Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica)
Climate-induced warming of permafrost soils is a global phenomenon, with regional and site-specific variations which are not fully understood. In this context, a 2- D automated electrical resistivity tomography (A-ERT) system was installed for the first time in Antarctica at Deception Island, associ...
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Language: | English |
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Copernicus Publications
2020
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Online Access: | http://hdl.handle.net/10451/43247 https://doi.org/10.5194/tc-14-1105-2020 |
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ftunivlisboa:oai:repositorio.ul.pt:10451/43247 2023-05-15T13:02:46+02:00 Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) Farzamian, Mohammad Vieira, Gonçalo Monteiro Santos, Fernando A. Yaghoobi Tabar, Borhan Hauck, Christian Paz, Maria Catarina Bernardo, Ivo Ramos, Miguel de Pablo, Miguel Angel 2020-04-29T12:02:34Z http://hdl.handle.net/10451/43247 https://doi.org/10.5194/tc-14-1105-2020 eng eng Copernicus Publications www.the-cryosphere.net/14/1105/2020/ 1994-0416 http://hdl.handle.net/10451/43247 doi:10.5194/tc-14-1105-2020 1994-0424 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Permafrost Rock glacier Mountain permafrost article 2020 ftunivlisboa https://doi.org/10.5194/tc-14-1105-2020 2023-02-22T01:11:42Z Climate-induced warming of permafrost soils is a global phenomenon, with regional and site-specific variations which are not fully understood. In this context, a 2- D automated electrical resistivity tomography (A-ERT) system was installed for the first time in Antarctica at Deception Island, associated to the existing Crater Lake site of the Circumpolar Active Layer Monitoring South Program (CALM-S) site. This setup aims to (i) monitor subsurface freezing and thawing processes on a daily and seasonal basis and map the spatial and temporal variability in thaw depth and to (ii) study the impact of short-lived extreme meteorological events on active layer dynamics. In addition, the feasibility of installing and running autonomous ERT monitoring stations in remote and extreme environments such as Antarctica was evaluated for the first time. Measurements were repeated at 4 h intervals during a full year, enabling the detection of seasonal trends and short-lived resistivity changes reflecting individual meteorological events. The latter is important for distinguishing between (1) long-term climatic trends and (2) the impact of anomalous seasons on the ground thermal regime. Our full-year dataset shows large and fast temporal resistivity changes during the seasonal active layer freezing and thawing and indicates that our system setup can resolve spatiotemporal thaw depth variability along the experimental transect at very high temporal resolution. The largest resistivity changes took place during the freezing season in April, when low temperatures induce an abrupt phase change in the active layer in the absence of snow cover. The seasonal thawing of the active layer is associated with a slower resistivity decrease during October due to the presence of snow cover and the corresponding zero-curtain effect. Detailed investigation of the daily resistivity variations reveals several periods with rapid and sharp resistivity changes of the near-surface layers due to the brief surficial refreezing of the active layer in ... Article in Journal/Newspaper Active layer monitoring Antarc* Antarctica Deception Island permafrost Universidade de Lisboa: repositório.UL Crater Lake ENVELOPE(-60.667,-60.667,-62.983,-62.983) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Glacier Mountain ENVELOPE(-131.854,-131.854,56.783,56.783) The Cryosphere 14 3 1105 1120 |
institution |
Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Permafrost Rock glacier Mountain permafrost |
spellingShingle |
Permafrost Rock glacier Mountain permafrost Farzamian, Mohammad Vieira, Gonçalo Monteiro Santos, Fernando A. Yaghoobi Tabar, Borhan Hauck, Christian Paz, Maria Catarina Bernardo, Ivo Ramos, Miguel de Pablo, Miguel Angel Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
topic_facet |
Permafrost Rock glacier Mountain permafrost |
description |
Climate-induced warming of permafrost soils is a global phenomenon, with regional and site-specific variations which are not fully understood. In this context, a 2- D automated electrical resistivity tomography (A-ERT) system was installed for the first time in Antarctica at Deception Island, associated to the existing Crater Lake site of the Circumpolar Active Layer Monitoring South Program (CALM-S) site. This setup aims to (i) monitor subsurface freezing and thawing processes on a daily and seasonal basis and map the spatial and temporal variability in thaw depth and to (ii) study the impact of short-lived extreme meteorological events on active layer dynamics. In addition, the feasibility of installing and running autonomous ERT monitoring stations in remote and extreme environments such as Antarctica was evaluated for the first time. Measurements were repeated at 4 h intervals during a full year, enabling the detection of seasonal trends and short-lived resistivity changes reflecting individual meteorological events. The latter is important for distinguishing between (1) long-term climatic trends and (2) the impact of anomalous seasons on the ground thermal regime. Our full-year dataset shows large and fast temporal resistivity changes during the seasonal active layer freezing and thawing and indicates that our system setup can resolve spatiotemporal thaw depth variability along the experimental transect at very high temporal resolution. The largest resistivity changes took place during the freezing season in April, when low temperatures induce an abrupt phase change in the active layer in the absence of snow cover. The seasonal thawing of the active layer is associated with a slower resistivity decrease during October due to the presence of snow cover and the corresponding zero-curtain effect. Detailed investigation of the daily resistivity variations reveals several periods with rapid and sharp resistivity changes of the near-surface layers due to the brief surficial refreezing of the active layer in ... |
format |
Article in Journal/Newspaper |
author |
Farzamian, Mohammad Vieira, Gonçalo Monteiro Santos, Fernando A. Yaghoobi Tabar, Borhan Hauck, Christian Paz, Maria Catarina Bernardo, Ivo Ramos, Miguel de Pablo, Miguel Angel |
author_facet |
Farzamian, Mohammad Vieira, Gonçalo Monteiro Santos, Fernando A. Yaghoobi Tabar, Borhan Hauck, Christian Paz, Maria Catarina Bernardo, Ivo Ramos, Miguel de Pablo, Miguel Angel |
author_sort |
Farzamian, Mohammad |
title |
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
title_short |
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
title_full |
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
title_fullStr |
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
title_full_unstemmed |
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica) |
title_sort |
detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (deception island, antarctica) |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
http://hdl.handle.net/10451/43247 https://doi.org/10.5194/tc-14-1105-2020 |
long_lat |
ENVELOPE(-60.667,-60.667,-62.983,-62.983) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-131.854,-131.854,56.783,56.783) |
geographic |
Crater Lake Deception Island Glacier Mountain |
geographic_facet |
Crater Lake Deception Island Glacier Mountain |
genre |
Active layer monitoring Antarc* Antarctica Deception Island permafrost |
genre_facet |
Active layer monitoring Antarc* Antarctica Deception Island permafrost |
op_relation |
www.the-cryosphere.net/14/1105/2020/ 1994-0416 http://hdl.handle.net/10451/43247 doi:10.5194/tc-14-1105-2020 1994-0424 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-14-1105-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
3 |
container_start_page |
1105 |
op_container_end_page |
1120 |
_version_ |
1766320640584843264 |