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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Madeline E. Myers, Peter T. Doran, and Krista F. Myers
The Cryosphere Discuss., https://doi.org/10.5194/tc-2020-203, https://doi.org/10.5194/tc-2020-203, 2020
Revised manuscript not accepted
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In polar regions like the Dry Valleys of Antarctica, snowfall is expected to increase. Small amounts of snow lower radiation for melting and photosynthesis by increasing the albedo of the surrounding dark soil. Two decades of snowfall data have shown that the volume of snowfall has been declining since 2009, which contradicts the anticipated increase; however, the number of days with snow has been increasing, which will slow glacial melt and lower productivity below the snow cover.
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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....
