Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada
ABSTRACT Previous studies reported that Good Friday Glacier had been actively surging in the 1950–60s, 1990s and again in 2000–15. Based on observations of terminus position change from air photos and satellite imagery, we fill the gaps between previous studies and conclude that the glacier has been...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1017/jog.2019.21 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000212 |
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crcambridgeupr:10.1017/jog.2019.21 2024-03-03T08:42:03+00:00 Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada MEDRZYCKA, DOROTA COPLAND, LUKE VAN WYCHEN, WESLEY BURGESS, DAVID 2019 http://dx.doi.org/10.1017/jog.2019.21 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000212 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 65, issue 251, page 440-452 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2019.21 2024-02-08T08:35:39Z ABSTRACT Previous studies reported that Good Friday Glacier had been actively surging in the 1950–60s, 1990s and again in 2000–15. Based on observations of terminus position change from air photos and satellite imagery, we fill the gaps between previous studies and conclude that the glacier has been advancing continuously since 1959. Ice surface velocities extracted from optical and synthetic aperture radar satellite images show higher flow rates than on most other marine-terminating glaciers in the region. This behaviour contrasts with the regional trend of glacier retreat over this period. Possible explanations involve a delayed response to positive mass-balance conditions of the Little Ice Age, or a dynamic instability. There is, however, insufficient evidence to attribute this behaviour to classical glacier surging as suggested in previous studies. Based on present-day ice velocity and glacier geometry patterns in the terminus region, we reconstruct the evolution of ice motion throughout the advance, and suggest that what has previously been interpreted as a surge, may instead have been a localised response to small-scale perturbations in bedrock topography. Article in Journal/Newspaper Arctic Axel Heiberg Island glacier* Journal of Glaciology Cambridge University Press Arctic Canada Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Journal of Glaciology 65 251 440 452 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes MEDRZYCKA, DOROTA COPLAND, LUKE VAN WYCHEN, WESLEY BURGESS, DAVID Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT Previous studies reported that Good Friday Glacier had been actively surging in the 1950–60s, 1990s and again in 2000–15. Based on observations of terminus position change from air photos and satellite imagery, we fill the gaps between previous studies and conclude that the glacier has been advancing continuously since 1959. Ice surface velocities extracted from optical and synthetic aperture radar satellite images show higher flow rates than on most other marine-terminating glaciers in the region. This behaviour contrasts with the regional trend of glacier retreat over this period. Possible explanations involve a delayed response to positive mass-balance conditions of the Little Ice Age, or a dynamic instability. There is, however, insufficient evidence to attribute this behaviour to classical glacier surging as suggested in previous studies. Based on present-day ice velocity and glacier geometry patterns in the terminus region, we reconstruct the evolution of ice motion throughout the advance, and suggest that what has previously been interpreted as a surge, may instead have been a localised response to small-scale perturbations in bedrock topography. |
format |
Article in Journal/Newspaper |
author |
MEDRZYCKA, DOROTA COPLAND, LUKE VAN WYCHEN, WESLEY BURGESS, DAVID |
author_facet |
MEDRZYCKA, DOROTA COPLAND, LUKE VAN WYCHEN, WESLEY BURGESS, DAVID |
author_sort |
MEDRZYCKA, DOROTA |
title |
Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
title_short |
Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
title_full |
Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
title_fullStr |
Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
title_full_unstemmed |
Seven decades of uninterrupted advance of Good Friday Glacier, Axel Heiberg Island, Arctic Canada |
title_sort |
seven decades of uninterrupted advance of good friday glacier, axel heiberg island, arctic canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2019.21 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000212 |
long_lat |
ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-91.001,-91.001,79.752,79.752) |
geographic |
Arctic Canada Heiberg Axel Heiberg Island |
geographic_facet |
Arctic Canada Heiberg Axel Heiberg Island |
genre |
Arctic Axel Heiberg Island glacier* Journal of Glaciology |
genre_facet |
Arctic Axel Heiberg Island glacier* Journal of Glaciology |
op_source |
Journal of Glaciology volume 65, issue 251, page 440-452 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2019.21 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
251 |
container_start_page |
440 |
op_container_end_page |
452 |
_version_ |
1792497560531763200 |