Show simple item record

dc.contributor.authorSiegert, MJen
dc.contributor.authorKulessa, Ben
dc.contributor.authorBougamont, Marionen
dc.contributor.authorChristoffersen, Poulen
dc.contributor.authorKey, Ken
dc.contributor.authorAndersen, KRen
dc.contributor.authorBooth, ADen
dc.contributor.authorSmith, AMen
dc.date.accessioned2017-03-27T10:38:28Z
dc.date.available2017-03-27T10:38:28Z
dc.date.issued2018en
dc.identifier.issn0305-8719
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/263250
dc.description.abstractIs groundwater abundant in Antarctica and does it modulate ice flow? Answering this question matters because ice streams flow by gliding over a wet substrate of till. Water fed to ice-stream beds thus influences ice-sheet dynamics and, potentially, sea-level rise. It is recognised that both till and the sedimentary basins from which it originates are porous and could host a reservoir of mobile groundwater that interacts with the subglacial interfacial system. According to recent numerical modelling up to half of all water available for basal lubrication, and time lags between hydrological forcing and ice-sheet response as long as millennia, may have been overlooked in models of ice flow. Here, we review evidence in support of Antarctic groundwater and propose how it can be measured to ascertain the extent to which it modulates ice flow. We present new seismoelectric soundings of subglacial till, and magnetotelluric and transient electromagnetic forward models of subglacial groundwater reservoirs. We demonstrate that multi-facetted and integrated geophysical datasets can detect, delineate and quantify the groundwater contents of subglacial sedimentary basins and, potentially, monitor groundwater exchange rates between subglacial till layers. The paper thus describes a new area of glaciological investigation and how it should progress in future.
dc.description.sponsorshipThe institution of the lead author (Imperial College London) has paid for Gold Open Access for this article.
dc.language.isoenen
dc.publisherGeological Society
dc.titleAntarctic subglacial groundwater: a concept paper on its measurement and potential influence on ice flowen
dc.typeArticle
prism.endingPage213
prism.publicationDate2018en
prism.publicationNameGeological Society Special Publicationsen
prism.startingPage197
prism.volume461en
dc.identifier.doi10.17863/CAM.8570
dcterms.dateAccepted2017-02-15en
rioxxterms.versionofrecord10.1144/SP461.8en
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2018en
dc.contributor.orcidBougamont, Marion [0000-0001-7196-4171]
dc.contributor.orcidChristoffersen, Poul [0000-0003-2643-8724]
dc.identifier.eissn2041-4927
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idIsaac Newton Trust (1222(i))
pubs.funder-project-idNERC (NE/J005800/1)
cam.issuedOnline2017-05-25en
cam.orpheus.successThu Jan 30 12:56:34 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record