globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-9-439-2015
Scopus记录号: 2-s2.0-84923853483
论文题名:
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice
作者: Dugan H; A; , Doran P; T; , Wagner B; , Kenig F; , Fritsen C; H; , Arcone S; A; , Kuhn E; , Ostrom N; E; , Warnock J; P; , Murray A; E
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期:2
起始页码: 439
结束页码: 450
语种: 英语
英文关键词: brine ; cryosphere ; Holocene ; ice cover ; isotopic composition ; lacustrine deposit ; luminescence dating ; radiocarbon dating ; runoff ; stratigraphy ; Antarctica ; East Antarctica ; Lake Vida ; McMurdo Dry Valleys ; Victoria Valley [McMurdo Dry Valleys]
英文摘要: Lake Vida, located in Victoria Valley, is one of the largest lakes in the McMurdo dry valleys and is known to contain hypersaline liquid brine sealed below 16 m of freshwater ice. For the first time, Lake Vida was drilled to a depth of 27 m. Below 21 m the ice is marked by well-sorted sand layers up to 20 cm thick within a matrix of salty ice. From ice chemistry, isotopic composition of δ18O and δ2H, and ground penetrating radar profiles, we conclude that the entire 27 m of ice formed from surface runoff and the sediment layers represent the accumulation of surface deposits. Radiocarbon and optically stimulated luminescence dating limit the maximum age of the lower ice to 6300 14C yr BP. As the ice cover ablated downwards during periods of low surface inflow, progressive accumulation of sediment layers insulated and preserved the ice and brine beneath, analogous to the processes that preserve shallow ground ice. The repetition of these sediment layers reveals hydrologic variability in Victoria Valley during the mid- to late Holocene. Lake Vida is an exemplar site for understanding the preservation of subsurface brine, ice, and sediment in a cold desert environment. © Author(s) 2015.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75332
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL, United States; Center for Limnology, University of Wisconsin-Madison, Madison, WI, United States; Institute of Geology and Mineralogy, University of Cologne, Cologne, Germany; Division of Earth and Ecosystem Sciences, Desert Research Institute, Reno, NV, United States; US Army Cold Regions Research and Engineering Laboratory, Hanover, NH, United States; Department of Zoology, Michigan State University, East Lansing, MI, United States; Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb, IL, United States

Recommended Citation:
Dugan H,A,, Doran P,et al. Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice[J]. Cryosphere,2015-01-01,9(2)
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