Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream
We present distributed fiber‐optic sensing data from an airplane landing near the EastGRIP ice core drilling site on the Northeast Greenland Ice Stream. The recordings of exceptional clarity contain at least 15 easily visible wave propagation modes corresponding to various Rayleigh, pseudoacoustic,...
Published in: | The Seismic Record |
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Format: | Article in Journal/Newspaper |
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HAL CCSD
2023
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Online Access: | https://hal.science/hal-04357095 https://hal.science/hal-04357095/document https://hal.science/hal-04357095/file/islandora_168595.pdf https://doi.org/10.1785/0320230004 |
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ftinsu:oai:HAL:hal-04357095v1 2024-04-14T08:12:23+00:00 Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream Fichtner, Andreas Hofstede, Coen Kennett, Brian L. N. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Alfred Wegener Institute for Polar and Marine Research (AWI) Australian National University (ANU) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2023 https://hal.science/hal-04357095 https://hal.science/hal-04357095/document https://hal.science/hal-04357095/file/islandora_168595.pdf https://doi.org/10.1785/0320230004 en eng HAL CCSD Seismological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1785/0320230004 hal-04357095 https://hal.science/hal-04357095 https://hal.science/hal-04357095/document https://hal.science/hal-04357095/file/islandora_168595.pdf doi:10.1785/0320230004 info:eu-repo/semantics/OpenAccess ISSN: 2694-4006 The Seismic Record https://hal.science/hal-04357095 The Seismic Record, 2023, 3 (2), pp.125-133. ⟨10.1785/0320230004⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1785/0320230004 2024-03-21T17:02:59Z We present distributed fiber‐optic sensing data from an airplane landing near the EastGRIP ice core drilling site on the Northeast Greenland Ice Stream. The recordings of exceptional clarity contain at least 15 easily visible wave propagation modes corresponding to various Rayleigh, pseudoacoustic, and leaky waves. In the frequency range from 8 to 55 Hz, seven of the modes can be identified unambiguously. Based on an a priori firn and ice model that matches P‐wave dispersion and the fundamental Rayleigh mode, a Backus–Gilbert inversion yields an S‐wavespeed model with resolution lengths as low as a few meters and uncertainties in the range of only 10 m/s. An empirical scaling from S wavespeed to density leads to a depth estimate of the firn–ice transition between 65 and 71 m, in agreement with direct firn core measurements. This work underlines the potential of distributed fiber‐optic sensing combined with strong unconventional seismic sources in studies of firn and ice properties, which are critical ingredients of ice core climatology, as well as ice sheet dynamics and mass balance calculations. Article in Journal/Newspaper Greenland ice core Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Greenland The Seismic Record 3 2 125 133 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Fichtner, Andreas Hofstede, Coen Kennett, Brian L. N. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
We present distributed fiber‐optic sensing data from an airplane landing near the EastGRIP ice core drilling site on the Northeast Greenland Ice Stream. The recordings of exceptional clarity contain at least 15 easily visible wave propagation modes corresponding to various Rayleigh, pseudoacoustic, and leaky waves. In the frequency range from 8 to 55 Hz, seven of the modes can be identified unambiguously. Based on an a priori firn and ice model that matches P‐wave dispersion and the fundamental Rayleigh mode, a Backus–Gilbert inversion yields an S‐wavespeed model with resolution lengths as low as a few meters and uncertainties in the range of only 10 m/s. An empirical scaling from S wavespeed to density leads to a depth estimate of the firn–ice transition between 65 and 71 m, in agreement with direct firn core measurements. This work underlines the potential of distributed fiber‐optic sensing combined with strong unconventional seismic sources in studies of firn and ice properties, which are critical ingredients of ice core climatology, as well as ice sheet dynamics and mass balance calculations. |
author2 |
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Alfred Wegener Institute for Polar and Marine Research (AWI) Australian National University (ANU) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Fichtner, Andreas Hofstede, Coen Kennett, Brian L. N. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf |
author_facet |
Fichtner, Andreas Hofstede, Coen Kennett, Brian L. N. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf |
author_sort |
Fichtner, Andreas |
title |
Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
title_short |
Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
title_full |
Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
title_fullStr |
Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
title_full_unstemmed |
Fiber-Optic Airplane Seismology on the Northeast Greenland Ice Stream |
title_sort |
fiber-optic airplane seismology on the northeast greenland ice stream |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04357095 https://hal.science/hal-04357095/document https://hal.science/hal-04357095/file/islandora_168595.pdf https://doi.org/10.1785/0320230004 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_source |
ISSN: 2694-4006 The Seismic Record https://hal.science/hal-04357095 The Seismic Record, 2023, 3 (2), pp.125-133. ⟨10.1785/0320230004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1785/0320230004 hal-04357095 https://hal.science/hal-04357095 https://hal.science/hal-04357095/document https://hal.science/hal-04357095/file/islandora_168595.pdf doi:10.1785/0320230004 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1785/0320230004 |
container_title |
The Seismic Record |
container_volume |
3 |
container_issue |
2 |
container_start_page |
125 |
op_container_end_page |
133 |
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1796310181777244160 |