气候变化领域集成服务门户(CCPortal): Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica

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DOI	10.5194/tc-14-2217-2020
	Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica
	Lindzey L.E.; Beem L.H.; Young D.A.; Quartini E.; Blankenship D.D.; Lee C.-K.; Sang Lee W.; Ik Lee J.; Lee J.
发表日期	2020
ISSN	19940416
起始页码	2217
结束页码	2233
卷号	14 期号:7
英文摘要	In the 2016 2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of characterizing the subglacial water distribution that supports a system of active subglacial lakes and informing the site selection for a potential subglacial access drilling project. This survey overlaps with and expands upon an earlier survey of the Drygalski Ice Tongue and the David Glacier grounding zone from 2011 and 2012 to create a 5 km resolution survey extending 200 km upstream from the grounding zone. The surveyed region covers two active subglacial lakes and includes reflights of ICESat ground tracks that extend the surface elevation record in the region. This is one of the most extensive aerogeophysical surveys of an active lake system and provides higher-resolution boundary conditions and basal characterizations that will enable process studies of these features. This paper introduces a new helicopter-mounted ice-penetrating radar and laser altimetry system, notes a discrepancy between the original surfaceelevation- derived lake outlines and locations of possible water collection based on basal geometry and hydraulic potential, and presents radar-based observations of basal conditions that are inconsistent with large collections of ponded water despite laser altimetry showing that the hypothesized active lakes are at a highstand. © 2020 EDP Sciences. All rights reserved.
英文关键词	altimeter; altimetry; boundary condition; catchment; geophysical method; glacier; ICESat; subglacial environment; Antarctica
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/202147
作者单位	University of Texas Institute for Geophysics, University of Texas at Austin, Austin, TX, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Montana State University, Bozeman, Montana, United States; Unit of Ice Sheet and Sea Level Changes, Korea Polar Research Institute, Incheon, 21990, South Korea; Division of Polar Earth-System Sciences, Korea Polar Research Institute, Incheon, 21990, South Korea; Division of Polar Technology, Korea Polar Research Institute, Incheon, 21990, South Korea; Department of Ocean Engineering, University of Washington Applied Physics Laboratory, Seattle, WA, United States
推荐引用方式 GB/T 7714	Lindzey L.E.,Beem L.H.,Young D.A.,et al. Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica[J],2020,14(7).
APA	Lindzey L.E..,Beem L.H..,Young D.A..,Quartini E..,Blankenship D.D..,...&Lee J..(2020).Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica.Cryosphere,14(7).
MLA	Lindzey L.E.,et al."Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica".Cryosphere 14.7(2020).