The characteristics and formation of a High-Arctic proglacial icing
Well-known from permafrost hydrology, icings (naled or Aufeis) are also frequently encountered at the margins of high-latitude glaciers. The morphology of a proglacial icing at Scott Turnerbreen in the Norwegian Arctic archipelago of Svalbard is described, and the process of formation is considered...
Published in: | Geografiska Annaler: Series A, Physical Geography |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/695e85eb-17ff-4754-a3d0-373e5477cb2e 2023-05-15T14:24:19+02:00 The characteristics and formation of a High-Arctic proglacial icing Hodgkins, R Tranter, M Dowdeswell, JA 2004 https://pure.au.dk/portal/da/publications/the-characteristics-and-formation-of-a-higharctic-proglacial-icing(695e85eb-17ff-4754-a3d0-373e5477cb2e).html https://doi.org/10.1111/j.0435-3676.2004.00230.x eng eng info:eu-repo/semantics/restrictedAccess Hodgkins , R , Tranter , M & Dowdeswell , JA 2004 , ' The characteristics and formation of a High-Arctic proglacial icing ' , Geografiska Annaler: Series A, Physical Geography , vol. 86A , no. 3 , pp. 265-275 . https://doi.org/10.1111/j.0435-3676.2004.00230.x proglacial icing Aufeis naled hydraulic conductivity SPITSBERGEN GLACIERS SOLUTE ACQUISITION SCOTT TURNERBREEN MASS-BALANCE SVALBARD HYDROCHEMISTRY MELTWATERS HYDROLOGY MODEL FLOW article 2004 ftuniaarhuspubl https://doi.org/10.1111/j.0435-3676.2004.00230.x 2023-03-01T23:56:38Z Well-known from permafrost hydrology, icings (naled or Aufeis) are also frequently encountered at the margins of high-latitude glaciers. The morphology of a proglacial icing at Scott Turnerbreen in the Norwegian Arctic archipelago of Svalbard is described, and the process of formation is considered in detail. Ground thermal-regime modelling indicates an equilibrium permafrost depth of at least 200 m in the studied catchment, and it appears unlikely that groundwater contributes to icing formation. Meltwater flow through ice-marginal drainage channels is accompanied by estimated heat fluxes of up to about 190 W m(-2), suggesting that stored meltwater may continue to percolate through thawed sub-channel sediments when surface runoff is absent during winter. A hydraulic conductivity of 6.9 x 10(-3) m s(-1) is implied, which is consistent with other studies of glacier drainage systems. The long residence time of winter-draining meltwater, and solute rejection by refreezing water, account for high observed concentrations of solute in interstitial water in the icing. It has often been asserted that the presence of a proglacial icing indicates that a glacier is polythermal. However, as Scott Turnerbeen is entirely non-temperate, the presence of an icing cannot always be treated as a reliable guide to the thermal regime of a glacier. Article in Journal/Newspaper Arctic Arctic Archipelago Arctic glacier Ice permafrost Svalbard Spitsbergen Aarhus University: Research Arctic Scott Turnerbreen ENVELOPE(15.967,15.967,78.100,78.100) Svalbard Geografiska Annaler: Series A, Physical Geography 86 3 265 275 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
proglacial icing Aufeis naled hydraulic conductivity SPITSBERGEN GLACIERS SOLUTE ACQUISITION SCOTT TURNERBREEN MASS-BALANCE SVALBARD HYDROCHEMISTRY MELTWATERS HYDROLOGY MODEL FLOW |
spellingShingle |
proglacial icing Aufeis naled hydraulic conductivity SPITSBERGEN GLACIERS SOLUTE ACQUISITION SCOTT TURNERBREEN MASS-BALANCE SVALBARD HYDROCHEMISTRY MELTWATERS HYDROLOGY MODEL FLOW Hodgkins, R Tranter, M Dowdeswell, JA The characteristics and formation of a High-Arctic proglacial icing |
topic_facet |
proglacial icing Aufeis naled hydraulic conductivity SPITSBERGEN GLACIERS SOLUTE ACQUISITION SCOTT TURNERBREEN MASS-BALANCE SVALBARD HYDROCHEMISTRY MELTWATERS HYDROLOGY MODEL FLOW |
description |
Well-known from permafrost hydrology, icings (naled or Aufeis) are also frequently encountered at the margins of high-latitude glaciers. The morphology of a proglacial icing at Scott Turnerbreen in the Norwegian Arctic archipelago of Svalbard is described, and the process of formation is considered in detail. Ground thermal-regime modelling indicates an equilibrium permafrost depth of at least 200 m in the studied catchment, and it appears unlikely that groundwater contributes to icing formation. Meltwater flow through ice-marginal drainage channels is accompanied by estimated heat fluxes of up to about 190 W m(-2), suggesting that stored meltwater may continue to percolate through thawed sub-channel sediments when surface runoff is absent during winter. A hydraulic conductivity of 6.9 x 10(-3) m s(-1) is implied, which is consistent with other studies of glacier drainage systems. The long residence time of winter-draining meltwater, and solute rejection by refreezing water, account for high observed concentrations of solute in interstitial water in the icing. It has often been asserted that the presence of a proglacial icing indicates that a glacier is polythermal. However, as Scott Turnerbeen is entirely non-temperate, the presence of an icing cannot always be treated as a reliable guide to the thermal regime of a glacier. |
format |
Article in Journal/Newspaper |
author |
Hodgkins, R Tranter, M Dowdeswell, JA |
author_facet |
Hodgkins, R Tranter, M Dowdeswell, JA |
author_sort |
Hodgkins, R |
title |
The characteristics and formation of a High-Arctic proglacial icing |
title_short |
The characteristics and formation of a High-Arctic proglacial icing |
title_full |
The characteristics and formation of a High-Arctic proglacial icing |
title_fullStr |
The characteristics and formation of a High-Arctic proglacial icing |
title_full_unstemmed |
The characteristics and formation of a High-Arctic proglacial icing |
title_sort |
characteristics and formation of a high-arctic proglacial icing |
publishDate |
2004 |
url |
https://pure.au.dk/portal/da/publications/the-characteristics-and-formation-of-a-higharctic-proglacial-icing(695e85eb-17ff-4754-a3d0-373e5477cb2e).html https://doi.org/10.1111/j.0435-3676.2004.00230.x |
long_lat |
ENVELOPE(15.967,15.967,78.100,78.100) |
geographic |
Arctic Scott Turnerbreen Svalbard |
geographic_facet |
Arctic Scott Turnerbreen Svalbard |
genre |
Arctic Arctic Archipelago Arctic glacier Ice permafrost Svalbard Spitsbergen |
genre_facet |
Arctic Arctic Archipelago Arctic glacier Ice permafrost Svalbard Spitsbergen |
op_source |
Hodgkins , R , Tranter , M & Dowdeswell , JA 2004 , ' The characteristics and formation of a High-Arctic proglacial icing ' , Geografiska Annaler: Series A, Physical Geography , vol. 86A , no. 3 , pp. 265-275 . https://doi.org/10.1111/j.0435-3676.2004.00230.x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.0435-3676.2004.00230.x |
container_title |
Geografiska Annaler: Series A, Physical Geography |
container_volume |
86 |
container_issue |
3 |
container_start_page |
265 |
op_container_end_page |
275 |
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1766296744293826560 |