Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea)
Submarine permafrost degradation rates may be determined by a number of interacting processes, including rates of sea level rise and coastal erosion, sea bottom temperature and salinity regimes, geothermal heat flux and heat and mass diffusion within the sediment column. Observations of ice-bearing...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35970 https://doi.org/10.1029/2011JF002088 |
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:35970 2023-05-15T15:39:41+02:00 Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) Overduin, Pier Paul Westermann, Sebastian Yoshikawa, Kenji Haberlau, Thomas Romanovsky, Vladimir E. Wetterich, Sebastian 2012 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35970 https://doi.org/10.1029/2011JF002088 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35970 https://doi.org/10.1029/2011JF002088 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2012 ftubpotsdam https://doi.org/10.1029/2011JF002088 2022-07-28T20:45:56Z Submarine permafrost degradation rates may be determined by a number of interacting processes, including rates of sea level rise and coastal erosion, sea bottom temperature and salinity regimes, geothermal heat flux and heat and mass diffusion within the sediment column. Observations of ice-bearing permafrost in shelf sediments are necessary in order to determine its spatial distribution and to quantify its degradation rate. We tested the use of direct current electrical resistivity to ice-bearing permafrost in Elson Lagoon northeast of Barrow, Alaska (Beaufort Sea). A sharp increase in electrical resistivity was observed in profiles collected perpendicular to and along the coastline and is interpreted to be the boundary between ice-free sediment and underlying ice-bearing submarine permafrost. The depth to the interpreted ice-bearing permafrost increases from <2 m below sea level to over 12 m below sea level with increasing distance from the coastline. The dependence of the saline sediment electrical resistivity on temperature and freezing was measured in the laboratory to provide validation for the field measurements. Electrical resistivity was shown to be effective for detection of shallow ice-bearing permafrost in the coastal zone. Historical coastal retreat rates were combined with the inclination of the top of the ice-bearing permafrost to calculate mean vertical permafrost degradation rates of 1 to 4 cm yr(-1). Article in Journal/Newspaper Barrow Beaufort Sea Ice permafrost Alaska University of Potsdam: publish.UP Journal of Geophysical Research: Earth Surface 117 F2 n/a n/a |
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University of Potsdam: publish.UP |
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ftubpotsdam |
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English |
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Institut für Geowissenschaften |
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Institut für Geowissenschaften Overduin, Pier Paul Westermann, Sebastian Yoshikawa, Kenji Haberlau, Thomas Romanovsky, Vladimir E. Wetterich, Sebastian Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
topic_facet |
Institut für Geowissenschaften |
description |
Submarine permafrost degradation rates may be determined by a number of interacting processes, including rates of sea level rise and coastal erosion, sea bottom temperature and salinity regimes, geothermal heat flux and heat and mass diffusion within the sediment column. Observations of ice-bearing permafrost in shelf sediments are necessary in order to determine its spatial distribution and to quantify its degradation rate. We tested the use of direct current electrical resistivity to ice-bearing permafrost in Elson Lagoon northeast of Barrow, Alaska (Beaufort Sea). A sharp increase in electrical resistivity was observed in profiles collected perpendicular to and along the coastline and is interpreted to be the boundary between ice-free sediment and underlying ice-bearing submarine permafrost. The depth to the interpreted ice-bearing permafrost increases from <2 m below sea level to over 12 m below sea level with increasing distance from the coastline. The dependence of the saline sediment electrical resistivity on temperature and freezing was measured in the laboratory to provide validation for the field measurements. Electrical resistivity was shown to be effective for detection of shallow ice-bearing permafrost in the coastal zone. Historical coastal retreat rates were combined with the inclination of the top of the ice-bearing permafrost to calculate mean vertical permafrost degradation rates of 1 to 4 cm yr(-1). |
format |
Article in Journal/Newspaper |
author |
Overduin, Pier Paul Westermann, Sebastian Yoshikawa, Kenji Haberlau, Thomas Romanovsky, Vladimir E. Wetterich, Sebastian |
author_facet |
Overduin, Pier Paul Westermann, Sebastian Yoshikawa, Kenji Haberlau, Thomas Romanovsky, Vladimir E. Wetterich, Sebastian |
author_sort |
Overduin, Pier Paul |
title |
Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
title_short |
Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
title_full |
Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
title_fullStr |
Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
title_full_unstemmed |
Geoelectric observations of the degradation of nearshore submarine permafrost at Barrow (Alaskan Beaufort Sea) |
title_sort |
geoelectric observations of the degradation of nearshore submarine permafrost at barrow (alaskan beaufort sea) |
publishDate |
2012 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35970 https://doi.org/10.1029/2011JF002088 |
genre |
Barrow Beaufort Sea Ice permafrost Alaska |
genre_facet |
Barrow Beaufort Sea Ice permafrost Alaska |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/35970 https://doi.org/10.1029/2011JF002088 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2011JF002088 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
117 |
container_issue |
F2 |
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n/a |
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_version_ |
1766371720976924672 |