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Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey

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Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey. / Myers, Krista F.; Doran, Peter T.; Tulaczyk, Slawek M.; Foley, Neil T.; Bording, Thue S.; Auken, Esben; Dugan, Hilary A.; Mikucki, Jill A.; Foged, Nikolaj; Grombacher, Denys; Virginia, Ross A.

In: Cryosphere, Vol. 15, No. 8, 08.2021, p. 3577-3593.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

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Myers, K. F., Doran, P. T., Tulaczyk, S. M., Foley, N. T., Bording, T. S., Auken, E., Dugan, H. A., Mikucki, J. A., Foged, N., Grombacher, D., & Virginia, R. A. (2021). Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey. Cryosphere, 15(8), 3577-3593. https://doi.org/10.5194/tc-15-3577-2021

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Author

Myers, Krista F. ; Doran, Peter T. ; Tulaczyk, Slawek M. ; Foley, Neil T. ; Bording, Thue S. ; Auken, Esben ; Dugan, Hilary A. ; Mikucki, Jill A. ; Foged, Nikolaj ; Grombacher, Denys ; Virginia, Ross A. / Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey. In: Cryosphere. 2021 ; Vol. 15, No. 8. pp. 3577-3593.

Bibtex

@article{47a8f61201fe4c6f99ac427f5ac802a7,
title = "Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey",
abstract = "Previous studies of the lakes of the McMurdo Dry Valleys have attempted to constrain lake level history, and results suggest the lakes have undergone hundreds of meters of lake level change within the last 20ĝ€¯000 years. Past studies have utilized the interpretation of geologic deposits, lake chemistry, and ice sheet history to deduce lake level history; however a substantial amount of disagreement remains between the findings, indicating a need for further investigation using new techniques. This study utilizes a regional airborne resistivity survey to provide novel insight into the paleohydrology of the region. Mean resistivity maps revealed an extensive brine beneath the Lake Fryxell basin, which is interpreted as a legacy groundwater signal from higher lake levels in the past. Resistivity data suggest that active permafrost formation has been ongoing since the onset of lake drainage and that as recently as 1500-4000 years BP, lake levels were over 60ĝ€¯m higher than present. This coincides with a warmer-Than-modern paleoclimate throughout the Holocene inferred by the nearby Taylor Dome ice core record. Our results indicate Mid to Late Holocene lake level high stands, which runs counter to previous research finding a colder and drier era with little hydrologic activity throughout the last 5000 years.",
author = "Myers, {Krista F.} and Doran, {Peter T.} and Tulaczyk, {Slawek M.} and Foley, {Neil T.} and Bording, {Thue S.} and Esben Auken and Dugan, {Hilary A.} and Mikucki, {Jill A.} and Nikolaj Foged and Denys Grombacher and Virginia, {Ross A.}",
note = "Publisher Copyright: {\textcopyright} 2021 Copernicus GmbH. All rights reserved.",
year = "2021",
month = aug,
doi = "10.5194/tc-15-3577-2021",
language = "English",
volume = "15",
pages = "3577--3593",
journal = "Cryosphere",
issn = "1994-0416",
publisher = "Copernicus GmbH",
number = "8",

}

RIS

TY - JOUR

T1 - Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey

AU - Myers, Krista F.

AU - Doran, Peter T.

AU - Tulaczyk, Slawek M.

AU - Foley, Neil T.

AU - Bording, Thue S.

AU - Auken, Esben

AU - Dugan, Hilary A.

AU - Mikucki, Jill A.

AU - Foged, Nikolaj

AU - Grombacher, Denys

AU - Virginia, Ross A.

N1 - Publisher Copyright: © 2021 Copernicus GmbH. All rights reserved.

PY - 2021/8

Y1 - 2021/8

N2 - Previous studies of the lakes of the McMurdo Dry Valleys have attempted to constrain lake level history, and results suggest the lakes have undergone hundreds of meters of lake level change within the last 20ĝ€¯000 years. Past studies have utilized the interpretation of geologic deposits, lake chemistry, and ice sheet history to deduce lake level history; however a substantial amount of disagreement remains between the findings, indicating a need for further investigation using new techniques. This study utilizes a regional airborne resistivity survey to provide novel insight into the paleohydrology of the region. Mean resistivity maps revealed an extensive brine beneath the Lake Fryxell basin, which is interpreted as a legacy groundwater signal from higher lake levels in the past. Resistivity data suggest that active permafrost formation has been ongoing since the onset of lake drainage and that as recently as 1500-4000 years BP, lake levels were over 60ĝ€¯m higher than present. This coincides with a warmer-Than-modern paleoclimate throughout the Holocene inferred by the nearby Taylor Dome ice core record. Our results indicate Mid to Late Holocene lake level high stands, which runs counter to previous research finding a colder and drier era with little hydrologic activity throughout the last 5000 years.

AB - Previous studies of the lakes of the McMurdo Dry Valleys have attempted to constrain lake level history, and results suggest the lakes have undergone hundreds of meters of lake level change within the last 20ĝ€¯000 years. Past studies have utilized the interpretation of geologic deposits, lake chemistry, and ice sheet history to deduce lake level history; however a substantial amount of disagreement remains between the findings, indicating a need for further investigation using new techniques. This study utilizes a regional airborne resistivity survey to provide novel insight into the paleohydrology of the region. Mean resistivity maps revealed an extensive brine beneath the Lake Fryxell basin, which is interpreted as a legacy groundwater signal from higher lake levels in the past. Resistivity data suggest that active permafrost formation has been ongoing since the onset of lake drainage and that as recently as 1500-4000 years BP, lake levels were over 60ĝ€¯m higher than present. This coincides with a warmer-Than-modern paleoclimate throughout the Holocene inferred by the nearby Taylor Dome ice core record. Our results indicate Mid to Late Holocene lake level high stands, which runs counter to previous research finding a colder and drier era with little hydrologic activity throughout the last 5000 years.

UR - http://www.scopus.com/inward/record.url?scp=85112083395&partnerID=8YFLogxK

U2 - 10.5194/tc-15-3577-2021

DO - 10.5194/tc-15-3577-2021

M3 - Journal article

AN - SCOPUS:85112083395

VL - 15

SP - 3577

EP - 3593

JO - Cryosphere

JF - Cryosphere

SN - 1994-0416

IS - 8

ER -