The geochemistry of upland ponds, Taylor Valley, Antarctica
This is a copy of an article published in the Antarctic Science © 2011 Cambridge University Press. The final publication is available at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8483351. The McMurdo Dry Valleys of Antarctica are the largest ice-free region on the...
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ftunivillchic:oai:dspace-prod.lib.uic.edu:10027/10780 2023-05-15T13:30:35+02:00 The geochemistry of upland ponds, Taylor Valley, Antarctica Lyons, W. Berry Welch, Kathleen A. Gardner, Christopher B. Jaros, Chris Moorhead, Daryl L. Knoepfle, Jennifer L. Doran, Peter T. 2012-02 http://hdl.handle.net/10027/10780 en_US eng Cambridge University Press climate variation evapoconcentration mcmurdo dry valleys meltwater solutes Article 2012 ftunivillchic 2018-09-19T06:19:52Z This is a copy of an article published in the Antarctic Science © 2011 Cambridge University Press. The final publication is available at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8483351. The McMurdo Dry Valleys of Antarctica are the largest ice-free region on the continent. These valleys contain numerous water bodies that receive seasonal melt from glaciers. For forty years, research emphasis has been placed on the larger water bodies, the permanent ice-covered lakes. We present results from the first study describing the geochemistry of ponds in the higher elevations of Taylor Valley. Unlike the lakes at lower elevations, the landscape on which these ponds lie is among the oldest in Taylor Valley. These upland ponds wax and wane in size depending on the local climatic conditions, and their ionic concentrations and isotopic composition vary annually depending on the amount of meltwater generated and their hydrologic connectivity. This study evaluates the impact of changes in summer climate on the chemistry of these ponds. Although pond chemistry reflects the initial meltwater chemistry, dissolution and chemical weathering within the stream channels, and possibly permafrost fluid input, the primary control is the dilution effect of glacier melt during warmer summers. These processes lead to differences in solute concentrations and ionic ratios between ponds, despite their nearby proximity. The change in size of these ponds over time has important consequences on their geochemical behaviour and potential to provide water and solutes to the subsurface. This work was supported by NSF grants - OPP Ant-0423595 and Opp-98136061. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost University of Illinois at Chicago: UIC INDIGO (INtellectual property in DIGital form available online in an Open environment) Antarctic McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) The Antarctic |
institution |
Open Polar |
collection |
University of Illinois at Chicago: UIC INDIGO (INtellectual property in DIGital form available online in an Open environment) |
op_collection_id |
ftunivillchic |
language |
English |
topic |
climate variation evapoconcentration mcmurdo dry valleys meltwater solutes |
spellingShingle |
climate variation evapoconcentration mcmurdo dry valleys meltwater solutes Lyons, W. Berry Welch, Kathleen A. Gardner, Christopher B. Jaros, Chris Moorhead, Daryl L. Knoepfle, Jennifer L. Doran, Peter T. The geochemistry of upland ponds, Taylor Valley, Antarctica |
topic_facet |
climate variation evapoconcentration mcmurdo dry valleys meltwater solutes |
description |
This is a copy of an article published in the Antarctic Science © 2011 Cambridge University Press. The final publication is available at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8483351. The McMurdo Dry Valleys of Antarctica are the largest ice-free region on the continent. These valleys contain numerous water bodies that receive seasonal melt from glaciers. For forty years, research emphasis has been placed on the larger water bodies, the permanent ice-covered lakes. We present results from the first study describing the geochemistry of ponds in the higher elevations of Taylor Valley. Unlike the lakes at lower elevations, the landscape on which these ponds lie is among the oldest in Taylor Valley. These upland ponds wax and wane in size depending on the local climatic conditions, and their ionic concentrations and isotopic composition vary annually depending on the amount of meltwater generated and their hydrologic connectivity. This study evaluates the impact of changes in summer climate on the chemistry of these ponds. Although pond chemistry reflects the initial meltwater chemistry, dissolution and chemical weathering within the stream channels, and possibly permafrost fluid input, the primary control is the dilution effect of glacier melt during warmer summers. These processes lead to differences in solute concentrations and ionic ratios between ponds, despite their nearby proximity. The change in size of these ponds over time has important consequences on their geochemical behaviour and potential to provide water and solutes to the subsurface. This work was supported by NSF grants - OPP Ant-0423595 and Opp-98136061. |
format |
Article in Journal/Newspaper |
author |
Lyons, W. Berry Welch, Kathleen A. Gardner, Christopher B. Jaros, Chris Moorhead, Daryl L. Knoepfle, Jennifer L. Doran, Peter T. |
author_facet |
Lyons, W. Berry Welch, Kathleen A. Gardner, Christopher B. Jaros, Chris Moorhead, Daryl L. Knoepfle, Jennifer L. Doran, Peter T. |
author_sort |
Lyons, W. Berry |
title |
The geochemistry of upland ponds, Taylor Valley, Antarctica |
title_short |
The geochemistry of upland ponds, Taylor Valley, Antarctica |
title_full |
The geochemistry of upland ponds, Taylor Valley, Antarctica |
title_fullStr |
The geochemistry of upland ponds, Taylor Valley, Antarctica |
title_full_unstemmed |
The geochemistry of upland ponds, Taylor Valley, Antarctica |
title_sort |
geochemistry of upland ponds, taylor valley, antarctica |
publisher |
Cambridge University Press |
publishDate |
2012 |
url |
http://hdl.handle.net/10027/10780 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic McMurdo Dry Valleys Taylor Valley The Antarctic |
geographic_facet |
Antarctic McMurdo Dry Valleys Taylor Valley The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost |
genre_facet |
Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost |
_version_ |
1766010502070140928 |