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dc.contributor.authorHow, P.
dc.contributor.authorBenn, D. I.
dc.contributor.authorHulton, N. R. J.
dc.contributor.authorHubbard, B.
dc.contributor.authorLuckman, A.
dc.contributor.authorSevestre, H.
dc.contributor.authorvan Pelt, W. J. J.
dc.contributor.authorLindbäck, K.
dc.contributor.authorKohler, J.
dc.contributor.authorBoot, W.
dc.date.accessioned2017-12-01T15:30:10Z
dc.date.available2017-12-01T15:30:10Z
dc.date.issued2017-11-21
dc.identifier.citationHow , P , Benn , D I , Hulton , N R J , Hubbard , B , Luckman , A , Sevestre , H , van Pelt , W J J , Lindbäck , K , Kohler , J & Boot , W 2017 , ' Rapidly changing subglacial hydrological pathways at a tidewater glacier revealed through simultaneous observations of water pressure, supraglacial lakes, meltwater plumes and surface velocities ' , The Cryosphere , vol. 11 , no. 6 , pp. 2691-2710 . https://doi.org/10.5194/tc-11-2691-2017en
dc.identifier.issn1994-0416
dc.identifier.otherPURE: 251678933
dc.identifier.otherPURE UUID: 88d10041-f51d-4302-be3a-5a9d963a523d
dc.identifier.otherBibtex: urn:dbb26e57a8317092d9f2d0dbef4c322c
dc.identifier.otherScopus: 85035069558
dc.identifier.otherWOS: 000415829000003
dc.identifier.otherORCID: /0000-0002-3604-0886/work/64697386
dc.identifier.urihttps://hdl.handle.net/10023/12222
dc.descriptionThis work was funded by the Conoco Phillips-Lundin Northern Area Program through the CRIOS project (Calving Rates and Impact On Sea level, http://www.researchinsvalbard.no/project/7037). Penelope How is supported by a NERC PhD studentship.en
dc.description.abstractSubglacial hydrological processes at tidewater glaciers remain poorly understood due to the difficulty in obtaining direct measurements and lack of empirical verification for modelling approaches. Here, we investigate the subglacial hydrology of Kronebreen, a fast-flowing tidewater glacier in Svalbard during the 2014 melt season. We combine observations of borehole water pressure, supraglacial lake drainage, surface velocities and plume activity with modelled run-off and water routing to develop a conceptual model that thoroughly encapsulates subglacial drainage at a tidewater glacier. Simultaneous measurements suggest that an early-season episode of subglacial flushing took place during our observation period, and a stable efficient drainage system effectively transported subglacial water through the northern region of the glacier tongue. Drainage pathways through the central and southern regions of the glacier tongue were disrupted throughout the following melt season. Periodic plume activity at the terminus appears to be a signal for modulated subglacial pulsing, i.e. an internally driven storage and release of subglacial meltwater that operates independently of marine influences. This storage is a key control on ice flow in the 2014 melt season. Evidence from this work and previous studies strongly suggests that long-term changes in ice flow at Kronebreen are controlled by the location of efficient/inefficient drainage and the position of regions where water is stored and released.
dc.format.extent20
dc.language.isoeng
dc.relation.ispartofThe Cryosphereen
dc.rights© Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.en
dc.subjectGE Environmental Sciencesen
dc.subjectQE Geologyen
dc.subject3rd-DASen
dc.subjectSDG 14 - Life Below Wateren
dc.subject.lccGEen
dc.subject.lccQEen
dc.titleRapidly changing subglacial hydrological pathways at a tidewater glacier revealed through simultaneous observations of water pressure, supraglacial lakes, meltwater plumes and surface velocitiesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Geography & Sustainable Developmenten
dc.contributor.institutionUniversity of St Andrews. Bell-Edwards Geographic Data Instituteen
dc.identifier.doihttps://doi.org/10.5194/tc-11-2691-2017
dc.description.statusPeer revieweden


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