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dc.contributor.authorChristoffersen, Poulen
dc.contributor.authorBougamont, Marionen
dc.contributor.authorCarter, Sasha Pen
dc.contributor.authorFricker, Helen Aen
dc.contributor.authorTulaczyk, Slaweken
dc.date.accessioned2014-03-28T09:59:01Z
dc.date.available2014-03-28T09:59:01Z
dc.date.issued2014-03-26en
dc.identifier.citationGeophysical Research Letters 41, DOI:10.1002/2014GL059250en
dc.identifier.issn0094-8276
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/245226
dc.description.abstractSatellite observations have revealed active hydrologic systems beneath Antarctic ice streams, but sources and sinks of water within these systems are uncertain. Here we use numerical simulations of ice streams to estimate the generation, flux, and budget of water beneath five ice streams on the Siple Coast. We estimate that 47% of the total hydrologic input (0.98 km3 yr−1) to Whillans (WIS), Mercer (MIS), and Kamb (KIS) ice streams comes from the ice sheet interior and that only 8% forms by local basal melting. The remaining 45% comes from a groundwater reservoir, an overlooked source in which depletion significantly exceeds recharge. Of the total input to Bindschadler (BIS) and MacAyeal (MacIS) ice streams (0.56 km3 yr−1), 72% comes from the interior, 19% from groundwater, and 9% from local melting. This contrasting hydrologic setting modulates the ice streams flow and has important implications for the search for life in subglacial lakes.
dc.description.sponsorshipThis work was carried out with support from the Isaac Newton Trust, Cecil H. and Ida M. Green Foundation and Natural Environment Research Council (grant NE/E005950/1 and NE/J005800/1).
dc.languageEnglishen
dc.language.isoenen
dc.publisherWiley on behalf of the American Geophysical Union
dc.rightsAttribution-NonCommercial 2.0 UK: England & Wales*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/2.0/uk/*
dc.titleSignificant groundwater contribution to Antarctic ice streams hydrologic budgeten
dc.typeArticle
dc.description.versionThis is the final version of the article. It was originally published in Geophysical Research Letters and is also available from the Wiley website at http://onlinelibrary.wiley.com/doi/10.1002/2014GL059250/abstract. © American Geophysical Union 2014en
prism.publicationDate2014en
prism.publicationNameGeophysical Research Lettersen
prism.volume41en
dc.rioxxterms.funderNERC
dc.rioxxterms.projectidNE/E005950/1
dc.rioxxterms.projectidNE/J005800/1
rioxxterms.versionofrecord10.1002/2014GL059250en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2014-03-26en
dc.contributor.orcidChristoffersen, Poul [0000-0003-2643-8724]
dc.contributor.orcidBougamont, Marion [0000-0001-7196-4171]
dc.identifier.eissn1944-8007
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/E005950/1)
pubs.funder-project-idNERC (NE/J005800/1)
rioxxterms.freetoread.startdate2014-09-26


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Attribution-NonCommercial 2.0 UK: England & Wales
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