气候变化领域集成服务门户(CCPortal): Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey

CCPortal

DOI	10.5194/tc-15-3577-2021
	Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey
	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.
发表日期	2021
ISSN	19940416
起始页码	3577
结束页码	3593
卷号	15 期号:8
英文摘要	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. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202391
作者单位	Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, United States; Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States; Department of Geoscience, Aarhus University, Aarhus, Denmark; Center for Limnology, University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Microbiology, University of Tennessee, Knoxville, TN 37996, United States; Department of Environmental Studies, Dartmouth College, Hanover, NH 03755, United States
推荐引用方式 GB/T 7714	Myers K.F.,Doran P.T.,Tulaczyk S.M.,et al. Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey[J],2021,15(8).
APA	Myers K.F..,Doran P.T..,Tulaczyk S.M..,Foley N.T..,Bording T.S..,...&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).
MLA	Myers K.F.,et al."Thermal legacy of a large paleolake in Taylor Valley, East Antarctica, as evidenced by an airborne electromagnetic survey".Cryosphere 15.8(2021).