upper Seward Glacier is geophysically temperate. © 1951 International Glaciological Society. MS. received 24 June 1950. Division of Geological Sciences, California Institute of Technology, Contribution Number 543. Published - thermal_regimen_of_firn_on_upper_seward_glacier_yukon_territory_canada.pdf |
format |
Article in Journal/Newspaper |
author |
Sharp, Robert P. |
spellingShingle |
Sharp, Robert P. Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
author_facet |
Sharp, Robert P. |
author_sort |
Sharp, Robert P. |
title |
Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
title_short |
Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
title_full |
Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
title_fullStr |
Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
title_full_unstemmed |
Thermal Regimen of Firn on Upper Seward Glacier, Yukon Territory, Canada |
title_sort |
thermal regimen of firn on upper seward glacier, yukon territory, canada |
publisher |
International Glaciological Society |
publishDate |
1951 |
url |
https://doi.org/10.3189/S0022143000026460 |
long_lat |
ENVELOPE(-140.304,-140.304,60.266,60.266) ENVELOPE(170.217,170.217,-72.617,-72.617) |
geographic |
Canada Seward Glacier Wheatstone Yukon |
geographic_facet |
Canada Seward Glacier Wheatstone Yukon |
genre |
glacier* Journal of Glaciology Yukon |
genre_facet |
glacier* Journal of Glaciology Yukon |
op_source |
Journal of Glaciology, 1(9), 476-487, (1951) |
op_relation |
https://doi.org/10.3189/S0022143000026460 oai:authors.library.caltech.edu:5mm3d-a1n85 eprintid:98571 resolverid:CaltechAUTHORS:20190911-091715861 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.3189/S0022143000026460 |
container_title |
Journal of Glaciology |
container_volume |
1 |
container_issue |
9 |
container_start_page |
476 |
op_container_end_page |
487 |
_version_ |
1802644576374095872 |