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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International Glaciological Society
2023
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/566566 2023-06-06T11:55:53+02:00 Glacial hydraulic tremor on Rhonegletscher, Switzerland Clyne, Elisabeth Alley, Richard B. Vore, Margot Gräff, Dominik Anandakrishnan, Sridhar Walter, Fabian Thomas Sergeant, Amandine 2023-04 application/application/pdf https://hdl.handle.net/20.500.11850/566566 https://doi.org/10.3929/ethz-b-000566566 en eng International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2022.69 info:eu-repo/semantics/altIdentifier/wos/000841626200001 info:eu-repo/grantAgreement/SNF/SNF-Förderungsprofessuren: Fortsetzungsgesuche/183719 info:eu-repo/grantAgreement/ETHZ/ETH Grants/ETH-06 16-2 http://hdl.handle.net/20.500.11850/566566 doi:10.3929/ethz-b-000566566 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Journal of Glaciology, 69 (274) Glacier hydrology mountain glaciers seismicity seismics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftethz https://doi.org/20.500.11850/56656610.3929/ethz-b-00056656610.1017/jog.2022.69 2023-04-16T23:45:06Z 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. ISSN:0022-1430 ISSN:1727-5652 Article in Journal/Newspaper Journal of Glaciology ETH Zürich Research Collection Taku ENVELOPE(-133.854,-133.854,59.633,59.633) |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Glacier hydrology mountain glaciers seismicity seismics |
spellingShingle |
Glacier hydrology mountain glaciers seismicity seismics Clyne, Elisabeth Alley, Richard B. Vore, Margot Gräff, Dominik Anandakrishnan, Sridhar Walter, Fabian Thomas Sergeant, Amandine Glacial hydraulic tremor on Rhonegletscher, Switzerland |
topic_facet |
Glacier hydrology mountain glaciers seismicity seismics |
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. ISSN:0022-1430 ISSN:1727-5652 |
format |
Article in Journal/Newspaper |
author |
Clyne, Elisabeth Alley, Richard B. Vore, Margot Gräff, Dominik Anandakrishnan, Sridhar Walter, Fabian Thomas Sergeant, Amandine |
author_facet |
Clyne, Elisabeth Alley, Richard B. Vore, Margot Gräff, Dominik Anandakrishnan, Sridhar Walter, Fabian Thomas Sergeant, Amandine |
author_sort |
Clyne, Elisabeth |
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 |
International Glaciological Society |
publishDate |
2023 |
url |
https://hdl.handle.net/20.500.11850/566566 https://doi.org/10.3929/ethz-b-000566566 |
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, 69 (274) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2022.69 info:eu-repo/semantics/altIdentifier/wos/000841626200001 info:eu-repo/grantAgreement/SNF/SNF-Förderungsprofessuren: Fortsetzungsgesuche/183719 info:eu-repo/grantAgreement/ETHZ/ETH Grants/ETH-06 16-2 http://hdl.handle.net/20.500.11850/566566 doi:10.3929/ethz-b-000566566 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
op_doi |
https://doi.org/20.500.11850/56656610.3929/ethz-b-00056656610.1017/jog.2022.69 |
_version_ |
1767963255177740288 |