Submarine permafrost depth from ambient seismic noise
Permafrost inundated since the last glacial maximum is degrading, potentially releasing trapped or stabilized greenhouse gases, but few observations of the depth of ice-bonded permafrost (IBP) below the seafloor exist for most of the arctic continental shelf. We use spectral ratios of the ambient vi...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:38587 2023-05-15T15:02:47+02:00 Submarine permafrost depth from ambient seismic noise Overduin, Pier Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, Mikhail N. Ohrnberger, Matthias 2015 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38587 https://doi.org/10.1002/2015GL065409 eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38587 https://doi.org/10.1002/2015GL065409 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2015 ftubpotsdam https://doi.org/10.1002/2015GL065409 2023-02-12T23:32:15Z Permafrost inundated since the last glacial maximum is degrading, potentially releasing trapped or stabilized greenhouse gases, but few observations of the depth of ice-bonded permafrost (IBP) below the seafloor exist for most of the arctic continental shelf. We use spectral ratios of the ambient vibration seismic wavefield, together with estimated shear wave velocity from the dispersion curves of surface waves, for estimating the thickness of the sediment overlying the IBP. Peaks in spectral ratios modeled for three-layered 1-D systems correspond with varying thickness of the unfrozen sediment. Seismic receivers were deployed on the seabed around Muostakh Island in the central Laptev Sea, Siberia. We derive depths of the IBP between 3.7 and 20.7m15%, increasing with distance from the shoreline. Correspondence between expected permafrost distribution, modeled response, and observational data suggests that the method is promising for the determination of the thickness of unfrozen sediment. Article in Journal/Newspaper Arctic Ice laptev Laptev Sea permafrost Siberia University of Potsdam: publish.UP Arctic Laptev Sea Geophysical Research Letters 42 18 7581 7588 |
institution |
Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
Institut für Geowissenschaften |
spellingShingle |
Institut für Geowissenschaften Overduin, Pier Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, Mikhail N. Ohrnberger, Matthias Submarine permafrost depth from ambient seismic noise |
topic_facet |
Institut für Geowissenschaften |
description |
Permafrost inundated since the last glacial maximum is degrading, potentially releasing trapped or stabilized greenhouse gases, but few observations of the depth of ice-bonded permafrost (IBP) below the seafloor exist for most of the arctic continental shelf. We use spectral ratios of the ambient vibration seismic wavefield, together with estimated shear wave velocity from the dispersion curves of surface waves, for estimating the thickness of the sediment overlying the IBP. Peaks in spectral ratios modeled for three-layered 1-D systems correspond with varying thickness of the unfrozen sediment. Seismic receivers were deployed on the seabed around Muostakh Island in the central Laptev Sea, Siberia. We derive depths of the IBP between 3.7 and 20.7m15%, increasing with distance from the shoreline. Correspondence between expected permafrost distribution, modeled response, and observational data suggests that the method is promising for the determination of the thickness of unfrozen sediment. |
format |
Article in Journal/Newspaper |
author |
Overduin, Pier Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, Mikhail N. Ohrnberger, Matthias |
author_facet |
Overduin, Pier Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, Mikhail N. Ohrnberger, Matthias |
author_sort |
Overduin, Pier Paul |
title |
Submarine permafrost depth from ambient seismic noise |
title_short |
Submarine permafrost depth from ambient seismic noise |
title_full |
Submarine permafrost depth from ambient seismic noise |
title_fullStr |
Submarine permafrost depth from ambient seismic noise |
title_full_unstemmed |
Submarine permafrost depth from ambient seismic noise |
title_sort |
submarine permafrost depth from ambient seismic noise |
publishDate |
2015 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38587 https://doi.org/10.1002/2015GL065409 |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic Ice laptev Laptev Sea permafrost Siberia |
genre_facet |
Arctic Ice laptev Laptev Sea permafrost Siberia |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38587 https://doi.org/10.1002/2015GL065409 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/2015GL065409 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
18 |
container_start_page |
7581 |
op_container_end_page |
7588 |
_version_ |
1766334716770779136 |