Articles | Volume 15, issue 8
https://doi.org/10.5194/tc-15-3577-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-3577-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Aug 2021
Research article |
| 03 Aug 2021
| 03 Aug 2021
Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey
Krista F. Myers
CORRESPONDING AUTHOR
Department of Geology and Geophysics, Louisiana State University,
Baton Rouge, LA 70803, USA
Peter T. Doran
Department of Geology and Geophysics, Louisiana State University,
Baton Rouge, LA 70803, USA
Slawek M. Tulaczyk
Department of Earth and Planetary Sciences, University of California
Santa Cruz, Santa Cruz, CA 95064, USA
Neil T. Foley
Department of Earth and Planetary Sciences, University of California
Santa Cruz, Santa Cruz, CA 95064, USA
Thue S. Bording
Department of Geoscience, Aarhus University, Aarhus, Denmark
Esben Auken
Department of Geoscience, Aarhus University, Aarhus, Denmark
Hilary A. Dugan
Center for Limnology, University of Wisconsin-Madison, Madison, WI
53706, USA
Jill A. Mikucki
Department of Microbiology, University of Tennessee, Knoxville,
Knoxville, TN 37996, USA
Nikolaj Foged
Department of Geoscience, Aarhus University, Aarhus, Denmark
Denys Grombacher
Department of Geoscience, Aarhus University, Aarhus, Denmark
Ross A. Virginia
Department of Environmental Studies, Dartmouth College, Hanover, NH
03755, USA
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Related subject area
Discipline: Frozen ground | Subject: Antarctic
Employing automated electrical resistivity tomography for detecting short- and long-term changes in permafrost and active-layer dynamics in the maritime Antarctic
Detailed detection of active layer freeze–thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica)
Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale
Mohammad Farzamian, Teddi Herring, Gonçalo Vieira, Miguel Angel de Pablo, Borhan Yaghoobi Tabar, and Christian Hauck
The Cryosphere, 18, 4197–4213, https://doi.org/10.5194/tc-18-4197-2024, https://doi.org/10.5194/tc-18-4197-2024, 2024
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An automated electrical resistivity tomography (A-ERT) system was developed and deployed in Antarctica to monitor permafrost and active-layer dynamics. The A-ERT, coupled with an efficient processing workflow, demonstrated its capability to monitor real-time thaw depth progression, detect seasonal and surficial freezing–thawing events, and assess permafrost stability. Our study showcased the potential of A-ERT to contribute to global permafrost monitoring networks.
Mohammad Farzamian, Gonçalo Vieira, Fernando A. Monteiro Santos, Borhan Yaghoobi Tabar, Christian Hauck, Maria Catarina Paz, Ivo Bernardo, Miguel Ramos, and Miguel Angel de Pablo
The Cryosphere, 14, 1105–1120, https://doi.org/10.5194/tc-14-1105-2020, https://doi.org/10.5194/tc-14-1105-2020, 2020
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A 2-D automated electrical resistivity tomography (A-ERT) system was installed for the first time in Antarctica at Deception Island to (i) monitor subsurface freezing and thawing processes on a daily and seasonal basis and map the spatial and temporal variability of thaw depth and to (ii) study the impact of short-lived extreme meteorological events on active layer dynamics.
Jaroslav Obu, Sebastian Westermann, Gonçalo Vieira, Andrey Abramov, Megan Ruby Balks, Annett Bartsch, Filip Hrbáček, Andreas Kääb, and Miguel Ramos
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Little is known about permafrost in the Antarctic outside of the few research stations. We used a simple equilibrium permafrost model to estimate permafrost temperatures in the whole Antarctic. The lowest permafrost temperature on Earth is −36 °C in the Queen Elizabeth Range in the Transantarctic Mountains. Temperatures are commonly between −23 and −18 °C in mountainous areas rising above the Antarctic Ice Sheet, between −14 and −8 °C in coastal areas, and up to 0 °C on the Antarctic Peninsula.
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Short summary
Lake Fryxell, Antarctica, has undergone hundreds of meters of change in recent geologic history. However, there is disagreement on when lake levels were higher and by how much. This study uses resistivity data to map the subsurface conditions (frozen versus unfrozen ground) to map ancient shorelines. Our models indicate that Lake Fryxell was up to 60 m higher just 1500 to 4000 years ago. This amount of lake level change shows how sensitive these systems are to small changes in temperature.
Lake Fryxell, Antarctica, has undergone hundreds of meters of change in recent geologic history....
