Icequake Source Mechanisms for Studying Glacial Sliding ...
Improving our understanding of glacial sliding is crucial for constraining basal drag in ice dynamics models. We use icequakes, sudden releases of seismic energy as the ice slides over the bed, to provide geophysical observations that can be used to aid understanding of the physics of glacial slidin...
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ftdatacite:10.17863/cam.59180 2024-02-04T09:56:03+01:00 Icequake Source Mechanisms for Studying Glacial Sliding ... Hudson, TS Brisbourne, AM Walter, F Gräff, D White, RS Smith, AM 2020 https://dx.doi.org/10.17863/cam.59180 https://www.repository.cam.ac.uk/handle/1810/312085 en eng American Geophysical Union (AGU) open.access All rights reserved http://purl.org/coar/access_right/c_abf2 seismology glaciology cryoseismology icequakes ice dynamics sea level rise Article ScholarlyArticle JournalArticle article-journal 2020 ftdatacite https://doi.org/10.17863/cam.59180 2024-01-05T14:24:00Z Improving our understanding of glacial sliding is crucial for constraining basal drag in ice dynamics models. We use icequakes, sudden releases of seismic energy as the ice slides over the bed, to provide geophysical observations that can be used to aid understanding of the physics of glacial sliding and constrain ice dynamics models. These icequakes are located at the bed of an alpine glacier in Switzerland and the Rutford Ice Stream, West Antarctica, two extremes of glacial settings and spatial scales. We investigate a number of possible icequake source mechanisms by performing full waveform inversions to constrain the fundamental physics and stress release during an icequake stick‐slip event. Results show that double‐couple mechanisms best describe the source for the events from both glacial settings and the icequakes originate at or very near the ice‐bed interface. We also present an exploratory method for attempting to measure the till shear modulus, if indirect reflected icequake radiation is observed. ... Article in Journal/Newspaper Antarc* Antarctica Rutford Ice Stream West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) West Antarctica |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
seismology glaciology cryoseismology icequakes ice dynamics sea level rise |
spellingShingle |
seismology glaciology cryoseismology icequakes ice dynamics sea level rise Hudson, TS Brisbourne, AM Walter, F Gräff, D White, RS Smith, AM Icequake Source Mechanisms for Studying Glacial Sliding ... |
topic_facet |
seismology glaciology cryoseismology icequakes ice dynamics sea level rise |
description |
Improving our understanding of glacial sliding is crucial for constraining basal drag in ice dynamics models. We use icequakes, sudden releases of seismic energy as the ice slides over the bed, to provide geophysical observations that can be used to aid understanding of the physics of glacial sliding and constrain ice dynamics models. These icequakes are located at the bed of an alpine glacier in Switzerland and the Rutford Ice Stream, West Antarctica, two extremes of glacial settings and spatial scales. We investigate a number of possible icequake source mechanisms by performing full waveform inversions to constrain the fundamental physics and stress release during an icequake stick‐slip event. Results show that double‐couple mechanisms best describe the source for the events from both glacial settings and the icequakes originate at or very near the ice‐bed interface. We also present an exploratory method for attempting to measure the till shear modulus, if indirect reflected icequake radiation is observed. ... |
format |
Article in Journal/Newspaper |
author |
Hudson, TS Brisbourne, AM Walter, F Gräff, D White, RS Smith, AM |
author_facet |
Hudson, TS Brisbourne, AM Walter, F Gräff, D White, RS Smith, AM |
author_sort |
Hudson, TS |
title |
Icequake Source Mechanisms for Studying Glacial Sliding ... |
title_short |
Icequake Source Mechanisms for Studying Glacial Sliding ... |
title_full |
Icequake Source Mechanisms for Studying Glacial Sliding ... |
title_fullStr |
Icequake Source Mechanisms for Studying Glacial Sliding ... |
title_full_unstemmed |
Icequake Source Mechanisms for Studying Glacial Sliding ... |
title_sort |
icequake source mechanisms for studying glacial sliding ... |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://dx.doi.org/10.17863/cam.59180 https://www.repository.cam.ac.uk/handle/1810/312085 |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Rutford Rutford Ice Stream West Antarctica |
geographic_facet |
Rutford Rutford Ice Stream West Antarctica |
genre |
Antarc* Antarctica Rutford Ice Stream West Antarctica |
genre_facet |
Antarc* Antarctica Rutford Ice Stream West Antarctica |
op_rights |
open.access All rights reserved http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.17863/cam.59180 |
_version_ |
1789960403121340416 |