Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion
Climate change in the Arctic has recently become a major scientific issue, and detailed information on the degradation of subsea permafrost on continental shelves in the Arctic is critical for understanding the major cause and effects of global warming, especially the release of greenhouse gases. Th...
Published in: | Journal of Geophysical Research: Earth Surface |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52216/ https://oceanrep.geomar.de/id/eprint/52216/1/2020JF005941.pdf https://doi.org/10.1029/2020JF005941 |
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ftoceanrep:oai:oceanrep.geomar.de:52216 2024-02-11T09:59:39+01:00 Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion Kang, Seung‐Goo Jin, Young Keun Jang, Ugeun Duchesne, Mathieu J. Shin, Changsoo Kim, Sookwan Riedel, Michael Dallimore, Scott R. Paull, Charles K. Choi, Yeonjin Hong, Jong Kuk 2021-03-11 text https://oceanrep.geomar.de/id/eprint/52216/ https://oceanrep.geomar.de/id/eprint/52216/1/2020JF005941.pdf https://doi.org/10.1029/2020JF005941 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/52216/1/2020JF005941.pdf Kang, S., Jin, Y. K., Jang, U., Duchesne, M. J., Shin, C., Kim, S., Riedel, M. , Dallimore, S. R., Paull, C. K., Choi, Y. and Hong, J. K. (2021) Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion. Open Access Journal of Geophysical Research: Earth Surface, 126 (3). Art.Nr: e2020JF005941. DOI 10.1029/2020JF005941 <https://doi.org/10.1029/2020JF005941>. doi:10.1029/2020JF005941 cc_by_nc_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2020JF005941 2024-01-15T00:23:13Z Climate change in the Arctic has recently become a major scientific issue, and detailed information on the degradation of subsea permafrost on continental shelves in the Arctic is critical for understanding the major cause and effects of global warming, especially the release of greenhouse gases. The subsea permafrost at shallow depths beneath the Arctic continental shelves has significantly higher P‐wave velocities than the surrounding sediments. The distribution of subsea permafrost on Arctic continental shelves has been studied since the 1970s using seismic refraction methods. With seismic refraction data, the seismic velocity and the depth of the upper boundary of subsea permafrost can be determined. However, it is difficult to identify the lower boundary and the internal shape of permafrost. Here, we present two‐dimensional P‐wave velocity models of the continental shelf in the Beaufort Sea by applying the Laplace‐domain full‐waveform inversion method to acquired multichannel seismic reflection data. With the inverted P‐wave velocity model, we identify anomalous high seismic velocities that originated from the subsea permafrost. Information on the two‐dimensional distribution of subsea permafrost on the Arctic continental shelf area, including the upper and lower bounds of subsea permafrost, are presented. Also, the two‐dimensional P‐wave velocity model allows us to estimate the thawing pattern and the shape of subsea permafrost structures. Our proposed P‐wave velocity models were verified by comparison with the previous distribution map of subsea permafrost from seismic refraction analyses, geothermal modeling, and well‐log data. Article in Journal/Newspaper Arctic Arctic Beaufort Sea Climate change Global warming permafrost OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Laplace ENVELOPE(141.467,141.467,-66.782,-66.782) Journal of Geophysical Research: Earth Surface 126 3 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Climate change in the Arctic has recently become a major scientific issue, and detailed information on the degradation of subsea permafrost on continental shelves in the Arctic is critical for understanding the major cause and effects of global warming, especially the release of greenhouse gases. The subsea permafrost at shallow depths beneath the Arctic continental shelves has significantly higher P‐wave velocities than the surrounding sediments. The distribution of subsea permafrost on Arctic continental shelves has been studied since the 1970s using seismic refraction methods. With seismic refraction data, the seismic velocity and the depth of the upper boundary of subsea permafrost can be determined. However, it is difficult to identify the lower boundary and the internal shape of permafrost. Here, we present two‐dimensional P‐wave velocity models of the continental shelf in the Beaufort Sea by applying the Laplace‐domain full‐waveform inversion method to acquired multichannel seismic reflection data. With the inverted P‐wave velocity model, we identify anomalous high seismic velocities that originated from the subsea permafrost. Information on the two‐dimensional distribution of subsea permafrost on the Arctic continental shelf area, including the upper and lower bounds of subsea permafrost, are presented. Also, the two‐dimensional P‐wave velocity model allows us to estimate the thawing pattern and the shape of subsea permafrost structures. Our proposed P‐wave velocity models were verified by comparison with the previous distribution map of subsea permafrost from seismic refraction analyses, geothermal modeling, and well‐log data. |
format |
Article in Journal/Newspaper |
author |
Kang, Seung‐Goo Jin, Young Keun Jang, Ugeun Duchesne, Mathieu J. Shin, Changsoo Kim, Sookwan Riedel, Michael Dallimore, Scott R. Paull, Charles K. Choi, Yeonjin Hong, Jong Kuk |
spellingShingle |
Kang, Seung‐Goo Jin, Young Keun Jang, Ugeun Duchesne, Mathieu J. Shin, Changsoo Kim, Sookwan Riedel, Michael Dallimore, Scott R. Paull, Charles K. Choi, Yeonjin Hong, Jong Kuk Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
author_facet |
Kang, Seung‐Goo Jin, Young Keun Jang, Ugeun Duchesne, Mathieu J. Shin, Changsoo Kim, Sookwan Riedel, Michael Dallimore, Scott R. Paull, Charles K. Choi, Yeonjin Hong, Jong Kuk |
author_sort |
Kang, Seung‐Goo |
title |
Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
title_short |
Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
title_full |
Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
title_fullStr |
Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
title_full_unstemmed |
Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion |
title_sort |
imaging the p‐wave velocity structure of arctic subsea permafrost using laplace‐domain full‐waveform inversion |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52216/ https://oceanrep.geomar.de/id/eprint/52216/1/2020JF005941.pdf https://doi.org/10.1029/2020JF005941 |
long_lat |
ENVELOPE(141.467,141.467,-66.782,-66.782) |
geographic |
Arctic Laplace |
geographic_facet |
Arctic Laplace |
genre |
Arctic Arctic Beaufort Sea Climate change Global warming permafrost |
genre_facet |
Arctic Arctic Beaufort Sea Climate change Global warming permafrost |
op_relation |
https://oceanrep.geomar.de/id/eprint/52216/1/2020JF005941.pdf Kang, S., Jin, Y. K., Jang, U., Duchesne, M. J., Shin, C., Kim, S., Riedel, M. , Dallimore, S. R., Paull, C. K., Choi, Y. and Hong, J. K. (2021) Imaging the P‐Wave Velocity Structure of Arctic Subsea Permafrost Using Laplace‐Domain Full‐Waveform Inversion. Open Access Journal of Geophysical Research: Earth Surface, 126 (3). Art.Nr: e2020JF005941. DOI 10.1029/2020JF005941 <https://doi.org/10.1029/2020JF005941>. doi:10.1029/2020JF005941 |
op_rights |
cc_by_nc_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020JF005941 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
126 |
container_issue |
3 |
_version_ |
1790595452909912064 |