A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn
Abstract The density structure of firn has implications for hydrological and climate modelling and for ice shelf stability. The firn structure can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert inversion (HWI), an approach that considers the slowness of re...
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Online Access: | http://dx.doi.org/10.1017/aog.2023.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000101 |
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crcambridgeupr:10.1017/aog.2023.10 2024-06-09T07:38:33+00:00 A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn Pearce, Emma Booth, Adam D. Rost, Sebastian Sava, Paul Konuk, Tuğrul Brisbourne, Alex Hubbard, Bryn Jones, Ian Natural Environment Research Council 2022 http://dx.doi.org/10.1017/aog.2023.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000101 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 63, issue 87-89, page 44-48 ISSN 0260-3055 1727-5644 journal-article 2022 crcambridgeupr https://doi.org/10.1017/aog.2023.10 2024-05-15T13:09:31Z Abstract The density structure of firn has implications for hydrological and climate modelling and for ice shelf stability. The firn structure can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert inversion (HWI), an approach that considers the slowness of refracted seismic arrivals. However, HWI is appropriate only for steady-state firn profiles and the inversion accuracy can be compromised where firn contains ice layers. In these cases, Full Waveform Inversion (FWI) can be more successful than HWI. FWI extends HWI capabilities by considering the full seismic waveform and incorporates reflected arrivals, thus offering a more accurate estimate of a velocity profile. We show the FWI characterisation of the velocity model has an error of only 1.7% for regions (vs. 4.2% with HWI) with an ice slab (20 m thick, 40 m deep) in an otherwise steady-state firn profile. Article in Journal/Newspaper Annals of Glaciology Ice Shelf Cambridge University Press Annals of Glaciology 1 5 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The density structure of firn has implications for hydrological and climate modelling and for ice shelf stability. The firn structure can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert inversion (HWI), an approach that considers the slowness of refracted seismic arrivals. However, HWI is appropriate only for steady-state firn profiles and the inversion accuracy can be compromised where firn contains ice layers. In these cases, Full Waveform Inversion (FWI) can be more successful than HWI. FWI extends HWI capabilities by considering the full seismic waveform and incorporates reflected arrivals, thus offering a more accurate estimate of a velocity profile. We show the FWI characterisation of the velocity model has an error of only 1.7% for regions (vs. 4.2% with HWI) with an ice slab (20 m thick, 40 m deep) in an otherwise steady-state firn profile. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Pearce, Emma Booth, Adam D. Rost, Sebastian Sava, Paul Konuk, Tuğrul Brisbourne, Alex Hubbard, Bryn Jones, Ian |
spellingShingle |
Pearce, Emma Booth, Adam D. Rost, Sebastian Sava, Paul Konuk, Tuğrul Brisbourne, Alex Hubbard, Bryn Jones, Ian A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
author_facet |
Pearce, Emma Booth, Adam D. Rost, Sebastian Sava, Paul Konuk, Tuğrul Brisbourne, Alex Hubbard, Bryn Jones, Ian |
author_sort |
Pearce, Emma |
title |
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
title_short |
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
title_full |
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
title_fullStr |
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
title_full_unstemmed |
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
title_sort |
synthetic study of acoustic full waveform inversion to improve seismic modelling of firn |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/aog.2023.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000101 |
genre |
Annals of Glaciology Ice Shelf |
genre_facet |
Annals of Glaciology Ice Shelf |
op_source |
Annals of Glaciology volume 63, issue 87-89, page 44-48 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2023.10 |
container_title |
Annals of Glaciology |
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1 |
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5 |
_version_ |
1801373603657154560 |