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dc.contributor.authorSTORRAR, RDen_US
dc.contributor.authorEvans, DJAen_US
dc.contributor.authorStokes, CRen_US
dc.contributor.authorEwertowski, Men_US
dc.date.accessioned2015-06-19T08:33:35Z
dc.date.available2015-02-19en_US
dc.date.issued2015-09-15en_US
dc.identifier.urihttp://qmro.qmul.ac.uk/jspui/handle/123456789/7720
dc.descriptionThis is the peer reviewed version of the following article: Controls on the location, morphology and evolution of complex esker systems at decadal timescales, Breiðamerkurjökull, southeast Iceland, which has been published in final form at 10.1002/esp.3725. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
dc.description.abstractThis paper uses detailed mapping of eskers to address three questions which are important for reconstructing meltwater behaviour beneath contemporary and ancient ice masses: ‘What controls the morphology of simple and complex esker systems?’, ‘How do esker systems evolve through time?’ and ‘Are esker patterns compatible with groundwater controlled hydraulic spacing of esker tunnels?’. Esker crestlines and widths are mapped on the Breiðamerkurjökull foreland for eight time slices between 1945 and 2007, from high resolution (~50 cm) aerial photography, permitting their long-term morphological evolution to be analysed in a high level of detail. We find that complex eskers develop where meltwater and sediment is abundant, such that sediment clogs channels, forming distributary eskers. Isolated eskers are simpler and smaller and reflect less abundant meltwater and sediment, which is unable to clog channels. Eskers may take several decades to emerge from outwash deposits containing buried ice and can increase or decrease in size when ice surrounding and underlying them melts out. It has been suggested that groundwater–channel coupling dictates the spacing between eskers at Breiðamerkurjökull. Our results do not dispute this, but suggest that the routing of sediment and meltwater through medial moraines is an additional important control on esker location and spacing. These results may be used to better understand the processes surrounding esker formation in a variety of geographical settings, enabling a more detailed understanding of the operation of meltwater drainage systems in sub-marginal zones beneath glaciers and ice sheets.en_US
dc.relation.ispartofEarth Surface Processes and Landformsen_US
dc.rightsThis is a pre-copyedited, author-produced version of an article accepted for publication in Earth Surface Processes and Landforms following peer review. The version of record is available http://onlinelibrary.wiley.com/doi/10.1002/esp.3725/abstract?
dc.titleControls on the location, morphology and evolution of complex esker systems at decadal timescales, Breiðamerkurjökull, southeast Icelanden_US
dc.typeArticle
dc.rights.holderCopyright © 2015 John Wiley & Sons, Ltd.
dc.identifier.doi10.1002/esp.3725en_US
pubs.notes12 monthsen_US
pubs.organisational-group/Queen Mary University of London
pubs.organisational-group/Queen Mary University of London/Faculty of Humanities, Social Sciences & Law
pubs.organisational-group/Queen Mary University of London/Faculty of Humanities, Social Sciences & Law/Geography - Staff
pubs.publication-statusPublisheden_US
dcterms.dateAccepted2015-02-19en_US


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