Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10789
DC FieldValueLanguage
dc.date.accessioned2018-02-22T14:04:26Zen
dc.date.available2018-02-22T14:04:26Zen
dc.date.issued2017en
dc.identifier.urihttp://hdl.handle.net/2122/10789en
dc.description.abstractA high-resolution (1 km line spacing) aerogeophysical survey was conducted over a region near the East Antarctic Ice Sheet’s Dome C that may hold a 1.5 Myr climate record. We combined new ice thickness data derived from an airborne coherent radar sounder with unpublished data that was in part unavailable for earlier compilations, and we were able to remove older data with high positional uncertainties. We generated a revised high-resolution digital elevation model (DEM) to investigate the potential for an old ice record in this region, and used laser altimetry to confirm a Cryosat-2 derived DEM for inferring the glaciological state of the candidate area. By measuring the specularity content of the bed, we were able to find an additional 50 subglacial lakes near the candidate site, and by Doppler focusing the radar data, we were able to map out the roughness of the bed at length scales of hundreds of meters. We find that the primary candidate region contains elevated rough topography interspersed with scattered subglacial lakes and some regions of smoother bed. Free subglacial water appears to be restricted from bed overlain by ice thicknesses of less than 3000 m. A site near the ice divide was selected for further investigation. The high resolution of this ice thickness data set also allows us to explore the nature of ice thickness uncertainties in the context of radar geometry and processing.en
dc.language.isoEnglishen
dc.relation.ispartofThe Cryosphereen
dc.relation.ispartofseries/11 (2017)en
dc.rightsCC0 1.0 Universalen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.titleHigh-resolution boundary conditions of an old ice target near Dome C, Antarcticaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1897-1911en
dc.identifier.doi10.5194/tc-11-1897-2017en
dc.description.obiettivoSpecifico5A. Paleoclima e ricerche polarien
dc.description.journalTypeJCR Journalen
dc.contributor.authorYoung, Duncan A.en
dc.contributor.authorRoberts, Jason L.en
dc.contributor.authorRitz, Catherineen
dc.contributor.authorFrezzotti, Massimoen
dc.contributor.authorQuartini, Enricaen
dc.contributor.authorCavitte, Marie G. P.en
dc.contributor.authorTozer, Carly R.en
dc.contributor.authorSteinhage, Danielen
dc.contributor.authorUrbini, Stefanoen
dc.contributor.authorCorr, Hugh F. J.en
dc.contributor.authorvan Ommen, Tasen
dc.contributor.authorBlankenship, Donald D.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptENEA-CRE, Casaccia, Rome, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0001-7485-543X-
crisitem.author.orcid0000-0002-5777-0933-
crisitem.author.orcid0000-0002-8053-4197-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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