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dc.contributor.authorPorter, Philip R.
dc.contributor.authorVatne, Geir
dc.contributor.authorNg, Felix
dc.contributor.authorIrvine-Fynn, Tristram D. L.
dc.date.accessioned2012-12-19T09:29:42Z
dc.date.available2012-12-19T09:29:42Z
dc.date.issued2010
dc.identifier.citationPorter , P R , Vatne , G , Ng , F & Irvine-Fynn , T D L 2010 , ' Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard ' , Geografiska Annaler: Series A, Physical Geography , vol. 92A , no. 4 , pp. 437-449 . https://doi.org/10.1111/j.1468-0459.2010.00406.x
dc.identifier.issn0435-3676
dc.identifier.otherPURE: 359982
dc.identifier.otherPURE UUID: f2084682-7ced-49c5-b0e5-b356388ae007
dc.identifier.otherWOS: 000284962300002
dc.identifier.otherScopus: 78650042676
dc.identifier.urihttp://hdl.handle.net/2299/9457
dc.descriptionThe definitive version is found at: http://onlinelibrary.wiley.com/ Copyright Wiley-Blackwell
dc.description.abstractEnhanced delivery of water-saturated, ice-marginal sediments to the glacier surface is a response to glacier thinning that has the potential to increase both levels of sediment transfer through the glacier hydrological system and total basin sediment yields. Preliminary observations made during summer 2007 at Austre Br circle divide ggerbreen, Svalbard, confirm that ice-marginal debris flows in the upper reaches of the glacier are actively delivering sediments to the glacier surface, which may then be flushed into the glacier's hydrological system. During a four-day observation period, several stochastic pulses in water turbidity were observed at a single portal where solely supra- and englacial drainage emerge at the glacier margin. The erratic suspended sediment fluxes were hypothesized to originate from ice-marginal sources. Quantitative analysis of continuous turbidity and discharge data confirm that discharge is not driving these turbidity pulses and, combined with observational data, that the most likely origin is the delivery of water-saturated sediments to the glacier surface from ice-marginal, debris flows with subsequent transfer to the portal via the glacial drainage system. These observations illustrate the potential importance of the paraglacial component to the overall sediment cascade of deglaciating basins and highlight the need for careful interpretation of turbidity records, where stochastic pulses in turbidity may be attributed to sources and processes other than ice-marginal sediment inputs.en
dc.format.extent13
dc.language.isoeng
dc.relation.ispartofGeografiska Annaler: Series A, Physical Geography
dc.subjectice-marginal
dc.subjectparaglacial
dc.subjectsuspended sediment
dc.titleIce-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbarden
dc.contributor.institutionDepartment of Human and Environmental Sciences
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionHealth & Human Sciences Research Institute
dc.contributor.institutionGeography, Environment and Agriculture
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1468-0459.2010.00406.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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