Hydrologic monitoring of supercooled meltwater from Icelandic glaciers
Knowledge of how glaciers entrain sediment is central to understanding processes of glacier movement and products of glacial sediment deposition. Previous work has shown that if the total hydraulic potential of subglacial meltwater increases more rapidly than the resulting mechanical energy can be t...
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Online Access: | http://eprints.staffs.ac.uk/1731/ https://doi.org/10.1016/j.quascirev.2004.11.020 |
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ftustaffordshire:oai:eprints.staffs.ac.uk:1731 2023-05-15T16:20:32+02:00 Hydrologic monitoring of supercooled meltwater from Icelandic glaciers TWEED, Fiona Roberts, Matthew J. Russell, Andrew J. 2005 http://eprints.staffs.ac.uk/1731/ https://doi.org/10.1016/j.quascirev.2004.11.020 unknown Elsevier TWEED, Fiona , Roberts, Matthew J. and Russell, Andrew J. (2005) Hydrologic monitoring of supercooled meltwater from Icelandic glaciers. Quaternary Science Reviews, 24 (22). pp. 2308-2318. ISSN 02773791 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2005 ftustaffordshire https://doi.org/10.1016/j.quascirev.2004.11.020 2023-03-02T23:14:36Z Knowledge of how glaciers entrain sediment is central to understanding processes of glacier movement and products of glacial sediment deposition. Previous work has shown that if the total hydraulic potential of subglacial meltwater increases more rapidly than the resulting mechanical energy can be transformed into sensible heat, then supercooling and ice growth will result. This process causes frazil ice to grow onto adjacent glacier ice, which acts to trap sediment in flowing meltwater eventually producing sedimentary inclusions within glacier ice. Supercooling has been recognised as a sediment entrainment mechanism at glaciers in Alaska, and more recently at several temperate Icelandic glaciers. Here we present short-period temperature measurements and field evidence of glaciohydraulic supercooling from three Icelandic glaciers. Temperature measurements demonstrate that supercooling occurs over a range of hydrological conditions and that the process does not operate continuously at all instrumented sites. Measurements of supercooling during a small jökulhlaup are also presented. Progressive accretion of supercooled meltwater creates sediment-laden ice exposures adjacent to active artesian vents. Understanding controls on the efficacy and pervasiveness of hydraulic supercooling is important for decoding the sedimentary record of modern and ancient glaciers and ice sheets. Article in Journal/Newspaper glacier glaciers Alaska Staffordshire University: STORE - Staffordshire Online Repository Quaternary Science Reviews 24 22 2308 2318 |
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Open Polar |
collection |
Staffordshire University: STORE - Staffordshire Online Repository |
op_collection_id |
ftustaffordshire |
language |
unknown |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences TWEED, Fiona Roberts, Matthew J. Russell, Andrew J. Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Knowledge of how glaciers entrain sediment is central to understanding processes of glacier movement and products of glacial sediment deposition. Previous work has shown that if the total hydraulic potential of subglacial meltwater increases more rapidly than the resulting mechanical energy can be transformed into sensible heat, then supercooling and ice growth will result. This process causes frazil ice to grow onto adjacent glacier ice, which acts to trap sediment in flowing meltwater eventually producing sedimentary inclusions within glacier ice. Supercooling has been recognised as a sediment entrainment mechanism at glaciers in Alaska, and more recently at several temperate Icelandic glaciers. Here we present short-period temperature measurements and field evidence of glaciohydraulic supercooling from three Icelandic glaciers. Temperature measurements demonstrate that supercooling occurs over a range of hydrological conditions and that the process does not operate continuously at all instrumented sites. Measurements of supercooling during a small jökulhlaup are also presented. Progressive accretion of supercooled meltwater creates sediment-laden ice exposures adjacent to active artesian vents. Understanding controls on the efficacy and pervasiveness of hydraulic supercooling is important for decoding the sedimentary record of modern and ancient glaciers and ice sheets. |
format |
Article in Journal/Newspaper |
author |
TWEED, Fiona Roberts, Matthew J. Russell, Andrew J. |
author_facet |
TWEED, Fiona Roberts, Matthew J. Russell, Andrew J. |
author_sort |
TWEED, Fiona |
title |
Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
title_short |
Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
title_full |
Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
title_fullStr |
Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
title_full_unstemmed |
Hydrologic monitoring of supercooled meltwater from Icelandic glaciers |
title_sort |
hydrologic monitoring of supercooled meltwater from icelandic glaciers |
publisher |
Elsevier |
publishDate |
2005 |
url |
http://eprints.staffs.ac.uk/1731/ https://doi.org/10.1016/j.quascirev.2004.11.020 |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_relation |
TWEED, Fiona , Roberts, Matthew J. and Russell, Andrew J. (2005) Hydrologic monitoring of supercooled meltwater from Icelandic glaciers. Quaternary Science Reviews, 24 (22). pp. 2308-2318. ISSN 02773791 |
op_doi |
https://doi.org/10.1016/j.quascirev.2004.11.020 |
container_title |
Quaternary Science Reviews |
container_volume |
24 |
container_issue |
22 |
container_start_page |
2308 |
op_container_end_page |
2318 |
_version_ |
1766008466645712896 |