Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland
We present a 3-year record of seasonal variations in ice speed and frontal ablation of 10 marine-terminating outlet glaciers along the coast of Prudhoe Land in northwestern Greenland. The glaciers showed seasonal speedup initiated between late May and early June, and terminated between late June and...
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Language: | English |
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Online Access: | http://hdl.handle.net/2115/76923 https://doi.org/10.1017/jog.2019.81 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/76923 2023-05-15T15:08:37+02:00 Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland Sakakibara, Daiki Sugiyama, Shin http://hdl.handle.net/2115/76923 https://doi.org/10.1017/jog.2019.81 eng eng Cambridge University Press http://hdl.handle.net/2115/76923 Journal of glaciology, 66(255): 25-34 http://dx.doi.org/10.1017/jog.2019.81 https://creativecommons.org/licenses/by/4.0/ CC-BY Arctic glaciology glacier monitoring ice velocity remote sensing 450 article fthokunivhus https://doi.org/10.1017/jog.2019.81 2022-11-18T01:05:48Z We present a 3-year record of seasonal variations in ice speed and frontal ablation of 10 marine-terminating outlet glaciers along the coast of Prudhoe Land in northwestern Greenland. The glaciers showed seasonal speedup initiated between late May and early June, and terminated between late June and early July. Ice speed subsequently decreased from July to September. The timing of the speedup coincided with the onset of the air temperature rise to above freezing, suggesting an influence of meltwater availability on the glacier dynamics. No clear relationship was found between the speedup and the terminus position or the sea-ice/ice-melange conditions. These results suggest that the meltwater input to the glacier bed triggered the summer speedup. The excess of summer speed (June-August) over the mean for the rest of the year accounted for 0.5-13% of the annual ice motion. Several glaciers showed seasonal frontal variations, i.e. retreat in summer and advance in winter. This was not due to ice-speed variations, but was driven by seasonal variations in frontal ablation. The results demonstrate the dominant effect of glacier surface melting on the seasonal speedup, and the importance of seasonal speed patterns on longer-term ice motion of marine-terminating outlet glaciers in Greenland. Article in Journal/Newspaper Arctic glacier Greenland Journal of Glaciology Prudhoe land Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Greenland Prudhoe Land ENVELOPE(-67.528,-67.528,77.762,77.762) Journal of Glaciology 66 255 25 34 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Arctic glaciology glacier monitoring ice velocity remote sensing 450 |
spellingShingle |
Arctic glaciology glacier monitoring ice velocity remote sensing 450 Sakakibara, Daiki Sugiyama, Shin Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
topic_facet |
Arctic glaciology glacier monitoring ice velocity remote sensing 450 |
description |
We present a 3-year record of seasonal variations in ice speed and frontal ablation of 10 marine-terminating outlet glaciers along the coast of Prudhoe Land in northwestern Greenland. The glaciers showed seasonal speedup initiated between late May and early June, and terminated between late June and early July. Ice speed subsequently decreased from July to September. The timing of the speedup coincided with the onset of the air temperature rise to above freezing, suggesting an influence of meltwater availability on the glacier dynamics. No clear relationship was found between the speedup and the terminus position or the sea-ice/ice-melange conditions. These results suggest that the meltwater input to the glacier bed triggered the summer speedup. The excess of summer speed (June-August) over the mean for the rest of the year accounted for 0.5-13% of the annual ice motion. Several glaciers showed seasonal frontal variations, i.e. retreat in summer and advance in winter. This was not due to ice-speed variations, but was driven by seasonal variations in frontal ablation. The results demonstrate the dominant effect of glacier surface melting on the seasonal speedup, and the importance of seasonal speed patterns on longer-term ice motion of marine-terminating outlet glaciers in Greenland. |
format |
Article in Journal/Newspaper |
author |
Sakakibara, Daiki Sugiyama, Shin |
author_facet |
Sakakibara, Daiki Sugiyama, Shin |
author_sort |
Sakakibara, Daiki |
title |
Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
title_short |
Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
title_full |
Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
title_fullStr |
Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
title_full_unstemmed |
Seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of Prudhoe Land, northwestern Greenland |
title_sort |
seasonal ice-speed variations in 10 marine-terminating outlet glaciers along the coast of prudhoe land, northwestern greenland |
publisher |
Cambridge University Press |
url |
http://hdl.handle.net/2115/76923 https://doi.org/10.1017/jog.2019.81 |
long_lat |
ENVELOPE(-67.528,-67.528,77.762,77.762) |
geographic |
Arctic Greenland Prudhoe Land |
geographic_facet |
Arctic Greenland Prudhoe Land |
genre |
Arctic glacier Greenland Journal of Glaciology Prudhoe land Sea ice |
genre_facet |
Arctic glacier Greenland Journal of Glaciology Prudhoe land Sea ice |
op_relation |
http://hdl.handle.net/2115/76923 Journal of glaciology, 66(255): 25-34 http://dx.doi.org/10.1017/jog.2019.81 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/jog.2019.81 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
255 |
container_start_page |
25 |
op_container_end_page |
34 |
_version_ |
1766339942879854592 |