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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Online Access: | https://dx.doi.org/10.5281/zenodo.6586202 https://zenodo.org/record/6586202 |
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ftdatacite:10.5281/zenodo.6586202 2023-05-15T14:13:46+02:00 Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions ... Harpley, Dale Hearn, Steve Strong, Shaun 2021 https://dx.doi.org/10.5281/zenodo.6586202 https://zenodo.org/record/6586202 en eng Zenodo https://zenodo.org/communities/aseg_extended_abstracts_2021 https://dx.doi.org/10.5281/zenodo.6586203 https://zenodo.org/communities/aseg_extended_abstracts_2021 Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess receiver function ice-sheet reverberations Wiener filtering predictive deconvolution Article ConferencePaper 2021 ftdatacite https://doi.org/10.5281/zenodo.658620210.5281/zenodo.6586203 2023-04-03T13:08:57Z 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 ... Article in Journal/Newspaper Antarc* Antarctica Greenland Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
receiver function ice-sheet reverberations Wiener filtering predictive deconvolution |
spellingShingle |
receiver function ice-sheet reverberations Wiener filtering predictive deconvolution Harpley, Dale Hearn, Steve Strong, Shaun 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 |
Article in Journal/Newspaper |
author |
Harpley, Dale Hearn, Steve Strong, Shaun |
author_facet |
Harpley, Dale Hearn, Steve Strong, Shaun |
author_sort |
Harpley, Dale |
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://dx.doi.org/10.5281/zenodo.6586202 https://zenodo.org/record/6586202 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_relation |
https://zenodo.org/communities/aseg_extended_abstracts_2021 https://dx.doi.org/10.5281/zenodo.6586203 https://zenodo.org/communities/aseg_extended_abstracts_2021 |
op_rights |
Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.658620210.5281/zenodo.6586203 |
_version_ |
1766286282077503488 |