Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic
Repeated electrical resistivity tomography (ERT) surveys can substantially advance the understanding of spatial and temporal freeze-thaw dynamics in remote regions, such as Antarctica, where the evolution of permafrost has been poorly investigated. To enable the time-lapse ERT surveys in Antarctica,...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2024
|
Subjects: | |
Online Access: | https://doi.org/10.5194/egusphere-2023-2908 https://noa.gwlb.de/receive/cop_mods_00070917 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069242/egusphere-2023-2908.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2908/egusphere-2023-2908.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070917 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070917 2024-02-11T09:54:40+01:00 Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic Farzamian, Mohammad Herring, Teddi Vieira, Goncalo de Pablo, Miguel Angel Yaghoobi Tabar, Borhan Hauck, Christian 2024-01 electronic https://doi.org/10.5194/egusphere-2023-2908 https://noa.gwlb.de/receive/cop_mods_00070917 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069242/egusphere-2023-2908.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2908/egusphere-2023-2908.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2908 https://noa.gwlb.de/receive/cop_mods_00070917 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069242/egusphere-2023-2908.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2908/egusphere-2023-2908.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2908 2024-01-15T00:22:45Z Repeated electrical resistivity tomography (ERT) surveys can substantially advance the understanding of spatial and temporal freeze-thaw dynamics in remote regions, such as Antarctica, where the evolution of permafrost has been poorly investigated. To enable the time-lapse ERT surveys in Antarctica, however, an automated ERT (A-ERT) system is required, as regular site visits are not feasible. In this context, we developed a robust A-ERT prototype and installed it in the Crater Lake CALM-S site at Deception Island, Antarctica to collect quasi-continuous ERT measurements. To efficiently process a large number of obtained A-ERT datasets, we developed an automated data processing workflow to efficiently filter and invert the A-ERT datasets and extract the key information required for a detailed investigation of permafrost and active layer dynamics. In this paper, we report on the results of two complete year-round A-ERT datasets collected in 2010 and 2019 at Crater Lake CALM-S site and compare them with available climate and borehole data. The A-ERT profile has a length of 9.5 m with an electrode spacing of 0.5 m, enabling a maximum investigation depth of approximately 2 m. Our detailed investigation of the A-ERT data and inverted modeling results shows that the A-ERT system can detect the active-layer freezing and thawing events with very high temporal resolution. The resistivity of the permafrost zone in 2019 is very similar to the values found in 2010, suggesting the stability of the permafrost over almost one decade at this site. The evolution of thaw depth exhibits also a similar pattern in both years, with the active layer thickness fluctuating between 0.20–0.35 m. However, a slight thinning of the active layer is evident in early 2019, compared to the equivalent period in 2010. These findings show that A-ERT, combined with the new processing workflow that we developed, is an efficient tool for studying permafrost and active layer dynamics with very high resolution and minimal environmental disturbance. The ... Article in Journal/Newspaper Active layer thickness Antarc* Antarctic Antarctica Deception Island permafrost Niedersächsisches Online-Archiv NOA Antarctic Crater Lake ENVELOPE(-60.667,-60.667,-62.983,-62.983) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Farzamian, Mohammad Herring, Teddi Vieira, Goncalo de Pablo, Miguel Angel Yaghoobi Tabar, Borhan Hauck, Christian Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
topic_facet |
article Verlagsveröffentlichung |
description |
Repeated electrical resistivity tomography (ERT) surveys can substantially advance the understanding of spatial and temporal freeze-thaw dynamics in remote regions, such as Antarctica, where the evolution of permafrost has been poorly investigated. To enable the time-lapse ERT surveys in Antarctica, however, an automated ERT (A-ERT) system is required, as regular site visits are not feasible. In this context, we developed a robust A-ERT prototype and installed it in the Crater Lake CALM-S site at Deception Island, Antarctica to collect quasi-continuous ERT measurements. To efficiently process a large number of obtained A-ERT datasets, we developed an automated data processing workflow to efficiently filter and invert the A-ERT datasets and extract the key information required for a detailed investigation of permafrost and active layer dynamics. In this paper, we report on the results of two complete year-round A-ERT datasets collected in 2010 and 2019 at Crater Lake CALM-S site and compare them with available climate and borehole data. The A-ERT profile has a length of 9.5 m with an electrode spacing of 0.5 m, enabling a maximum investigation depth of approximately 2 m. Our detailed investigation of the A-ERT data and inverted modeling results shows that the A-ERT system can detect the active-layer freezing and thawing events with very high temporal resolution. The resistivity of the permafrost zone in 2019 is very similar to the values found in 2010, suggesting the stability of the permafrost over almost one decade at this site. The evolution of thaw depth exhibits also a similar pattern in both years, with the active layer thickness fluctuating between 0.20–0.35 m. However, a slight thinning of the active layer is evident in early 2019, compared to the equivalent period in 2010. These findings show that A-ERT, combined with the new processing workflow that we developed, is an efficient tool for studying permafrost and active layer dynamics with very high resolution and minimal environmental disturbance. The ... |
format |
Article in Journal/Newspaper |
author |
Farzamian, Mohammad Herring, Teddi Vieira, Goncalo de Pablo, Miguel Angel Yaghoobi Tabar, Borhan Hauck, Christian |
author_facet |
Farzamian, Mohammad Herring, Teddi Vieira, Goncalo de Pablo, Miguel Angel Yaghoobi Tabar, Borhan Hauck, Christian |
author_sort |
Farzamian, Mohammad |
title |
Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
title_short |
Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
title_full |
Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
title_fullStr |
Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
title_full_unstemmed |
Employing Automated Electrical Resistivity Tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the Maritime Antarctic |
title_sort |
employing automated electrical resistivity tomography for detecting short- and long-term changes in permafrost and active layer dynamics in the maritime antarctic |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2908 https://noa.gwlb.de/receive/cop_mods_00070917 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069242/egusphere-2023-2908.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2908/egusphere-2023-2908.pdf |
long_lat |
ENVELOPE(-60.667,-60.667,-62.983,-62.983) ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Antarctic Crater Lake Deception Island |
geographic_facet |
Antarctic Crater Lake Deception Island |
genre |
Active layer thickness Antarc* Antarctic Antarctica Deception Island permafrost |
genre_facet |
Active layer thickness Antarc* Antarctic Antarctica Deception Island permafrost |
op_relation |
https://doi.org/10.5194/egusphere-2023-2908 https://noa.gwlb.de/receive/cop_mods_00070917 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069242/egusphere-2023-2908.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2908/egusphere-2023-2908.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2908 |
_version_ |
1790598262693036032 |