Role of glaciohydraulic supercooling in the formation of stratified facies basal ice: Svínafellsjökull and Skaftafellsjökull, southeast Iceland

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dc.contributor.author Fairchild, Ian J.
dc.contributor.author Boomer, Ian
dc.contributor.author Waller, Richard I.
dc.contributor.author Knight, Peter G.
dc.contributor.author Robinson, Zoe P.
dc.contributor.author Cook, Simon J.
dc.date.accessioned 2010-11-23T15:56:58Z
dc.date.available 2010-11-23T15:56:58Z
dc.date.issued 2009-08-04
dc.identifier.citation Fairchild , I J , Boomer , I , Waller , R I , Knight , P G , Robinson , Z P & Cook , S J 2009 , ' Role of glaciohydraulic supercooling in the formation of stratified facies basal ice: Svínafellsjökull and Skaftafellsjökull, southeast Iceland ' Boreas , pp. 24-38 . en
dc.identifier.issn 1502-3885
dc.identifier.other PURE: 153965
dc.identifier.other dspace: 2160/5936
dc.identifier.uri http://hdl.handle.net/2160/5936
dc.description Cook S, Robinson Z, Fairchild I, Knight P, Waller R, Boomer I. (2010). Role of glaciohydraulic supercooling in the formation of stratified facies basal ice: Svínafellsjökull and Skaftafellsjökull, southeast Iceland. Boreas, 39(1), 24-38. en
dc.description.abstract 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 (δ18O 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 m3 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 m3 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 en
dc.format.extent 15 en
dc.language.iso eng
dc.relation.ispartof Boreas en
dc.title Role of glaciohydraulic supercooling in the formation of stratified facies basal ice: Svínafellsjökull and Skaftafellsjökull, southeast Iceland en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1111/j.1502-3885.2009.00112.x
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en


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