Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water
ABSTRACT Seismic surveying of the coastal areas in the Arctic is best facilitated during wintertime when the sea ice is land‐fast. This eases the logistics of the operation and assures that there is no damage made to the vulnerable tundra. Seismic experiments on floating ice on shallow water perform...
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crwiley:10.1002/nsg.12082 2024-09-15T18:35:28+00:00 Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water Johansen, Tor Arne Ruud, Bent Ole Norges Forskningsråd 2020 http://dx.doi.org/10.1002/nsg.12082 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fnsg.12082 https://onlinelibrary.wiley.com/doi/pdf/10.1002/nsg.12082 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/nsg.12082 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Near Surface Geophysics volume 18, issue 1, page 49-59 ISSN 1569-4445 1873-0604 journal-article 2020 crwiley https://doi.org/10.1002/nsg.12082 2024-07-30T04:19:19Z ABSTRACT Seismic surveying of the coastal areas in the Arctic is best facilitated during wintertime when the sea ice is land‐fast. This eases the logistics of the operation and assures that there is no damage made to the vulnerable tundra. Seismic experiments on floating ice on shallow water performed in a fjord in Svalbard in the Norwegian Arctic show prominent Scholte waves. The dispersion relation of Scholte waves can provide the shear wave velocities of the seabed sediments. Scholte wave data can potentially be obtained when the seismic source and geophone receivers are both placed on top of the floating ice. However, the Scholte wave data become more distinct by using an air gun lowered some metres below the ice. A rock physics model based on a two‐step differential effective medium scheme has been tuned to predict seismic properties found for very loose sediments, among these very high P‐wave to S‐wave velocity ratios. The rock physics model enables us to convert seismic velocities obtained from Scholte wave data to quantitative estimates of the sediment composition. Article in Journal/Newspaper Sea ice Svalbard Tundra Wiley Online Library Near Surface Geophysics 18 1 49 59 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Seismic surveying of the coastal areas in the Arctic is best facilitated during wintertime when the sea ice is land‐fast. This eases the logistics of the operation and assures that there is no damage made to the vulnerable tundra. Seismic experiments on floating ice on shallow water performed in a fjord in Svalbard in the Norwegian Arctic show prominent Scholte waves. The dispersion relation of Scholte waves can provide the shear wave velocities of the seabed sediments. Scholte wave data can potentially be obtained when the seismic source and geophone receivers are both placed on top of the floating ice. However, the Scholte wave data become more distinct by using an air gun lowered some metres below the ice. A rock physics model based on a two‐step differential effective medium scheme has been tuned to predict seismic properties found for very loose sediments, among these very high P‐wave to S‐wave velocity ratios. The rock physics model enables us to convert seismic velocities obtained from Scholte wave data to quantitative estimates of the sediment composition. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Johansen, Tor Arne Ruud, Bent Ole |
spellingShingle |
Johansen, Tor Arne Ruud, Bent Ole Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
author_facet |
Johansen, Tor Arne Ruud, Bent Ole |
author_sort |
Johansen, Tor Arne |
title |
Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
title_short |
Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
title_full |
Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
title_fullStr |
Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
title_full_unstemmed |
Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water |
title_sort |
characterization of seabed properties from scholte waves acquired on floating ice on shallow water |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/nsg.12082 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fnsg.12082 https://onlinelibrary.wiley.com/doi/pdf/10.1002/nsg.12082 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/nsg.12082 |
genre |
Sea ice Svalbard Tundra |
genre_facet |
Sea ice Svalbard Tundra |
op_source |
Near Surface Geophysics volume 18, issue 1, page 49-59 ISSN 1569-4445 1873-0604 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1002/nsg.12082 |
container_title |
Near Surface Geophysics |
container_volume |
18 |
container_issue |
1 |
container_start_page |
49 |
op_container_end_page |
59 |
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1810478655873220608 |