Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut
A first approximation of ground ice volume for the area surrounding Eureka, Nunavut, indicates that it comprises 30.8% of the upper 5.9 m of permafrost. Volume depends on the type of ice examined, ranging from 1.8 to 69.0% in different regions of the study area. Excess ice makes up 17.7% of the tota...
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2000
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ftcanadathes:oai:collectionscanada.gc.ca:QMM.31213 2023-05-15T15:05:41+02:00 Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut Couture, Nicole J. Pollard, Wayne H. (advisor) Master of Science (Department of Geography.) 2000 application/pdf http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31213 en eng McGill University alephsysno: 001810507 proquestno: MQ70405 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31213 All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. Frozen ground -- Nunavut -- Ellesmere Island Global warming -- Environmental aspects -- Nunavut -- Ellesmere Island Thermokarst Electronic Thesis or Dissertation 2000 ftcanadathes 2014-02-16T00:51:00Z A first approximation of ground ice volume for the area surrounding Eureka, Nunavut, indicates that it comprises 30.8% of the upper 5.9 m of permafrost. Volume depends on the type of ice examined, ranging from 1.8 to 69.0% in different regions of the study area. Excess ice makes up 17.7% of the total volume of frozen materials in the study area. Melt of ground ice in the past has produced thermokarst features which include ground subsidence of up to 3.2 m, formation of tundra ponds, degradation of ice wedges, thaw slumps greater than 50 m across, gullying, and numerous active layer detachment slides. With a doubling of atmospheric carbon dioxide, the rise in mean annual temperatures for the area is projected to be 4.9 to 6.6°C, which would lengthen the thaw season and increase thaw depths by up to 70 cm. The expected geomorphic changes to the landscape are discussed. Thesis Arctic Ellesmere Island Eureka Global warming Ice Nunavut permafrost polar desert Thermokarst Tundra wedge* Theses Canada/Thèses Canada (Library and Archives Canada) Arctic Ellesmere Island Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Nunavut |
institution |
Open Polar |
collection |
Theses Canada/Thèses Canada (Library and Archives Canada) |
op_collection_id |
ftcanadathes |
language |
English |
topic |
Frozen ground -- Nunavut -- Ellesmere Island Global warming -- Environmental aspects -- Nunavut -- Ellesmere Island Thermokarst |
spellingShingle |
Frozen ground -- Nunavut -- Ellesmere Island Global warming -- Environmental aspects -- Nunavut -- Ellesmere Island Thermokarst Couture, Nicole J. Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
topic_facet |
Frozen ground -- Nunavut -- Ellesmere Island Global warming -- Environmental aspects -- Nunavut -- Ellesmere Island Thermokarst |
description |
A first approximation of ground ice volume for the area surrounding Eureka, Nunavut, indicates that it comprises 30.8% of the upper 5.9 m of permafrost. Volume depends on the type of ice examined, ranging from 1.8 to 69.0% in different regions of the study area. Excess ice makes up 17.7% of the total volume of frozen materials in the study area. Melt of ground ice in the past has produced thermokarst features which include ground subsidence of up to 3.2 m, formation of tundra ponds, degradation of ice wedges, thaw slumps greater than 50 m across, gullying, and numerous active layer detachment slides. With a doubling of atmospheric carbon dioxide, the rise in mean annual temperatures for the area is projected to be 4.9 to 6.6°C, which would lengthen the thaw season and increase thaw depths by up to 70 cm. The expected geomorphic changes to the landscape are discussed. |
author2 |
Pollard, Wayne H. (advisor) |
format |
Thesis |
author |
Couture, Nicole J. |
author_facet |
Couture, Nicole J. |
author_sort |
Couture, Nicole J. |
title |
Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
title_short |
Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
title_full |
Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
title_fullStr |
Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
title_full_unstemmed |
Sensitivity of permafrost terrain in a high Arctic polar desert : an evaluation of response to disturbance near Eureka, Ellesmere Island, Nunavut |
title_sort |
sensitivity of permafrost terrain in a high arctic polar desert : an evaluation of response to disturbance near eureka, ellesmere island, nunavut |
publisher |
McGill University |
publishDate |
2000 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31213 |
op_coverage |
Master of Science (Department of Geography.) |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Ellesmere Island Eureka Nunavut |
geographic_facet |
Arctic Ellesmere Island Eureka Nunavut |
genre |
Arctic Ellesmere Island Eureka Global warming Ice Nunavut permafrost polar desert Thermokarst Tundra wedge* |
genre_facet |
Arctic Ellesmere Island Eureka Global warming Ice Nunavut permafrost polar desert Thermokarst Tundra wedge* |
op_relation |
alephsysno: 001810507 proquestno: MQ70405 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31213 |
op_rights |
All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1766337331538690048 |