Glacial hydraulic tremor on Rhonegletscher, Switzerland
Glacial hydraulic tremor (GHT) can be monitored to observe changes in location and distribution of water flow beneath glacial ice, allowing the spatiotemporal evolution of subglacial hydrology to be studied continuously and remotely. We use frequency-dependent polarization analysis (FDPA) to classif...
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Cambridge University Press
2023
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Online Access: | https://doi.org/10.1017/jog.2022.69 https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50 |
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ftdoajarticles:oai:doaj.org/article:7c304b9edac741b7af9b49e8364beb50 2023-05-15T16:57:37+02:00 Glacial hydraulic tremor on Rhonegletscher, Switzerland Elisabeth Clyne Richard B. Alley Margot Vore Dominik Gräff Sridhar Anandakrishnan Fabian Walter Amandine Sergeant 2023-04-01T00:00:00Z https://doi.org/10.1017/jog.2022.69 https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000697/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.69 0022-1430 1727-5652 https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50 Journal of Glaciology, Vol 69, Pp 370-380 (2023) Glacier hydrology mountain glaciers seismicity seismics Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.69 2023-03-19T01:31:51Z Glacial hydraulic tremor (GHT) can be monitored to observe changes in location and distribution of water flow beneath glacial ice, allowing the spatiotemporal evolution of subglacial hydrology to be studied continuously and remotely. We use frequency-dependent polarization analysis (FDPA) to classify types of GHT and assess its spatio-temporal extent beneath Rhonegletscher, Switzerland, in a continuous seismic record through 2018 and 2019 at three ice-proximal bedrock-based seismometers. We determine the frequency bands composing the GHT and calculate back azimuth angles pointing to a previously known subglacial channel. We also inspect the relationship between GHT seismic power and water discharge from the glacier to compare daily and seasonal shifts with the observed GHT. We observed the seasonal shift from a distributed system to a channelized system, and our dataset allowed comparison of channel locations within and across seasons, with implications for sediment evacuation and bed erosion. The successful use of this method to assess GHT previously on Taku glacier (the methods of which this project follows) and now Rhonegletscher shows that existing ice-proximal passive seismic installations can be used to easily and continuously monitor subglacial hydraulic activity. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Taku ENVELOPE(-133.854,-133.854,59.633,59.633) Journal of Glaciology 69 274 370 380 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier hydrology mountain glaciers seismicity seismics Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier hydrology mountain glaciers seismicity seismics Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Elisabeth Clyne Richard B. Alley Margot Vore Dominik Gräff Sridhar Anandakrishnan Fabian Walter Amandine Sergeant Glacial hydraulic tremor on Rhonegletscher, Switzerland |
topic_facet |
Glacier hydrology mountain glaciers seismicity seismics Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Glacial hydraulic tremor (GHT) can be monitored to observe changes in location and distribution of water flow beneath glacial ice, allowing the spatiotemporal evolution of subglacial hydrology to be studied continuously and remotely. We use frequency-dependent polarization analysis (FDPA) to classify types of GHT and assess its spatio-temporal extent beneath Rhonegletscher, Switzerland, in a continuous seismic record through 2018 and 2019 at three ice-proximal bedrock-based seismometers. We determine the frequency bands composing the GHT and calculate back azimuth angles pointing to a previously known subglacial channel. We also inspect the relationship between GHT seismic power and water discharge from the glacier to compare daily and seasonal shifts with the observed GHT. We observed the seasonal shift from a distributed system to a channelized system, and our dataset allowed comparison of channel locations within and across seasons, with implications for sediment evacuation and bed erosion. The successful use of this method to assess GHT previously on Taku glacier (the methods of which this project follows) and now Rhonegletscher shows that existing ice-proximal passive seismic installations can be used to easily and continuously monitor subglacial hydraulic activity. |
format |
Article in Journal/Newspaper |
author |
Elisabeth Clyne Richard B. Alley Margot Vore Dominik Gräff Sridhar Anandakrishnan Fabian Walter Amandine Sergeant |
author_facet |
Elisabeth Clyne Richard B. Alley Margot Vore Dominik Gräff Sridhar Anandakrishnan Fabian Walter Amandine Sergeant |
author_sort |
Elisabeth Clyne |
title |
Glacial hydraulic tremor on Rhonegletscher, Switzerland |
title_short |
Glacial hydraulic tremor on Rhonegletscher, Switzerland |
title_full |
Glacial hydraulic tremor on Rhonegletscher, Switzerland |
title_fullStr |
Glacial hydraulic tremor on Rhonegletscher, Switzerland |
title_full_unstemmed |
Glacial hydraulic tremor on Rhonegletscher, Switzerland |
title_sort |
glacial hydraulic tremor on rhonegletscher, switzerland |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.69 https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50 |
long_lat |
ENVELOPE(-133.854,-133.854,59.633,59.633) |
geographic |
Taku |
geographic_facet |
Taku |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 370-380 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000697/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.69 0022-1430 1727-5652 https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50 |
op_doi |
https://doi.org/10.1017/jog.2022.69 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
274 |
container_start_page |
370 |
op_container_end_page |
380 |
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1766049173866545152 |