Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions
Teleseismic P-wave receiver functions (PRFs) in ice-covered regions are contaminated by reverberations within the ice-sheet. The crustal conversion events which are commonly used for identifying lithospheric structure are concealed by these ice reverberations. The problematic ice-phase reverberation...
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ftzenodo:oai:zenodo.org:6586203 2024-09-15T17:48:25+00:00 Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions Dale Harpley Steve Hearn Shaun Strong 2021-09-15 https://doi.org/10.5281/zenodo.6586203 eng eng Zenodo https://zenodo.org/communities/aseg_extended_abstracts_2021 https://doi.org/10.5281/zenodo.6586202 https://doi.org/10.5281/zenodo.6586203 oai:zenodo.org:6586203 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Australian Society of Exploration Geophysicists Extended Abstracts, Volume 2021, 3rd Australasian Exploration Geoscience Conference, Brisbane, 2021, (2021-09-15) AEGC, Australasian Exploration Geoscience Conference, Brisbane, Australia, 15-17 September 2021 receiver function ice-sheet reverberations Wiener filtering predictive deconvolution info:eu-repo/semantics/conferencePaper 2021 ftzenodo https://doi.org/10.5281/zenodo.658620310.5281/zenodo.6586202 2024-07-26T19:16:07Z Teleseismic P-wave receiver functions (PRFs) in ice-covered regions are contaminated by reverberations within the ice-sheet. The crustal conversion events which are commonly used for identifying lithospheric structure are concealed by these ice reverberations. The problematic ice-phase reverberations can, however, be exploited. We describe a practical process, incorporating a simple generalised linear inversion (GLI) stage, which yields an ice-sheet model. The derived ice model can then be used to design a Wiener filter aimed at attenuating ice phases, and revealing crustal phases in the PRF. Although it is theoretically approximate, the Wiener approach appears robust. Synthetic trialling, using realistic models, is essential for understanding the limitations of the algorithm. The full process has been applied at ice-covered stations in Antarctica and Greenland. In each case, we have derived robust models for the ice, and have successfully extracted crustal Ps phases from the contaminated receiver functions. Open-Access Online Publication: March 03, 2023 Conference Object Antarc* Antarctica Greenland Ice Sheet Zenodo |
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language |
English |
topic |
receiver function ice-sheet reverberations Wiener filtering predictive deconvolution |
spellingShingle |
receiver function ice-sheet reverberations Wiener filtering predictive deconvolution Dale Harpley Steve Hearn Shaun Strong Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
topic_facet |
receiver function ice-sheet reverberations Wiener filtering predictive deconvolution |
description |
Teleseismic P-wave receiver functions (PRFs) in ice-covered regions are contaminated by reverberations within the ice-sheet. The crustal conversion events which are commonly used for identifying lithospheric structure are concealed by these ice reverberations. The problematic ice-phase reverberations can, however, be exploited. We describe a practical process, incorporating a simple generalised linear inversion (GLI) stage, which yields an ice-sheet model. The derived ice model can then be used to design a Wiener filter aimed at attenuating ice phases, and revealing crustal phases in the PRF. Although it is theoretically approximate, the Wiener approach appears robust. Synthetic trialling, using realistic models, is essential for understanding the limitations of the algorithm. The full process has been applied at ice-covered stations in Antarctica and Greenland. In each case, we have derived robust models for the ice, and have successfully extracted crustal Ps phases from the contaminated receiver functions. Open-Access Online Publication: March 03, 2023 |
format |
Conference Object |
author |
Dale Harpley Steve Hearn Shaun Strong |
author_facet |
Dale Harpley Steve Hearn Shaun Strong |
author_sort |
Dale Harpley |
title |
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
title_short |
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
title_full |
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
title_fullStr |
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
title_full_unstemmed |
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions |
title_sort |
attenuation of ice-sheet reverberations in teleseismic p-wave receiver functions |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5281/zenodo.6586203 |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_source |
Australian Society of Exploration Geophysicists Extended Abstracts, Volume 2021, 3rd Australasian Exploration Geoscience Conference, Brisbane, 2021, (2021-09-15) AEGC, Australasian Exploration Geoscience Conference, Brisbane, Australia, 15-17 September 2021 |
op_relation |
https://zenodo.org/communities/aseg_extended_abstracts_2021 https://doi.org/10.5281/zenodo.6586202 https://doi.org/10.5281/zenodo.6586203 oai:zenodo.org:6586203 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.658620310.5281/zenodo.6586202 |
_version_ |
1810289599691358208 |