Glaciers of the Mcmurdo Dry Valleys, Southern Victoria Land, Antarctica

2013 ◽  
pp. 65-75 ◽  
Author(s):  
Andrew G. Fountain ◽  
Gayle L. Dana ◽  
Karen J. Lewis ◽  
Bruce H. Vaughn ◽  
Diane H. Mcknight
Keyword(s):  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Victoria Land

scholarly journals Climatology of katabatic winds in the McMurdo dry valleys, southern Victoria Land, Antarctica

2004 ◽  
Vol 109 (D3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Thomas H. Nylen ◽  
Andrew G. Fountain ◽  
Peter T. Doran
Keyword(s):  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Katabatic Winds ◽  
Victoria Land

Evidence for regional climate change in the recent evolution of a high latitude pro-glacial lake

1996 ◽  
Vol 8 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Jenny Webster ◽  
Ian Hawes ◽  
Malcolm Downes ◽  
Michael Timperley ◽  
Clive Howard-Williams
Keyword(s):  
Mixed Layer ◽  
Lake Level ◽  
Regional Climate ◽  
Regional Climate Change ◽  
Physical Structure ◽  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
The North ◽  
Victoria Land ◽  
Upper Mixed Layer

Lake Wilson, a perennially ice-capped, deep (>100 m) lake at 80°S in southern Victoria Land was investigated in January 1993. Water chemistry and physical structure showed three distinct layers; an upper c. 35 m mixed layer of low salinity, moderately turbid water; a less turbid mid layer, 20 m thick of slightly higher salinity and supersaturated with oxygen; and a deep 20 m brackish layer (conductivity c. 4000 μS cm−1) with anoxic conditions in the lower 5 m. Extreme supersaturation of N2O (up to 400 times air saturation) together with high nitrate concentration (4000 mg m−3) was recorded in the deep layer. Phytoplankton biomass and photosynthetic activity was confined to the upper mixed layer and the band of supersaturated dissolved oxygen located at 40–55 m appears to represent a relict layer from when the lake level was lower. The evidence from a comparison of profiles between 1975 and 1993 suggests that Lake Wilson has risen 25 m since 1975, synchronous with a period of lake level rise in the McMurdo Dry Valleys lakes to the north at 77°S. Geochemical diffusion models indicate that Lake Wilson had evaporated to a smaller brine lake about 1000 yrs BP, which also fits the pattern shown by the McMurdo Dry Valleys lakes. Climate changes influencing lake levels have thus covered a wide area of southern Victoria Land.

A Late Holocene desiccation of Lake Hoare and Lake Fryxell, McMurdo Dry Valleys, Antarctica

1998 ◽  
Vol 10 (3) ◽  
pp. 247-256 ◽  
Author(s):  
W.B. Lyons ◽  
S.W. Tyler ◽  
R.A. Wharton ◽  
D.M. McKnight ◽  
B.H. Vaughn
Keyword(s):  
Late Holocene ◽  
Mcmurdo Dry Valleys ◽  
Published Data ◽  
Dry Valleys ◽  
Humid Climate ◽  
The Past ◽  
Victoria Land ◽  
History Of ◽  
Lake Fryxell ◽  
Climatic History

Stable isotope data from waters of lakes in the McMurdo Dry Valleys (MDV) of southern Victoria Land, Antarctica are presented in order to establish the climatic history of this region over the past two millennia. New data from Lake Fryxell and Lake Hoare in Toylor Valley, along with previously published data from Lake Vanda, Wright Valley and Lake Bonney, Taylor Valley are used to infer the recent climatic history of MDV. Lakes Vanda, Fryxell and Bonney appear to have lost their ice covers and evaporated to small, hypersaline ponds by 1000 to ~1200 yr BP. Lake Hoare either desiccated or did not exist prior to 1200 yr BP. These data indicate a major lowering of lake level prior to ~1000 yr BP, followed by a warmer and/or more humid climate since then.

Twenty-seventh Antarctic Treaty Consultative Meeting Cape Town, South Africa, 24 May–4 June 2004

Polar Record ◽  
2005 ◽  
Vol 41 (1) ◽  
pp. 77-96 ◽  
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Management Plan ◽  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Victoria Land ◽  
Antarctic Treaty ◽  
The Antarctic

The texts of the Decisions and Resolutions, and the text of Measure 1 (2004), together with a summary of the Management Plan for Antarctic Specially Managed area No. 2, McMurdo Dry Valleys, Southern Victoria Land, adopted at XXVII ATCM were reproduced in SCAR Bulletin No 155, October 2004. A summary of the Management Plan for Antarctic Specially Managed Area No. 3, Cape Denison, Commonwealth Bay, George V land, together with Measures 2–4, are reproduced here. The full versions of all the Decisions, Measures and Resolutions are on the Antarctic Treaty Secretariat website at http://www.ats.org.ar/

scholarly journals Extreme southern locations for moss sporophytes in Antarctica

1992 ◽  
Vol 4 (1) ◽  
pp. 37-39 ◽  
Author(s):  
R.D. Seppelt ◽  
T.G.A. Green ◽  
A-M.J. Schwarz ◽  
A. Frost
Keyword(s):  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Southern Limit ◽  
Taylor Valley ◽  
Victoria Land

Abundant immature sporophytes of the moss Pottia heimii are reported from the Lower Taylor Valley, McMurdo Dry Valleys and from Cape Chocolate, Victoria Land. These finds extend the reported southern limit for the occurrence of abundant moss sporophytes to 77° 55′S.

The origin of salts in water bodies of the McMurdo Dry Valleys

1998 ◽  
Vol 10 (4) ◽  
pp. 439-448 ◽  
Author(s):  
Nobuki Takamatsu ◽  
Naoyuki Kato ◽  
Genki I. Matsumoto ◽  
Tetsuya Torii
Keyword(s):  
Saline Water ◽  
Pond Water ◽  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Atmospheric Fallout ◽  
Soil Weathering ◽  
Victoria Land ◽  
Bottom Waters ◽  
History Of ◽  
Surface Ice

Lithium distributions in lake and pond waters of the McMurdo Dry Valleys of southern Victoria Land, Antarctica were studied to elucidate the origin of dissolved salts and the evolutionary history of the lakes and ponds. The EfLi [(Li/Cl)sample/(Li/Cl)seawater] values of the bottom waters in Lakes Bonney and Fryxell were higher than unity (EfLi=4–7), indicating that the salts originated from sea salts (probably relict seawater) and have been subsequently modified by the contribution of meltwaters containing atmospheric fallout and/or rock and soil weathering products. In contrast, extremely high Li concentrations with high EfLi values in the Don Juan Pond water (EfLi = 180) and the bottom waters of Lake Vanda (EfLi = 40) suggest that the salts originated from deep groundwaters influenced mainly by saline water-rock interactions, as supported by the dissolution experiments of granite in NaCl solution. The low Li concentrations of pond waters with high EfLi values in the Labyrinth indicate that the salts are derived from atmospheric fallout. The decrease of the EfLi values with the increase of Cl concentrations can be explained by the repeated cycles of the migration of Li into the ice phase and subsequent ablation of surface ice, as indicated by seawater freezing experiments.

THE IMPACT OF CLIMATE CHANGE ON LAKE VANDA, MCMURDO DRY VALLEYS, ANTARCTICA

2016 ◽  
Author(s):  
Devin Castendyk ◽  
◽  
Maciej K. Obryk ◽  
Sasha Z. Leidman ◽  
Michael Gooseff ◽  
...  
Keyword(s):  
Climate Change ◽  
Mcmurdo Dry Valleys ◽  
Dry Valleys ◽  
Impact Of Climate Change ◽  
The Impact
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