Geophysical identification of permafrost in Livingston Island, maritime Antarctica
The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, includin...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2007
|
Subjects: | |
Online Access: | https://www.zora.uzh.ch/id/eprint/3930/ https://www.zora.uzh.ch/id/eprint/3930/9/Hauck_Blanco_Geophysical_Identification_2007.pdf https://doi.org/10.5167/uzh-3930 https://doi.org/10.1029/2006JF000544 |
id |
ftunivzuerich:oai:www.zora.uzh.ch:3930 |
---|---|
record_format |
openpolar |
spelling |
ftunivzuerich:oai:www.zora.uzh.ch:3930 2024-09-30T14:24:32+00:00 Geophysical identification of permafrost in Livingston Island, maritime Antarctica Hauck, C Blanco, J Gruber, S Vieira, G Ramos, M 2007-06-21 application/pdf https://www.zora.uzh.ch/id/eprint/3930/ https://www.zora.uzh.ch/id/eprint/3930/9/Hauck_Blanco_Geophysical_Identification_2007.pdf https://doi.org/10.5167/uzh-3930 https://doi.org/10.1029/2006JF000544 eng eng American Geophysical Union https://www.zora.uzh.ch/id/eprint/3930/9/Hauck_Blanco_Geophysical_Identification_2007.pdf doi:10.5167/uzh-3930 doi:10.1029/2006JF000544 urn:issn:0148-0227 info:eu-repo/semantics/openAccess Hauck, C; Blanco, J; Gruber, S; Vieira, G; Ramos, M (2007). Geophysical identification of permafrost in Livingston Island, maritime Antarctica. Journal of Geophysical Research, 112:F02S19. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2007 ftunivzuerich https://doi.org/10.5167/uzh-393010.1029/2006JF000544 2024-09-04T00:39:04Z The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, including ice cored moraines and bedrock sites with debris covers of different thickness. Two-dimensional geophysical inversion schemes were used to analyze spatial heterogeneity at field sites and to detect isolated occurrences of ground ice. Results confirm that permafrost is widespread on Livingston Island, with high ice content in ice cored moraines and little in the cracks and fissures of frozen bedrock. Specific electrical resistivity values range from 10,000–40,000 ohm-m (frozen unconsolidated material) to 1500–10,000 ohm-m (frozen quartzite/shale). Combining seismic P wave velocities and specific electrical resistivities, a typical “roof-type” distribution was found with maximum resistivities coinciding with P wave velocities around 3000 m/s and decreasing resistivities for both increasing and decreasing velocities. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal Ice Livingston Island permafrost South Shetland Islands University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Antarctic Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel Hauck, C Blanco, J Gruber, S Vieira, G Ramos, M Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, including ice cored moraines and bedrock sites with debris covers of different thickness. Two-dimensional geophysical inversion schemes were used to analyze spatial heterogeneity at field sites and to detect isolated occurrences of ground ice. Results confirm that permafrost is widespread on Livingston Island, with high ice content in ice cored moraines and little in the cracks and fissures of frozen bedrock. Specific electrical resistivity values range from 10,000–40,000 ohm-m (frozen unconsolidated material) to 1500–10,000 ohm-m (frozen quartzite/shale). Combining seismic P wave velocities and specific electrical resistivities, a typical “roof-type” distribution was found with maximum resistivities coinciding with P wave velocities around 3000 m/s and decreasing resistivities for both increasing and decreasing velocities. |
format |
Article in Journal/Newspaper |
author |
Hauck, C Blanco, J Gruber, S Vieira, G Ramos, M |
author_facet |
Hauck, C Blanco, J Gruber, S Vieira, G Ramos, M |
author_sort |
Hauck, C |
title |
Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
title_short |
Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
title_full |
Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
title_fullStr |
Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
title_full_unstemmed |
Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
title_sort |
geophysical identification of permafrost in livingston island, maritime antarctica |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
https://www.zora.uzh.ch/id/eprint/3930/ https://www.zora.uzh.ch/id/eprint/3930/9/Hauck_Blanco_Geophysical_Identification_2007.pdf https://doi.org/10.5167/uzh-3930 https://doi.org/10.1029/2006JF000544 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Livingston Island South Shetland Islands |
geographic_facet |
Antarctic Livingston Island South Shetland Islands |
genre |
Antarc* Antarctic Antarctica Antarctica Journal Ice Livingston Island permafrost South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal Ice Livingston Island permafrost South Shetland Islands |
op_source |
Hauck, C; Blanco, J; Gruber, S; Vieira, G; Ramos, M (2007). Geophysical identification of permafrost in Livingston Island, maritime Antarctica. Journal of Geophysical Research, 112:F02S19. |
op_relation |
https://www.zora.uzh.ch/id/eprint/3930/9/Hauck_Blanco_Geophysical_Identification_2007.pdf doi:10.5167/uzh-3930 doi:10.1029/2006JF000544 urn:issn:0148-0227 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-393010.1029/2006JF000544 |
_version_ |
1811641425486413824 |