The geochemistry of upland ponds, Taylor Valley, Antarctica
Abstract 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 pr...
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crcambridgeupr:10.1017/s0954102011000617 2024-03-03T08:38:12+00:00 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. 2011 http://dx.doi.org/10.1017/s0954102011000617 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000617 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 24, issue 1, page 3-14 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2011 crcambridgeupr https://doi.org/10.1017/s0954102011000617 2024-02-08T08:25:41Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost Cambridge University Press McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Antarctic Science 24 1 3 14 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography 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 |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract 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. |
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 (CUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1017/s0954102011000617 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000617 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
McMurdo Dry Valleys Taylor Valley |
geographic_facet |
McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost |
genre_facet |
Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost |
op_source |
Antarctic Science volume 24, issue 1, page 3-14 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102011000617 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
1 |
container_start_page |
3 |
op_container_end_page |
14 |
_version_ |
1792505539019669504 |