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dc.contributor.authorDell, Rebeccaen
dc.contributor.authorArnold, Neilen
dc.contributor.authorWillis, Ianen
dc.contributor.authorBanwell, Alisonen
dc.contributor.authorWilliamson, Andrewen
dc.contributor.authorPritchard, Hamishen
dc.contributor.authorOrr, Andrewen
dc.date.accessioned2020-07-23T23:30:29Z
dc.date.available2020-07-23T23:30:29Z
dc.identifier.issn1994-0416
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/308335
dc.description.abstractSurface meltwater on ice shelves can exist as slush, it can pond in lakes or crevasses, or it can flow in surface streams and rivers. The collapse of the Larsen B Ice Shelf in 2002 has been attributed to the sudden drainage of ~3000 surface lakes, and has highlighted the potential for surface water to cause ice-shelf instability. Surface meltwater systems have been identified across numerous Antarctic ice shelves, although the extent to which these systems impact ice-shelf instability is poorly constrained. To better understand the role of surface meltwater systems on ice shelves, it is important to track their seasonal development, monitoring the fluctuations in surface water volume and the transfer of water across ice-shelf surfaces. Here, we use Landsat 8 and Sentinel-2 imagery to track surface meltwater across the Nivlisen Ice Shelf in the 2016-2017 melt season. We develop the Fully Automated Supraglacial-Water Tracking algorithm for Ice Shelves (FASTISh) and use it to identify and track the development of 1598 water bodies, which we classify as either circular or linear. The total volume of surface meltwater peaks on 26th January 2017 at 5.5 x 107 m3. At this time, 63% of the total volume is held within two linear surface meltwater systems, which are up to 27 km long, are orientated along the ice shelf’s north-south axis, and follow the surface slope. Over the course of the melt season, they appear to migrate away from the grounding line, while growing in size and enveloping smaller water bodies. This suggests there is large-scale lateral water transfer through the surface meltwater system and the firn pack towards the ice-shelf front during the summer.
dc.publisherCopernicus Publications
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleLateral meltwater transfer across an Antarctic ice shelfen
dc.typeArticle
prism.publicationNameThe Cryosphereen
dc.identifier.doi10.17863/CAM.55427
dcterms.dateAccepted2020-06-16en
rioxxterms.versionofrecord10.5194/tc-14-2313-2020en
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-06-16en
dc.contributor.orcidDell, Rebecca [0000-0001-6617-3906]
dc.contributor.orcidArnold, Neil [0000-0001-7538-3999]
dc.contributor.orcidWillis, Ian [0000-0002-0750-7088]
dc.contributor.orcidBanwell, Alison [0000-0001-9545-829X]
dc.identifier.eissn1994-0424
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/L002507/1)
pubs.funder-project-idNERC (NE/L002507/1)
cam.issuedOnline2020-07-22en
datacite.issupplementedby.doi10.5446/47526en
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.54008


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International