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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American Geophysical Union
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ftawi:oai:epic.awi.de:39389 2024-09-15T18:11:28+00:00 Submarine permafrost depth from ambient seismic noise Overduin, P. Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, M. N. Ohrnberger, Matthias 2015-09-16 application/pdf https://epic.awi.de/id/eprint/39389/ https://epic.awi.de/id/eprint/39389/1/Overduin_et_al-2015-Geophysical_Research_Letters.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015GL065409/full https://hdl.handle.net/10013/epic.46567 https://hdl.handle.net/10013/epic.46567.d001 unknown American Geophysical Union https://epic.awi.de/id/eprint/39389/1/Overduin_et_al-2015-Geophysical_Research_Letters.pdf https://hdl.handle.net/10013/epic.46567.d001 Overduin, P. P. orcid:0000-0001-9849-4712 , Haberland, C. , Ryberg, T. , Kneier, F. , Jacobi, T. , Grigoriev, M. N. and Ohrnberger, M. (2015) Submarine permafrost depth from ambient seismic noise , Geophysical research Letters, 42 (18), pp. 7581-7588 . doi:10.1002/2015GL065409 <https://doi.org/10.1002/2015GL065409> , hdl:10013/epic.46567 EPIC3Geophysical research Letters, American Geophysical Union, 42(18), pp. 7581-7588 Article isiRev 2015 ftawi https://doi.org/10.1002/2015GL065409 2024-06-24T04:13:16Z 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 20.7 m ± 15%, 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 Ice laptev Laptev Sea permafrost Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 42 18 7581 7588 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 20.7 m ± 15%, 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, P. Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, M. N. Ohrnberger, Matthias |
spellingShingle |
Overduin, P. Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, M. N. Ohrnberger, Matthias Submarine permafrost depth from ambient seismic noise |
author_facet |
Overduin, P. Paul Haberland, Christian Ryberg, Trond Kneier, Fabian Jacobi, Tim Grigoriev, M. N. Ohrnberger, Matthias |
author_sort |
Overduin, P. 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 |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/39389/ https://epic.awi.de/id/eprint/39389/1/Overduin_et_al-2015-Geophysical_Research_Letters.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015GL065409/full https://hdl.handle.net/10013/epic.46567 https://hdl.handle.net/10013/epic.46567.d001 |
genre |
Ice laptev Laptev Sea permafrost Siberia |
genre_facet |
Ice laptev Laptev Sea permafrost Siberia |
op_source |
EPIC3Geophysical research Letters, American Geophysical Union, 42(18), pp. 7581-7588 |
op_relation |
https://epic.awi.de/id/eprint/39389/1/Overduin_et_al-2015-Geophysical_Research_Letters.pdf https://hdl.handle.net/10013/epic.46567.d001 Overduin, P. P. orcid:0000-0001-9849-4712 , Haberland, C. , Ryberg, T. , Kneier, F. , Jacobi, T. , Grigoriev, M. N. and Ohrnberger, M. (2015) Submarine permafrost depth from ambient seismic noise , Geophysical research Letters, 42 (18), pp. 7581-7588 . doi:10.1002/2015GL065409 <https://doi.org/10.1002/2015GL065409> , hdl:10013/epic.46567 |
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 |
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1810449069317816320 |