CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES
ABSTRACT. During the 1984 and 1985 melt seasons, flow velocities and dispersive characteristics of the englacial and subglacial hydraulic system on Storglaciaren, a small valley glacier in northern Sweden, were studied with the use of dye-trace tests. Similar tests conducted on one of the two princi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.429.4986 2023-05-15T17:44:49+02:00 CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES Z. Seaberg John Z. Seaberg Roger Leb Hooke Daniel W Wiberg The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.4986 http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.4986 http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf Crevasses text ftciteseerx 2016-01-08T04:31:22Z ABSTRACT. During the 1984 and 1985 melt seasons, flow velocities and dispersive characteristics of the englacial and subglacial hydraulic system on Storglaciaren, a small valley glacier in northern Sweden, were studied with the use of dye-trace tests. Similar tests conducted on one of the two principal pro-glacial streams provided a basis for comparison of the combined englacial-subglacial system with the pro-glacial one. Velocities in the two systems were broadly comparable after compensating for the effect of slope differences. However, velocities in the glacial conduits increased almost linearly with discharge. Analysis suggests that this can be explained by an increase in water pressure in the conduits, combined with a decrease in effective sinuosity, as discharge increases. Dispersivity (the ratio of the dispersion coefficient to the water velocity) in the glacial system is high early in the season but decreases progressively during July. This is believed to reflect a change from an extensively braided to a more integrated drainage system. Dispersivity is only slightly lower in the pro-glacial streams than in the late-season glacial conduits, suggesting similar degrees of braiding. However, retardation of dye due to temporary storage is greater in the glacial conduits. This suggests that the glacial streams have a larger number of stable eddies in which dye can be trapped for extended periods of time. Text Northern Sweden Unknown |
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Crevasses Z. Seaberg John Z. Seaberg Roger Leb Hooke Daniel W Wiberg CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
topic_facet |
Crevasses |
description |
ABSTRACT. During the 1984 and 1985 melt seasons, flow velocities and dispersive characteristics of the englacial and subglacial hydraulic system on Storglaciaren, a small valley glacier in northern Sweden, were studied with the use of dye-trace tests. Similar tests conducted on one of the two principal pro-glacial streams provided a basis for comparison of the combined englacial-subglacial system with the pro-glacial one. Velocities in the two systems were broadly comparable after compensating for the effect of slope differences. However, velocities in the glacial conduits increased almost linearly with discharge. Analysis suggests that this can be explained by an increase in water pressure in the conduits, combined with a decrease in effective sinuosity, as discharge increases. Dispersivity (the ratio of the dispersion coefficient to the water velocity) in the glacial system is high early in the season but decreases progressively during July. This is believed to reflect a change from an extensively braided to a more integrated drainage system. Dispersivity is only slightly lower in the pro-glacial streams than in the late-season glacial conduits, suggesting similar degrees of braiding. However, retardation of dye due to temporary storage is greater in the glacial conduits. This suggests that the glacial streams have a larger number of stable eddies in which dye can be trapped for extended periods of time. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Z. Seaberg John Z. Seaberg Roger Leb Hooke Daniel W Wiberg |
author_facet |
Z. Seaberg John Z. Seaberg Roger Leb Hooke Daniel W Wiberg |
author_sort |
Z. Seaberg |
title |
CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
title_short |
CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
title_full |
CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
title_fullStr |
CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
title_full_unstemmed |
CHARACTER OF THE ENGLACIAL AND SUB GLACIAL DRAINAGE SYSTEM IN THE LOWER PART OF THE ABLATION AREA OF STORGLACIAREN, SWEDEN, AS REVEALED BY DYE-TRACE STUDIES |
title_sort |
character of the englacial and sub glacial drainage system in the lower part of the ablation area of storglaciaren, sweden, as revealed by dye-trace studies |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.4986 http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.4986 http://www.igsoc.org/journal/34/117/igs_journal_vol34_issue117_pg217-227.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766147113826123776 |