Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica
primary source of water to streams, lakes, and associated ecosystems. To understand geochemical fluxes and ecological responses to past and future climates requires a physically based energy balance model. We applied a one-dimensional model to one site on Taylor Glacier using 11 years of daily meteo...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.575.5249 2023-05-15T13:30:31+02:00 Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica Matthew J. Hoffman Andrew G. Fountain Glen E. Liston The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.5249 http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.5249 http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf text 2008 ftciteseerx 2016-01-08T12:44:07Z primary source of water to streams, lakes, and associated ecosystems. To understand geochemical fluxes and ecological responses to past and future climates requires a physically based energy balance model. We applied a one-dimensional model to one site on Taylor Glacier using 11 years of daily meteorological data and seasonal ablation measurements. Inclusion of transmission of solar radiation into the ice was necessary to accurately model summer ablation and ice temperatures. Results showed good correspondence between calculated and measured ablation and ice temperatures over the 11 years. Ablation (18 cm a1) was dominated by sublimation with very few occurrences of melt (42 days during 11 years). Results also indicated that above freezing air temperatures did not necessarily result in melt and, in turn, melt occurred during subfreezing air temperatures under some conditions. For air temperatures near freezing, low wind speed was critically important for melt initiation. According to the model, subsurface melt, away from rocks and sediment in the ice, occurred three times more frequently than surface melt; occurs no deeper than 50 cm below the glacier surface; and was small, never exceeding 8 % by mass. The magnitude of subsurface melting and the energy balance indicate that Taylor Glacier ice is intermediate in optical properties between snow and blue ice. Text Antarc* Antarctica Taylor Glacier Unknown Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
primary source of water to streams, lakes, and associated ecosystems. To understand geochemical fluxes and ecological responses to past and future climates requires a physically based energy balance model. We applied a one-dimensional model to one site on Taylor Glacier using 11 years of daily meteorological data and seasonal ablation measurements. Inclusion of transmission of solar radiation into the ice was necessary to accurately model summer ablation and ice temperatures. Results showed good correspondence between calculated and measured ablation and ice temperatures over the 11 years. Ablation (18 cm a1) was dominated by sublimation with very few occurrences of melt (42 days during 11 years). Results also indicated that above freezing air temperatures did not necessarily result in melt and, in turn, melt occurred during subfreezing air temperatures under some conditions. For air temperatures near freezing, low wind speed was critically important for melt initiation. According to the model, subsurface melt, away from rocks and sediment in the ice, occurred three times more frequently than surface melt; occurs no deeper than 50 cm below the glacier surface; and was small, never exceeding 8 % by mass. The magnitude of subsurface melting and the energy balance indicate that Taylor Glacier ice is intermediate in optical properties between snow and blue ice. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Matthew J. Hoffman Andrew G. Fountain Glen E. Liston |
spellingShingle |
Matthew J. Hoffman Andrew G. Fountain Glen E. Liston Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
author_facet |
Matthew J. Hoffman Andrew G. Fountain Glen E. Liston |
author_sort |
Matthew J. Hoffman |
title |
Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
title_short |
Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
title_full |
Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
title_fullStr |
Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
title_full_unstemmed |
Surface energy balance and melt thresholds over 11 years at Taylor Glacier, Antarctica |
title_sort |
surface energy balance and melt thresholds over 11 years at taylor glacier, antarctica |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.5249 http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf |
long_lat |
ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
Taylor Glacier |
geographic_facet |
Taylor Glacier |
genre |
Antarc* Antarctica Taylor Glacier |
genre_facet |
Antarc* Antarctica Taylor Glacier |
op_source |
http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.5249 http://glaciers.pdx.edu/fountain/MyPapers/HoffmanEtAl2008_SurfaceEnergyBalanceTaylorGlacier.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766009587402539008 |