Universität zu Köln

Dugan, H. A., Doran, P. T., Wagner, B., Kenig, F., Fritsen, C. H., Arcone, S. A., Kuhn, E., Ostrom, N. E., Warnock, J. P. and Murray, A. E. (2015). Stratigraphy of Lake Vida, Antarctica: hydrologic implications of 27 m of ice. Cryosphere, 9 (2). S. 439 - 451. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1994-0424

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Abstract

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 delta O-18 and delta H-2, 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 C-14 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Dugan, H. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Doran, P. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wagner, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kenig, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fritsen, C. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Arcone, S. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuhn, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ostrom, N. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Warnock, J. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murray, A. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-416676
DOI:	10.5194/tc-9-439-2015
Journal or Publication Title:	Cryosphere
Volume:	9
Number:	2
Page Range:	S. 439 - 451
Date:	2015
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1994-0424
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MCMURDO DRY VALLEYS; SOUTHERN VICTORIA LAND; TAYLOR VALLEY; ISOTOPE GEOCHEMISTRY; UNIVERSITY VALLEY; GROUND ICE; HOARE; FRYXELL; DEPOSITS; QUARTZ Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41667