Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ...
Ice streams are major contributors to ice sheet mass loss and sea level rise. Effects of their dynamic behaviour are imprinted into seismic properties, such as wave speeds and anisotropy. Here, we present results from a distributed acoustic sensing (DAS) experiment in a deep ice-core borehole in the...
Main Authors: | , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
ETH Zurich
2023
|
Subjects: | |
Online Access: | https://dx.doi.org/10.3929/ethz-b-000641514 http://hdl.handle.net/20.500.11850/641514 |
id |
ftdatacite:10.3929/ethz-b-000641514 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.3929/ethz-b-000641514 2024-09-15T18:09:20+00:00 Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... Fichtner, Andreas Hofstede, Coen Gebraad, Lars Zunino, Andrea Zigone, Dimitri Eisen, Olaf 2023 application/pdf https://dx.doi.org/10.3929/ethz-b-000641514 http://hdl.handle.net/20.500.11850/641514 en eng ETH Zurich Glaciology Arctic region Tomography Seismic anisotropy Text Journal Article ScholarlyArticle article-journal 2023 ftdatacite https://doi.org/10.3929/ethz-b-000641514 2024-09-02T07:54:09Z Ice streams are major contributors to ice sheet mass loss and sea level rise. Effects of their dynamic behaviour are imprinted into seismic properties, such as wave speeds and anisotropy. Here, we present results from a distributed acoustic sensing (DAS) experiment in a deep ice-core borehole in the onset region of the Northeast Greenland Ice Stream, with focus on phenomenological and methodological aspects. A series of active seismic surface sources produced clear recordings of the P and S wavefield, including internal reflections, along a 1500 m long fibre-optic cable that was placed into the borehole. The combination of nonlinear traveltime tomography with a firn model constrained by multimode surface wave data, allows us to invert for P and S wave speeds with depth-dependent uncertainties on the order of only 10 m s-1, and vertical resolution of 20-70 m. The wave speed model in conjunction with the regularly spaced DAS data enable a straightforward separation of internal upward reflections followed by a ... : Geophysical Journal International, 235 (3) ... Text Greenland ice core Ice Sheet DataCite |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Glaciology Arctic region Tomography Seismic anisotropy |
spellingShingle |
Glaciology Arctic region Tomography Seismic anisotropy Fichtner, Andreas Hofstede, Coen Gebraad, Lars Zunino, Andrea Zigone, Dimitri Eisen, Olaf Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
topic_facet |
Glaciology Arctic region Tomography Seismic anisotropy |
description |
Ice streams are major contributors to ice sheet mass loss and sea level rise. Effects of their dynamic behaviour are imprinted into seismic properties, such as wave speeds and anisotropy. Here, we present results from a distributed acoustic sensing (DAS) experiment in a deep ice-core borehole in the onset region of the Northeast Greenland Ice Stream, with focus on phenomenological and methodological aspects. A series of active seismic surface sources produced clear recordings of the P and S wavefield, including internal reflections, along a 1500 m long fibre-optic cable that was placed into the borehole. The combination of nonlinear traveltime tomography with a firn model constrained by multimode surface wave data, allows us to invert for P and S wave speeds with depth-dependent uncertainties on the order of only 10 m s-1, and vertical resolution of 20-70 m. The wave speed model in conjunction with the regularly spaced DAS data enable a straightforward separation of internal upward reflections followed by a ... : Geophysical Journal International, 235 (3) ... |
format |
Text |
author |
Fichtner, Andreas Hofstede, Coen Gebraad, Lars Zunino, Andrea Zigone, Dimitri Eisen, Olaf |
author_facet |
Fichtner, Andreas Hofstede, Coen Gebraad, Lars Zunino, Andrea Zigone, Dimitri Eisen, Olaf |
author_sort |
Fichtner, Andreas |
title |
Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
title_short |
Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
title_full |
Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
title_fullStr |
Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
title_full_unstemmed |
Borehole fibre-optic seismology inside the Northeast Greenland Ice Stream ... |
title_sort |
borehole fibre-optic seismology inside the northeast greenland ice stream ... |
publisher |
ETH Zurich |
publishDate |
2023 |
url |
https://dx.doi.org/10.3929/ethz-b-000641514 http://hdl.handle.net/20.500.11850/641514 |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_doi |
https://doi.org/10.3929/ethz-b-000641514 |
_version_ |
1810446816071647232 |