Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia
To investigate short-term flow-pattern variations of a temperate glacier, longitudinal surface strain was measured with a wire strainmeter in the ablation area of Koryto glacier, Kamchatka, Russia. Strain-rate anomalies were observed in late summer 2000 that were triggered by a water overflow from a...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/34780 2023-05-15T13:29:11+02:00 Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia Sugiyama, Shin Naruse, Renji Murav'yev, Yaroslav D. http://hdl.handle.net/2115/34780 https://doi.org/10.3189/172756405781813627 eng eng International Glaciological Society http://www.igsoc.org/ http://hdl.handle.net/2115/34780 Annals of Glaciology, 40: 232-236 http://dx.doi.org/10.3189/172756405781813627 © 2005 International Glaciological Society 452 article fthokunivhus https://doi.org/10.3189/172756405781813627 2022-11-18T01:01:39Z To investigate short-term flow-pattern variations of a temperate glacier, longitudinal surface strain was measured with a wire strainmeter in the ablation area of Koryto glacier, Kamchatka, Russia. Strain-rate anomalies were observed in late summer 2000 that were triggered by a water overflow from a moulin near the measurement site followed by the drainage of accumulated water. The strain event started with (compressive) strain rates of >–10–3 d–1 lasting for 6 hours, which then became tensile. Similar strain-rate variations were observed again on the next day. During the event, basal sliding speed measured at the margin in the lower reach of the glacier fluctuated by about ±50% of the daily mean. Smaller and larger sliding speeds corresponded to the compressive and tensile surface strains, respectively. These measurements suggest that the storage and sudden drainage of water caused spatially non-uniform water-pressure fluctuations along the glacier, changing the sliding regime over short time periods. Article in Journal/Newspaper Annals of Glaciology glacier Kamchatka Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Annals of Glaciology 40 232 236 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Sugiyama, Shin Naruse, Renji Murav'yev, Yaroslav D. Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
topic_facet |
452 |
description |
To investigate short-term flow-pattern variations of a temperate glacier, longitudinal surface strain was measured with a wire strainmeter in the ablation area of Koryto glacier, Kamchatka, Russia. Strain-rate anomalies were observed in late summer 2000 that were triggered by a water overflow from a moulin near the measurement site followed by the drainage of accumulated water. The strain event started with (compressive) strain rates of >–10–3 d–1 lasting for 6 hours, which then became tensile. Similar strain-rate variations were observed again on the next day. During the event, basal sliding speed measured at the margin in the lower reach of the glacier fluctuated by about ±50% of the daily mean. Smaller and larger sliding speeds corresponded to the compressive and tensile surface strains, respectively. These measurements suggest that the storage and sudden drainage of water caused spatially non-uniform water-pressure fluctuations along the glacier, changing the sliding regime over short time periods. |
format |
Article in Journal/Newspaper |
author |
Sugiyama, Shin Naruse, Renji Murav'yev, Yaroslav D. |
author_facet |
Sugiyama, Shin Naruse, Renji Murav'yev, Yaroslav D. |
author_sort |
Sugiyama, Shin |
title |
Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
title_short |
Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
title_full |
Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
title_fullStr |
Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
title_full_unstemmed |
Surface strain anomaly induced by the storage and drainage of englacial water in Koryto glacier, Kamchatka, Russia |
title_sort |
surface strain anomaly induced by the storage and drainage of englacial water in koryto glacier, kamchatka, russia |
publisher |
International Glaciological Society |
url |
http://hdl.handle.net/2115/34780 https://doi.org/10.3189/172756405781813627 |
genre |
Annals of Glaciology glacier Kamchatka |
genre_facet |
Annals of Glaciology glacier Kamchatka |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/34780 Annals of Glaciology, 40: 232-236 http://dx.doi.org/10.3189/172756405781813627 |
op_rights |
© 2005 International Glaciological Society |
op_doi |
https://doi.org/10.3189/172756405781813627 |
container_title |
Annals of Glaciology |
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40 |
container_start_page |
232 |
op_container_end_page |
236 |
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1765999129305022464 |