248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling
The Aurora Basin in Wilkes Land, East Antarctica, is a critical sector in estimations of future sea level contributions from the continental ice sheet. The region is mostly grounded below sea-level and drains through the most rapidly thinning glacier in East Antarctica, the Totten Glacier, with evid...
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ftunivtasecite:oai:ecite.utas.edu.au:143912 2023-05-15T13:59:46+02:00 248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling Kelly, I Reading, AM Staal, T Walters, SJ Turner, RJ 2020 application/pdf https://agu.confex.com/agu/fm20/meetingapp.cgi/Paper/671552 http://ecite.utas.edu.au/143912 en eng American Geophysical Union http://ecite.utas.edu.au/143912/1/143912-Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling.pdf Kelly, I and Reading, AM and Staal, T and Walters, SJ and Turner, RJ, 248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling, American Geophysical Union (AGU) Fall Meeting, 1-17 December 2020, Online (2020) [Conference Extract] http://ecite.utas.edu.au/143912 Earth Sciences Geophysics Seismology and seismic exploration Conference Extract NonPeerReviewed 2020 ftunivtasecite 2021-06-21T22:16:28Z The Aurora Basin in Wilkes Land, East Antarctica, is a critical sector in estimations of future sea level contributions from the continental ice sheet. The region is mostly grounded below sea-level and drains through the most rapidly thinning glacier in East Antarctica, the Totten Glacier, with evidence for potential deep sub-shelf intrusions of modified Circumpolar Deep Water and future retreat highly sensitive to the bedrock topography close to the present grounding line. Whilst remote sensing techniques have extensively chartered the region, the nature of the subglacial ice bedrock interface, which acts as a key control on ice sheet dynamics and evolution, remains poorly understood. Seismological techniques have proven their capability to interpret sub-surface structures underneath the ice sheet, and passive methods utilising teleseismic signals and ambient noise afford the possibility for remote site coverage at a sufficient spatial resolution without the requirement of active sources. This research aims to map comprehensively the basal environment of key areas within the Aurora Basin, with particular focus on the sedimentary distribution and thermal state at the ice bedrock transition zone, in order to identify subglacial localities capable of promoting rapid ice sheet degradation and inform future seismic instrumentation deployment within the sector. We review the current state of geophysical knowledge regarding the Aurora Basin through the compilation and analysis of existing observational data, alongside the application of newly developed computational techniques in seismic waveform modelling to infer subglacial characteristics that could be indicative of future ice sheet collapse. Other factors influencing the basal system such as subglacial hydrology and coupled ice-ocean interactions will also be considered as we steadily improve our understanding of the ice sheet - bedrock interface across the region. Conference Object Antarc* Antarctica East Antarctica Ice Sheet Totten Glacier Wilkes Land eCite UTAS (University of Tasmania) East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geophysics Seismology and seismic exploration |
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Earth Sciences Geophysics Seismology and seismic exploration Kelly, I Reading, AM Staal, T Walters, SJ Turner, RJ 248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
topic_facet |
Earth Sciences Geophysics Seismology and seismic exploration |
description |
The Aurora Basin in Wilkes Land, East Antarctica, is a critical sector in estimations of future sea level contributions from the continental ice sheet. The region is mostly grounded below sea-level and drains through the most rapidly thinning glacier in East Antarctica, the Totten Glacier, with evidence for potential deep sub-shelf intrusions of modified Circumpolar Deep Water and future retreat highly sensitive to the bedrock topography close to the present grounding line. Whilst remote sensing techniques have extensively chartered the region, the nature of the subglacial ice bedrock interface, which acts as a key control on ice sheet dynamics and evolution, remains poorly understood. Seismological techniques have proven their capability to interpret sub-surface structures underneath the ice sheet, and passive methods utilising teleseismic signals and ambient noise afford the possibility for remote site coverage at a sufficient spatial resolution without the requirement of active sources. This research aims to map comprehensively the basal environment of key areas within the Aurora Basin, with particular focus on the sedimentary distribution and thermal state at the ice bedrock transition zone, in order to identify subglacial localities capable of promoting rapid ice sheet degradation and inform future seismic instrumentation deployment within the sector. We review the current state of geophysical knowledge regarding the Aurora Basin through the compilation and analysis of existing observational data, alongside the application of newly developed computational techniques in seismic waveform modelling to infer subglacial characteristics that could be indicative of future ice sheet collapse. Other factors influencing the basal system such as subglacial hydrology and coupled ice-ocean interactions will also be considered as we steadily improve our understanding of the ice sheet - bedrock interface across the region. |
format |
Conference Object |
author |
Kelly, I Reading, AM Staal, T Walters, SJ Turner, RJ |
author_facet |
Kelly, I Reading, AM Staal, T Walters, SJ Turner, RJ |
author_sort |
Kelly, I |
title |
248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
title_short |
248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
title_full |
248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
title_fullStr |
248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
title_full_unstemmed |
248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling |
title_sort |
248 - subglacial character of the aurora basin, east antarctica, from novel seismic waveform modelling |
publisher |
American Geophysical Union |
publishDate |
2020 |
url |
https://agu.confex.com/agu/fm20/meetingapp.cgi/Paper/671552 http://ecite.utas.edu.au/143912 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
East Antarctica Wilkes Land Totten Glacier |
geographic_facet |
East Antarctica Wilkes Land Totten Glacier |
genre |
Antarc* Antarctica East Antarctica Ice Sheet Totten Glacier Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet Totten Glacier Wilkes Land |
op_relation |
http://ecite.utas.edu.au/143912/1/143912-Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling.pdf Kelly, I and Reading, AM and Staal, T and Walters, SJ and Turner, RJ, 248 - Subglacial character of the Aurora Basin, East Antarctica, from novel seismic waveform modelling, American Geophysical Union (AGU) Fall Meeting, 1-17 December 2020, Online (2020) [Conference Extract] http://ecite.utas.edu.au/143912 |
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1766268559962406912 |