Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica
Numerous ephemeral streams flow within the McMurdo Dry Valley Region of Antarctica that transport glacial meltwater to perennially ice-covered, closed-basin lakes during the austral summer. The diurnal behavior for two Taylor Valley streams of different character was examined during the summer of 20...
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ftunivmemphis:oai:digitalcommons.memphis.edu:facpubs-4722 2024-09-09T19:11:04+00:00 Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica Harmon, Russell S. Leslie, Deborah L. Lyons, W. Berry Welch, Kathleen A. McKnight, Diane M. 2019-06-07T07:00:00Z https://digitalcommons.memphis.edu/facpubs/3723 https://doi.org/10.1051/e3sconf/20199801020 unknown University of Memphis Digital Commons https://digitalcommons.memphis.edu/facpubs/3723 doi:10.1051/e3sconf/20199801020 https://doi.org/10.1051/e3sconf/20199801020 Faculty Publications Earth Sciences text 2019 ftunivmemphis https://doi.org/10.1051/e3sconf/20199801020 2024-08-08T23:30:43Z Numerous ephemeral streams flow within the McMurdo Dry Valley Region of Antarctica that transport glacial meltwater to perennially ice-covered, closed-basin lakes during the austral summer. The diurnal behavior for two Taylor Valley streams of different character was examined during the summer of 2010-11. Andersen Creek is a short, 1st-order proglacial stream, whereas Von Guerard Stream is a long, high-order stream with an extensive hyporheic zone that has a substantial cyanobacterial algal mat community in its middle reaches. Both streams display strong daily cycles for temperature, electrical conductivity, dissolved oxygen, and pH. Conductivity varies in concert with flow, with solute dilution occurring during the daily high-flow pulse. Dissolved oxygen co-varies strongly with pH at Andersen Creek but not for Von Guerard Stream. Each stream has a distinct geochemical character that for Andersen Creek is a direct reflection of its glacial source, unmodified by secondary effects, whereas that for Von Guerard Stream is modulated by its resident algal mat community and through extensive hyporheic zone interaction and exchange. Text Antarc* Antarctica University of Memphis Digital Commons Andersen Creek ENVELOPE(162.900,162.900,-77.617,-77.617) Austral Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Von Guerard Stream ENVELOPE(163.250,163.250,-77.617,-77.617) E3S Web of Conferences 98 01020 |
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University of Memphis Digital Commons |
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ftunivmemphis |
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unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Harmon, Russell S. Leslie, Deborah L. Lyons, W. Berry Welch, Kathleen A. McKnight, Diane M. Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
topic_facet |
Earth Sciences |
description |
Numerous ephemeral streams flow within the McMurdo Dry Valley Region of Antarctica that transport glacial meltwater to perennially ice-covered, closed-basin lakes during the austral summer. The diurnal behavior for two Taylor Valley streams of different character was examined during the summer of 2010-11. Andersen Creek is a short, 1st-order proglacial stream, whereas Von Guerard Stream is a long, high-order stream with an extensive hyporheic zone that has a substantial cyanobacterial algal mat community in its middle reaches. Both streams display strong daily cycles for temperature, electrical conductivity, dissolved oxygen, and pH. Conductivity varies in concert with flow, with solute dilution occurring during the daily high-flow pulse. Dissolved oxygen co-varies strongly with pH at Andersen Creek but not for Von Guerard Stream. Each stream has a distinct geochemical character that for Andersen Creek is a direct reflection of its glacial source, unmodified by secondary effects, whereas that for Von Guerard Stream is modulated by its resident algal mat community and through extensive hyporheic zone interaction and exchange. |
format |
Text |
author |
Harmon, Russell S. Leslie, Deborah L. Lyons, W. Berry Welch, Kathleen A. McKnight, Diane M. |
author_facet |
Harmon, Russell S. Leslie, Deborah L. Lyons, W. Berry Welch, Kathleen A. McKnight, Diane M. |
author_sort |
Harmon, Russell S. |
title |
Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
title_short |
Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
title_full |
Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
title_fullStr |
Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
title_full_unstemmed |
Diurnal chemistry of two contrasting stream types, Taylor Valley, McMurdo Dry Valley Region, Antarctica |
title_sort |
diurnal chemistry of two contrasting stream types, taylor valley, mcmurdo dry valley region, antarctica |
publisher |
University of Memphis Digital Commons |
publishDate |
2019 |
url |
https://digitalcommons.memphis.edu/facpubs/3723 https://doi.org/10.1051/e3sconf/20199801020 |
long_lat |
ENVELOPE(162.900,162.900,-77.617,-77.617) ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(163.250,163.250,-77.617,-77.617) |
geographic |
Andersen Creek Austral Taylor Valley Von Guerard Stream |
geographic_facet |
Andersen Creek Austral Taylor Valley Von Guerard Stream |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.memphis.edu/facpubs/3723 doi:10.1051/e3sconf/20199801020 https://doi.org/10.1051/e3sconf/20199801020 |
op_doi |
https://doi.org/10.1051/e3sconf/20199801020 |
container_title |
E3S Web of Conferences |
container_volume |
98 |
container_start_page |
01020 |
_version_ |
1809826728699232256 |