Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland
To better understand recent rapid recession of marine-terminating glaciers in Greenland, we performed satellite and field observations near the calving front of Bowdoin Glacier, a 3 km wide outlet glacier in northwestern Greenland. Satellite data revealed a clear transition to a rapidly retreating p...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
International Glaciological Society (IGS)
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/60153 https://doi.org/10.3189/2015JoG14J127 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/60153 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/60153 2023-05-15T15:07:09+02:00 Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland Sugiyama, Shin Sakakibara, Daiki Tsutaki, Shun Maruyama, Mihiro Sawagaki, Takanobu http://hdl.handle.net/2115/60153 https://doi.org/10.3189/2015JoG14J127 eng eng International Glaciological Society (IGS) http://www.igsoc.org/ http://hdl.handle.net/2115/60153 Journal of glaciology, 61(226): 223-232 http://dx.doi.org/10.3189/2015JoG14J127 © 2015 International Glaciological Society Arctic glaciology glacier calving glacier flow ice/ocean interactions subglacial processes article fthokunivhus https://doi.org/10.3189/2015JoG14J127 2022-11-18T01:03:31Z To better understand recent rapid recession of marine-terminating glaciers in Greenland, we performed satellite and field observations near the calving front of Bowdoin Glacier, a 3 km wide outlet glacier in northwestern Greenland. Satellite data revealed a clear transition to a rapidly retreating phase in 2008 from a relatively stable glacier condition that lasted for >20 years. Ice radar measurements showed that the glacier front is grounded, but very close to the floating condition. These results, in combination with the results of ocean depth soundings, suggest bed geometry in front of the glacier is the primary control on the rate and pattern of recent rapid retreat. Presumably, glacier thinning due to atmospheric and/or ocean warming triggered the initial retreat. In situ measurements showed complex short-term ice speed variations, which were correlated with air temperature, precipitation and ocean tides. Ice speed quickly responded to temperature rise and a heavy rain event, indicating rapid drainage of surface water to the bed. Semi-diurnal speed peaks coincided with low tides, suggesting the major role of the hydrostatic pressure acting on the calving face in the force balance. These observations demonstrate that the dynamics of Bowdoin Glacier are sensitive to small perturbations occurring near the calving front. Article in Journal/Newspaper Arctic glacier Greenland Journal of Glaciology Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Bowdoin ENVELOPE(-69.317,-69.317,77.683,77.683) Greenland Journal of Glaciology 61 226 223 232 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Arctic glaciology glacier calving glacier flow ice/ocean interactions subglacial processes |
spellingShingle |
Arctic glaciology glacier calving glacier flow ice/ocean interactions subglacial processes Sugiyama, Shin Sakakibara, Daiki Tsutaki, Shun Maruyama, Mihiro Sawagaki, Takanobu Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
topic_facet |
Arctic glaciology glacier calving glacier flow ice/ocean interactions subglacial processes |
description |
To better understand recent rapid recession of marine-terminating glaciers in Greenland, we performed satellite and field observations near the calving front of Bowdoin Glacier, a 3 km wide outlet glacier in northwestern Greenland. Satellite data revealed a clear transition to a rapidly retreating phase in 2008 from a relatively stable glacier condition that lasted for >20 years. Ice radar measurements showed that the glacier front is grounded, but very close to the floating condition. These results, in combination with the results of ocean depth soundings, suggest bed geometry in front of the glacier is the primary control on the rate and pattern of recent rapid retreat. Presumably, glacier thinning due to atmospheric and/or ocean warming triggered the initial retreat. In situ measurements showed complex short-term ice speed variations, which were correlated with air temperature, precipitation and ocean tides. Ice speed quickly responded to temperature rise and a heavy rain event, indicating rapid drainage of surface water to the bed. Semi-diurnal speed peaks coincided with low tides, suggesting the major role of the hydrostatic pressure acting on the calving face in the force balance. These observations demonstrate that the dynamics of Bowdoin Glacier are sensitive to small perturbations occurring near the calving front. |
format |
Article in Journal/Newspaper |
author |
Sugiyama, Shin Sakakibara, Daiki Tsutaki, Shun Maruyama, Mihiro Sawagaki, Takanobu |
author_facet |
Sugiyama, Shin Sakakibara, Daiki Tsutaki, Shun Maruyama, Mihiro Sawagaki, Takanobu |
author_sort |
Sugiyama, Shin |
title |
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
title_short |
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
title_full |
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
title_fullStr |
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
title_full_unstemmed |
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland |
title_sort |
glacier dynamics near the calving front of bowdoin glacier, northwestern greenland |
publisher |
International Glaciological Society (IGS) |
url |
http://hdl.handle.net/2115/60153 https://doi.org/10.3189/2015JoG14J127 |
long_lat |
ENVELOPE(-69.317,-69.317,77.683,77.683) |
geographic |
Arctic Bowdoin Greenland |
geographic_facet |
Arctic Bowdoin Greenland |
genre |
Arctic glacier Greenland Journal of Glaciology |
genre_facet |
Arctic glacier Greenland Journal of Glaciology |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/60153 Journal of glaciology, 61(226): 223-232 http://dx.doi.org/10.3189/2015JoG14J127 |
op_rights |
© 2015 International Glaciological Society |
op_doi |
https://doi.org/10.3189/2015JoG14J127 |
container_title |
Journal of Glaciology |
container_volume |
61 |
container_issue |
226 |
container_start_page |
223 |
op_container_end_page |
232 |
_version_ |
1766338714191003648 |