HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA
In the McMurdo Dry Valleys, glacial meltwater streams are a critical linkage between the glaciers and the lakes in the valley bottoms. This paper analyzes the physiographic characteristics and six years of discharge data from five streams in order to better characterize the dynamic inputs into Lake...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.615.3680 2023-05-15T14:00:16+02:00 HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA Peter A. Conovitzl Diane M. Mcknight Lee H. Macdonaldl Andrew G. Fountain Harold R. House The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.615.3680 http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.615.3680 http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf text ftciteseerx 2016-01-08T14:43:01Z In the McMurdo Dry Valleys, glacial meltwater streams are a critical linkage between the glaciers and the lakes in the valley bottoms. This paper analyzes the physiographic characteristics and six years of discharge data from five streams in order to better characterize the dynamic inputs into Lake Fryxell, a closed basin in Taylor Valley. These feeder streams typically flow only for six to eight weeks during the summer, and streamflow is highly variable on an interannual as well as daily basis. During low flow years, the shorter streams contributed a higher proportion of the total annual inflow into the lake; this pattern may reflect the greater losses to wetting the hyporheic zone. Comparisons of the period of direct sun on the glacier faces with the time of peak flow suggested that solar position and melt from the glacier faces are the dominant controls on the diurnal fluctuations in streamflow. An analysis of streamflow recession showed considerable variability between streams and in some cases, over time. For example, recession coefficients for Canada Stream, a short stream with an incised channel, were fairly invariant with streamflow. In contrast, the recession coefficients for Lost Seal Stream, an unconfined, low gradient stream, increased significantly with increasing discharge. These observations lead to hypotheses for the control of streamflow dynamics in the McMurdo Dry Valleys by climate, solar position, and geomotphic factors. Text Antarc* Antarctica glacier* McMurdo Dry Valleys Unknown Canada Canada Stream ENVELOPE(163.050,163.050,-77.617,-77.617) Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lost Seal Stream ENVELOPE(163.233,163.233,-77.600,-77.600) McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) |
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ftciteseerx |
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English |
description |
In the McMurdo Dry Valleys, glacial meltwater streams are a critical linkage between the glaciers and the lakes in the valley bottoms. This paper analyzes the physiographic characteristics and six years of discharge data from five streams in order to better characterize the dynamic inputs into Lake Fryxell, a closed basin in Taylor Valley. These feeder streams typically flow only for six to eight weeks during the summer, and streamflow is highly variable on an interannual as well as daily basis. During low flow years, the shorter streams contributed a higher proportion of the total annual inflow into the lake; this pattern may reflect the greater losses to wetting the hyporheic zone. Comparisons of the period of direct sun on the glacier faces with the time of peak flow suggested that solar position and melt from the glacier faces are the dominant controls on the diurnal fluctuations in streamflow. An analysis of streamflow recession showed considerable variability between streams and in some cases, over time. For example, recession coefficients for Canada Stream, a short stream with an incised channel, were fairly invariant with streamflow. In contrast, the recession coefficients for Lost Seal Stream, an unconfined, low gradient stream, increased significantly with increasing discharge. These observations lead to hypotheses for the control of streamflow dynamics in the McMurdo Dry Valleys by climate, solar position, and geomotphic factors. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Peter A. Conovitzl Diane M. Mcknight Lee H. Macdonaldl Andrew G. Fountain Harold R. House |
spellingShingle |
Peter A. Conovitzl Diane M. Mcknight Lee H. Macdonaldl Andrew G. Fountain Harold R. House HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
author_facet |
Peter A. Conovitzl Diane M. Mcknight Lee H. Macdonaldl Andrew G. Fountain Harold R. House |
author_sort |
Peter A. Conovitzl |
title |
HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
title_short |
HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
title_full |
HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
title_fullStr |
HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
title_full_unstemmed |
HYDROLOGIC PROCESSES INFLUENCING STREAMFLOW VARIATION IN FRYXELL BASIN, ANTARCTICA |
title_sort |
hydrologic processes influencing streamflow variation in fryxell basin, antarctica |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.615.3680 http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf |
long_lat |
ENVELOPE(163.050,163.050,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.233,163.233,-77.600,-77.600) ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Canada Canada Stream Fryxell Lake Fryxell Lost Seal Stream McMurdo Dry Valleys Taylor Valley |
geographic_facet |
Canada Canada Stream Fryxell Lake Fryxell Lost Seal Stream McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctica glacier* McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica glacier* McMurdo Dry Valleys |
op_source |
http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.615.3680 http://warnercnr.colostate.edu/~leemac/publications/HydrologicProcessesInfluencingStreamflowVariationinFryxellBasinAntartica.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766269301857189888 |