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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Language: | English |
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2023
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Online Access: | https://curis.ku.dk/portal/da/publications/fiberoptic-airplane-seismology-on-the-northeast-greenland-ice-stream(8a3e5150-15c0-4aef-b963-b242806c4170).html https://doi.org/10.1785/0320230004 https://curis.ku.dk/ws/files/366635107/tsr_2023004.1.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/8a3e5150-15c0-4aef-b963-b242806c4170 2024-06-09T07:46:22+00:00 Fiber‐Optic Airplane Seismology on the Northeast Greenland Ice Stream Fichtner, Andreas Hofstede, Coen N. Kennett, Brian L. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf 2023-05-16 application/pdf https://curis.ku.dk/portal/da/publications/fiberoptic-airplane-seismology-on-the-northeast-greenland-ice-stream(8a3e5150-15c0-4aef-b963-b242806c4170).html https://doi.org/10.1785/0320230004 https://curis.ku.dk/ws/files/366635107/tsr_2023004.1.pdf eng eng info:eu-repo/semantics/openAccess Fichtner , A , Hofstede , C , N. Kennett , B L , Nymand , N F , Lauritzen , M L , Zigone , D & Eisen , O 2023 , ' Fiber‐Optic Airplane Seismology on the Northeast Greenland Ice Stream ' , The Seismic Record , vol. 3 , no. 2 , pp. 125-133 . https://doi.org/10.1785/0320230004 article 2023 ftcopenhagenunip https://doi.org/10.1785/0320230004 2024-05-16T11:29:30Z 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 University of Copenhagen: Research Greenland The Seismic Record 3 2 125 133 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Fichtner, Andreas Hofstede, Coen N. Kennett, Brian L. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf |
spellingShingle |
Fichtner, Andreas Hofstede, Coen N. Kennett, Brian L. Nymand, Niels F. Lauritzen, Mikkel L. Zigone, Dimitri Eisen, Olaf Fiber‐Optic Airplane Seismology on the Northeast Greenland Ice Stream |
author_facet |
Fichtner, Andreas Hofstede, Coen N. Kennett, Brian L. 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 |
publishDate |
2023 |
url |
https://curis.ku.dk/portal/da/publications/fiberoptic-airplane-seismology-on-the-northeast-greenland-ice-stream(8a3e5150-15c0-4aef-b963-b242806c4170).html https://doi.org/10.1785/0320230004 https://curis.ku.dk/ws/files/366635107/tsr_2023004.1.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_source |
Fichtner , A , Hofstede , C , N. Kennett , B L , Nymand , N F , Lauritzen , M L , Zigone , D & Eisen , O 2023 , ' Fiber‐Optic Airplane Seismology on the Northeast Greenland Ice Stream ' , The Seismic Record , vol. 3 , no. 2 , pp. 125-133 . https://doi.org/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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1801376191372853248 |