Seismic Monitoring of Permafrost in Svalbard, Arctic Norway
Dans le cadre de l’intégration aux dispositions européens EPOS, Résif s'est transformé en octobre 2023 en Epos-France, une nouvelle infrastructure de recherche aux contours thématiques plus larges et en accord avec ceux de sa grande sœur européenne. International audience Abstract We analyze da...
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Online Access: | https://hal.science/hal-03286889 https://doi.org/10.1785/0220200470 |
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ftunifranchecom:oai:HAL:hal-03286889v1 2024-05-19T07:27:30+00:00 Seismic Monitoring of Permafrost in Svalbard, Arctic Norway Albaric, Julie Kühn, Daniela Ohrnberger, Matthias Langet, Nadège Harris, Dave Polom, Ulrich Lecomte, Isabelle Hillers, Gregor Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Norwegian Seismic Array (NORSAR) Institut für Geowissenschaften University of Potsdam = Universität Potsdam Deschutes Signal Processing LLC, Maupin, Oregon Leibniz Institute for Applied Physics Leibniz Association University of Bergen (UiB) Helsingin yliopisto = Helsingfors universitet = University of Helsinki 2021-07-07 https://hal.science/hal-03286889 https://doi.org/10.1785/0220200470 en eng HAL CCSD Seismological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1785/0220200470 hal-03286889 https://hal.science/hal-03286889 doi:10.1785/0220200470 ISSN: 0895-0695 Seismological Research Letters https://hal.science/hal-03286889 Seismological Research Letters, 2021, ⟨10.1785/0220200470⟩ RESIF Epos-France [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2021 ftunifranchecom https://doi.org/10.1785/0220200470 2024-05-01T23:53:27Z Dans le cadre de l’intégration aux dispositions européens EPOS, Résif s'est transformé en octobre 2023 en Epos-France, une nouvelle infrastructure de recherche aux contours thématiques plus larges et en accord avec ceux de sa grande sœur européenne. International audience Abstract We analyze data from passive and active seismic experiments conducted in the Adventdalen valley of Svalbard in the Norwegian Arctic. Our objective is to characterize the ambient wavefield of the region and to investigate permafrost dynamics through estimates of seismic velocity variations. We are motivated by a need for early geophysical detection of potentially hazardous changes to permafrost stability. We draw upon several data sources to constrain various aspects of seismic wave propagation in Adventdalen. We use f-k analysis of five years of continuous data from the Spitsbergen seismic array (SPITS) to demonstrate that ambient seismic noise on Svalbard consists of continuously present body waves and intermittent surface waves appearing at regular intervals. A change in wavefield direction accompanies the sudden onset of surface waves when the average temperature rises above the freezing point, suggesting a cryogenic origin. This hypothesis is supported further by our analysis of records from a temporary broadband network, which indicates that the background wavefield is dominated by icequakes. Synthetic Green’s functions calculated from a 3D velocity model match well with empirical Green’s functions constructed from the recorded ambient seismic noise. We use a shallow shear-wave velocity model, obtained from active seismic measurements, to estimate the maximum depth of Rayleigh wave sensitivity to changes in shear velocity to be in the 50–100 m range. We extract seasonal variations in seismic velocities from ambient noise cross-correlation functions computed over three years of SPITS data. We attribute relative velocity variations to changes in the ice content of the shallow (2–4 m depth) permafrost, which is sensitive to ... Article in Journal/Newspaper Adventdalen Arctic Ice permafrost Svalbard Spitsbergen Université de Franche-Comté (UFC): HAL Seismological Research Letters 92 5 2891 2904 |
institution |
Open Polar |
collection |
Université de Franche-Comté (UFC): HAL |
op_collection_id |
ftunifranchecom |
language |
English |
topic |
RESIF Epos-France [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
RESIF Epos-France [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Albaric, Julie Kühn, Daniela Ohrnberger, Matthias Langet, Nadège Harris, Dave Polom, Ulrich Lecomte, Isabelle Hillers, Gregor Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
topic_facet |
RESIF Epos-France [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
Dans le cadre de l’intégration aux dispositions européens EPOS, Résif s'est transformé en octobre 2023 en Epos-France, une nouvelle infrastructure de recherche aux contours thématiques plus larges et en accord avec ceux de sa grande sœur européenne. International audience Abstract We analyze data from passive and active seismic experiments conducted in the Adventdalen valley of Svalbard in the Norwegian Arctic. Our objective is to characterize the ambient wavefield of the region and to investigate permafrost dynamics through estimates of seismic velocity variations. We are motivated by a need for early geophysical detection of potentially hazardous changes to permafrost stability. We draw upon several data sources to constrain various aspects of seismic wave propagation in Adventdalen. We use f-k analysis of five years of continuous data from the Spitsbergen seismic array (SPITS) to demonstrate that ambient seismic noise on Svalbard consists of continuously present body waves and intermittent surface waves appearing at regular intervals. A change in wavefield direction accompanies the sudden onset of surface waves when the average temperature rises above the freezing point, suggesting a cryogenic origin. This hypothesis is supported further by our analysis of records from a temporary broadband network, which indicates that the background wavefield is dominated by icequakes. Synthetic Green’s functions calculated from a 3D velocity model match well with empirical Green’s functions constructed from the recorded ambient seismic noise. We use a shallow shear-wave velocity model, obtained from active seismic measurements, to estimate the maximum depth of Rayleigh wave sensitivity to changes in shear velocity to be in the 50–100 m range. We extract seasonal variations in seismic velocities from ambient noise cross-correlation functions computed over three years of SPITS data. We attribute relative velocity variations to changes in the ice content of the shallow (2–4 m depth) permafrost, which is sensitive to ... |
author2 |
Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Norwegian Seismic Array (NORSAR) Institut für Geowissenschaften University of Potsdam = Universität Potsdam Deschutes Signal Processing LLC, Maupin, Oregon Leibniz Institute for Applied Physics Leibniz Association University of Bergen (UiB) Helsingin yliopisto = Helsingfors universitet = University of Helsinki |
format |
Article in Journal/Newspaper |
author |
Albaric, Julie Kühn, Daniela Ohrnberger, Matthias Langet, Nadège Harris, Dave Polom, Ulrich Lecomte, Isabelle Hillers, Gregor |
author_facet |
Albaric, Julie Kühn, Daniela Ohrnberger, Matthias Langet, Nadège Harris, Dave Polom, Ulrich Lecomte, Isabelle Hillers, Gregor |
author_sort |
Albaric, Julie |
title |
Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
title_short |
Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
title_full |
Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
title_fullStr |
Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
title_full_unstemmed |
Seismic Monitoring of Permafrost in Svalbard, Arctic Norway |
title_sort |
seismic monitoring of permafrost in svalbard, arctic norway |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03286889 https://doi.org/10.1785/0220200470 |
genre |
Adventdalen Arctic Ice permafrost Svalbard Spitsbergen |
genre_facet |
Adventdalen Arctic Ice permafrost Svalbard Spitsbergen |
op_source |
ISSN: 0895-0695 Seismological Research Letters https://hal.science/hal-03286889 Seismological Research Letters, 2021, ⟨10.1785/0220200470⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1785/0220200470 hal-03286889 https://hal.science/hal-03286889 doi:10.1785/0220200470 |
op_doi |
https://doi.org/10.1785/0220200470 |
container_title |
Seismological Research Letters |
container_volume |
92 |
container_issue |
5 |
container_start_page |
2891 |
op_container_end_page |
2904 |
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1799477939629195264 |