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dc.contributor.authorBunce, Charlie
dc.contributor.authorNienow, Peter
dc.contributor.authorSole, Andrew
dc.contributor.authorCowton, Tom
dc.contributor.authorDavison, Ben
dc.date.accessioned2021-01-11T11:30:02Z
dc.date.available2021-01-11T11:30:02Z
dc.date.issued2020-12-29
dc.identifier.citationBunce , C , Nienow , P , Sole , A , Cowton , T & Davison , B 2020 , ' Influence of glacier runoff and near-terminus subglacial hydrology on frontal ablation at a large Greenlandic tidewater glacier ' , Journal of Glaciology , vol. First View . https://doi.org/10.1017/jog.2020.109en
dc.identifier.issn0022-1430
dc.identifier.otherPURE: 272129467
dc.identifier.otherPURE UUID: aad1fe0b-6047-4bc9-8266-eaf4cf3140da
dc.identifier.otherORCID: /0000-0001-9483-2956/work/86538342
dc.identifier.otherORCID: /0000-0003-1668-7372/work/86538442
dc.identifier.otherScopus: 85098696217
dc.identifier.otherWOS: 000629692500012
dc.identifier.urihttp://hdl.handle.net/10023/21257
dc.descriptionCharlie Bunce is supported by a NERC DTP studentship (NE/L002558/1). Ben Davison is funded by the Scottish Alliance for Geoscience, Environment and Society (SAGES) and University of St. Andrews. We acknowledge field and research grants from the RGS-IBG postgraduate research fund and Mackay/Weir Greenland Fund (University of Edinburgh) awarded to Charlie Bunce and RGS-IBG postgraduate research fund, Mackay/Weir Greenland Fund (University of Edinburgh) and Centenary Funding (University of Edinburgh) awarded to Alexis Moyer (University of Edinburgh).en
dc.description.abstractFrontal ablation from tidewater glaciers is a major component of the total mass loss from the Greenland ice sheet. It remains unclear, however, how changes in atmospheric and oceanic temperatures translate into changes in frontal ablation, in part due to sparse observations at sufficiently high spatial and temporal resolution. We present high-frequency time-lapse imagery (photos every 30 min) of iceberg calving and meltwater plumes at Kangiata Nunaata Sermia (KNS), southwest Greenland, during June–October 2017, alongside satellite-derived ice velocities and modelled subglacial discharge. Early in the melt season, we infer a subglacial hydrological network with multiple outlets that would theoretically distribute discharge and enhance undercutting by submarine melt, an inference supported by our observations of terminus-wide calving during this period. During the melt season, we infer hydraulic evolution to a relatively more channelised subglacial drainage configuration, based on meltwater plume visibility indicating focused emergence of subglacial water; these observations coincide with a reduction in terminus-wide calving and transition to an incised planform terminus geometry. We suggest that temporal variations in subglacial discharge and near-terminus subglacial hydraulic efficiency exert considerable influence on calving and frontal ablation at KNS.
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofJournal of Glaciologyen
dc.rightsCopyright © The Author(s), 2020. Published by Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.subjectArctic glaciologyen
dc.subjectIce/ocean interactionsen
dc.subjectIceberg calvingen
dc.subjectG Geography (General)en
dc.subjectNDASen
dc.subject.lccG1en
dc.titleInfluence of glacier runoff and near-terminus subglacial hydrology on frontal ablation at a large Greenlandic tidewater glacieren
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.contributor.institutionUniversity of St Andrews.Environmental Change Research Groupen
dc.identifier.doihttps://doi.org/10.1017/jog.2020.109
dc.description.statusPeer revieweden


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