Environmental Sciences and Resources: Geology
In the McMurdo Dry Valleys, Victoria Land, East Antarctica, melting of glacial ice is the primary source of water to streams, lakes, and associated ecosystems. To better understand meltwater production, three hypotheses are tested: 1) that small changes in the surface energy balance on these glacier...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.670.799 2023-05-15T13:46:40+02:00 Environmental Sciences and Resources: Geology The Mcmurdo Dry Valleys Matthew James Hoffman Martin Lafrenz Glen Liston Alan Yeakley The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.799 http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.799 http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf text ftciteseerx 2016-01-08T17:21:24Z In the McMurdo Dry Valleys, Victoria Land, East Antarctica, melting of glacial ice is the primary source of water to streams, lakes, and associated ecosystems. To better understand meltwater production, three hypotheses are tested: 1) that small changes in the surface energy balance on these glaciers will result in large changes in melt, 2) that subsurface melt does not contribute significantly to runoff, and 3) that melt from 25-m high terminal cliffs is the dominant source of baseflow during cold periods. These hypotheses were investigated using a surface energy balance model applied to the glaciers of Taylor Valley using 14 years of meteorological data and calibrated to ablation measurements. Inclusion of transmission of solar radiation into the ice through a source term in a one-dimensional heat transfer equation was necessary to accurately model summer ablation and ice temperatures. Results showed good correspondence between calculated and measured ablation and ice temperatures over the 14 years using both daily and hourly time steps, but an hourly time step allowed resolution of short duration melt events and melt within the Text Antarc* Antarctica East Antarctica McMurdo Dry Valleys Victoria Land Unknown East Antarctica McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Victoria Land |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
In the McMurdo Dry Valleys, Victoria Land, East Antarctica, melting of glacial ice is the primary source of water to streams, lakes, and associated ecosystems. To better understand meltwater production, three hypotheses are tested: 1) that small changes in the surface energy balance on these glaciers will result in large changes in melt, 2) that subsurface melt does not contribute significantly to runoff, and 3) that melt from 25-m high terminal cliffs is the dominant source of baseflow during cold periods. These hypotheses were investigated using a surface energy balance model applied to the glaciers of Taylor Valley using 14 years of meteorological data and calibrated to ablation measurements. Inclusion of transmission of solar radiation into the ice through a source term in a one-dimensional heat transfer equation was necessary to accurately model summer ablation and ice temperatures. Results showed good correspondence between calculated and measured ablation and ice temperatures over the 14 years using both daily and hourly time steps, but an hourly time step allowed resolution of short duration melt events and melt within the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
The Mcmurdo Dry Valleys Matthew James Hoffman Martin Lafrenz Glen Liston Alan Yeakley |
spellingShingle |
The Mcmurdo Dry Valleys Matthew James Hoffman Martin Lafrenz Glen Liston Alan Yeakley Environmental Sciences and Resources: Geology |
author_facet |
The Mcmurdo Dry Valleys Matthew James Hoffman Martin Lafrenz Glen Liston Alan Yeakley |
author_sort |
The Mcmurdo Dry Valleys |
title |
Environmental Sciences and Resources: Geology |
title_short |
Environmental Sciences and Resources: Geology |
title_full |
Environmental Sciences and Resources: Geology |
title_fullStr |
Environmental Sciences and Resources: Geology |
title_full_unstemmed |
Environmental Sciences and Resources: Geology |
title_sort |
environmental sciences and resources: geology |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.799 http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
East Antarctica McMurdo Dry Valleys Taylor Valley Victoria Land |
geographic_facet |
East Antarctica McMurdo Dry Valleys Taylor Valley Victoria Land |
genre |
Antarc* Antarctica East Antarctica McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctica East Antarctica McMurdo Dry Valleys Victoria Land |
op_source |
http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.799 http://glaciers.pdx.edu/Thesis/Hoffman/Hoffman_ETD_converted.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766245059098836992 |