气候变化领域集成服务门户(CCPortal): Hydrologic Properties of a Highly Permeable Firn Aquifer in the Wilkins Ice Shelf; Antarctica

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DOI	10.1029/2020GL089552
	Hydrologic Properties of a Highly Permeable Firn Aquifer in the Wilkins Ice Shelf; Antarctica
	Montgomery L.; Miège C.; Miller J.; Scambos T.A.; Wallin B.; Miller O.; Solomon D.K.; Forster R.; Koenig L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	We present measurements of the density, hydraulic conductivity, and specific discharge of a widespread firn aquifer in Antarctica, within the Wilkins Ice Shelf. At the field site, the aquifer is 16.2 m thick, starting at 13.4 m from the snow surface and transitioning from water-saturated firn to ice at 29.6 m. Hydraulic conductivity derived from slug tests show a geometric mean value of 1.4 ± 1.2 × 10−4 m s−1, equivalent to permeability of 2.6 ± 2.2 × 10−11 m2. A borehole dilution test indicates an average specific discharge value of 1.9 ± 2.8 × 10−6 m s−1. Ground-penetrating radar profiles and a groundwater flow model show the aquifer is draining laterally into a large nearby rift. Our findings indicate that the firn aquifer in the vicinity of the field site is likely not in a steady state and its presence likely contributed to past ice shelf instability. ©2020. The Authors.
英文关键词	Aquifers; Geological surveys; Ground penetrating radar systems; Groundwater flow; Groundwater resources; Hydraulic conductivity; Antarctica; Geometric mean value; Ground Penetrating Radar; Groundwater Flow Model; Hydrologic properties; Ice shelves; Measurements of; Steady state; Ice; aquifer; borehole; groundwater flow; hydraulic conductivity; hydraulic property; ice shelf; permeability; steady-state equilibrium; Antarctica; West Antarctica; Wilkins Ice Shelf
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169413
作者单位	Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Geography, Rutgers University, Piscataway, NJ, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Earth Science and Observation Center, University of Colorado, Boulder, CO, United States; National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Studies, Boulder, CO, United States; United States Geological Survey, Utah Water Science Center, Salt Lake City, UT, United States; Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States; Geography Department, University of Utah, Salt Lake City, UT, United States
推荐引用方式 GB/T 7714	Montgomery L.,Miège C.,Miller J.,et al. Hydrologic Properties of a Highly Permeable Firn Aquifer in the Wilkins Ice Shelf; Antarctica[J],2020,47(22).
APA	Montgomery L..,Miège C..,Miller J..,Scambos T.A..,Wallin B..,...&Koenig L..(2020).Hydrologic Properties of a Highly Permeable Firn Aquifer in the Wilkins Ice Shelf; Antarctica.Geophysical Research Letters,47(22).
MLA	Montgomery L.,et al."Hydrologic Properties of a Highly Permeable Firn Aquifer in the Wilkins Ice Shelf; Antarctica".Geophysical Research Letters 47.22(2020).