Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland
There is need for a quantitative assessment of the importance of glaciohydraulic supercooling for basal ice formation and glacial sediment transfer. We assess the contribution of supercooling to stratified facies basal ice formation at Svínafellsjökull and Skaftafellsjökull, southeast Iceland, both...
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Language: | English |
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2010
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Online Access: | https://discovery.dundee.ac.uk/en/publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 https://doi.org/10.1111/j.1502-3885.2009.00112.x http://www.scopus.com/inward/record.url?scp=77953955339&partnerID=8YFLogxK |
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ftunivdundeepure:oai:discovery.dundee.ac.uk:publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 2024-05-19T07:42:41+00:00 Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland Cook, Simon J. Robinson, Zoe P. Fairchild, Ian J. Knight, Peter G. Waller, Richard I. Boomer, Ian 2010-01 https://discovery.dundee.ac.uk/en/publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 https://doi.org/10.1111/j.1502-3885.2009.00112.x http://www.scopus.com/inward/record.url?scp=77953955339&partnerID=8YFLogxK eng eng https://discovery.dundee.ac.uk/en/publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 info:eu-repo/semantics/closedAccess Cook , S J , Robinson , Z P , Fairchild , I J , Knight , P G , Waller , R I & Boomer , I 2010 , ' Role of glaciohydraulic supercooling in the formation of stratified facies basal ice : Svínafellsjökull and Skaftafellsjökull, southeast Iceland ' , Boreas , vol. 39 , no. 1 , pp. 24-38 . https://doi.org/10.1111/j.1502-3885.2009.00112.x /dk/atira/pure/subjectarea/asjc/1200/1204 name=Archaeology /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 name=Geology article 2010 ftunivdundeepure https://doi.org/10.1111/j.1502-3885.2009.00112.x 2024-05-01T00:16:07Z There is need for a quantitative assessment of the importance of glaciohydraulic supercooling for basal ice formation and glacial sediment transfer. We assess the contribution of supercooling to stratified facies basal ice formation at Svínafellsjökull and Skaftafellsjökull, southeast Iceland, both of which experience supercooling. Five stratified basal ice subfacies have previously been identified at Svínafellsjökull, but their precise origins have not been determined. Analysis of stratified basal ice stable isotope compositions (δ 18 O and δD), spatial distribution and physical characteristics demonstrates that two subfacies present at both glaciers are consistent with supercooling. These 'supercool' subfacies account for 42% of stratified facies exposed at Svínafellsjökull, although estimates at Skaftafellsjökull are precluded by limited basal ice exposure. Owing to their high debris contents, supercooling-related facies contribute a debris flux of 4.8 to 9.6 m 3 m -1 a -1 at Svínafellsjökull (83% of the stratified facies debris flux). Other stratified subfacies, formed by non-supercooling processes, account for 58% of the stratified basal ice at Svínafellsjökull, but only contribute a debris flux of 1.0 to 2.0 m 3 m -1 a -1 (17% of the stratified facies debris flux). We conclude that supercooling has a significant role in glacial sediment transfer, although in stratified basal ice formation its role is less significant at these locations than has been reported elsewhere. Article in Journal/Newspaper Iceland Discovery - University of Dundee Online Publications Boreas 39 1 24 38 |
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Open Polar |
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Discovery - University of Dundee Online Publications |
op_collection_id |
ftunivdundeepure |
language |
English |
topic |
/dk/atira/pure/subjectarea/asjc/1200/1204 name=Archaeology /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 name=Geology |
spellingShingle |
/dk/atira/pure/subjectarea/asjc/1200/1204 name=Archaeology /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 name=Geology Cook, Simon J. Robinson, Zoe P. Fairchild, Ian J. Knight, Peter G. Waller, Richard I. Boomer, Ian Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
topic_facet |
/dk/atira/pure/subjectarea/asjc/1200/1204 name=Archaeology /dk/atira/pure/subjectarea/asjc/1100/1105 name=Ecology Evolution Behavior and Systematics /dk/atira/pure/subjectarea/asjc/1900/1907 name=Geology |
description |
There is need for a quantitative assessment of the importance of glaciohydraulic supercooling for basal ice formation and glacial sediment transfer. We assess the contribution of supercooling to stratified facies basal ice formation at Svínafellsjökull and Skaftafellsjökull, southeast Iceland, both of which experience supercooling. Five stratified basal ice subfacies have previously been identified at Svínafellsjökull, but their precise origins have not been determined. Analysis of stratified basal ice stable isotope compositions (δ 18 O and δD), spatial distribution and physical characteristics demonstrates that two subfacies present at both glaciers are consistent with supercooling. These 'supercool' subfacies account for 42% of stratified facies exposed at Svínafellsjökull, although estimates at Skaftafellsjökull are precluded by limited basal ice exposure. Owing to their high debris contents, supercooling-related facies contribute a debris flux of 4.8 to 9.6 m 3 m -1 a -1 at Svínafellsjökull (83% of the stratified facies debris flux). Other stratified subfacies, formed by non-supercooling processes, account for 58% of the stratified basal ice at Svínafellsjökull, but only contribute a debris flux of 1.0 to 2.0 m 3 m -1 a -1 (17% of the stratified facies debris flux). We conclude that supercooling has a significant role in glacial sediment transfer, although in stratified basal ice formation its role is less significant at these locations than has been reported elsewhere. |
format |
Article in Journal/Newspaper |
author |
Cook, Simon J. Robinson, Zoe P. Fairchild, Ian J. Knight, Peter G. Waller, Richard I. Boomer, Ian |
author_facet |
Cook, Simon J. Robinson, Zoe P. Fairchild, Ian J. Knight, Peter G. Waller, Richard I. Boomer, Ian |
author_sort |
Cook, Simon J. |
title |
Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
title_short |
Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
title_full |
Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
title_fullStr |
Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
title_full_unstemmed |
Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:Svínafellsjökull and Skaftafellsjökull, southeast Iceland |
title_sort |
role of glaciohydraulic supercooling in the formation of stratified facies basal ice:svínafellsjökull and skaftafellsjökull, southeast iceland |
publishDate |
2010 |
url |
https://discovery.dundee.ac.uk/en/publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 https://doi.org/10.1111/j.1502-3885.2009.00112.x http://www.scopus.com/inward/record.url?scp=77953955339&partnerID=8YFLogxK |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Cook , S J , Robinson , Z P , Fairchild , I J , Knight , P G , Waller , R I & Boomer , I 2010 , ' Role of glaciohydraulic supercooling in the formation of stratified facies basal ice : Svínafellsjökull and Skaftafellsjökull, southeast Iceland ' , Boreas , vol. 39 , no. 1 , pp. 24-38 . https://doi.org/10.1111/j.1502-3885.2009.00112.x |
op_relation |
https://discovery.dundee.ac.uk/en/publications/2b3c8d53-6ea8-49e8-8dd2-80481d0a0846 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/j.1502-3885.2009.00112.x |
container_title |
Boreas |
container_volume |
39 |
container_issue |
1 |
container_start_page |
24 |
op_container_end_page |
38 |
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1799482380458655744 |