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• W3198111908 abstract "PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsInvestigating a large subglacial lake drainage in East Antarctica with ice-penetrating radarAuthors: Matthew R. SiegfriedDustin M. SchroederWilson SauthoffMatthew R. SiegfriedColorado School of Mines and Stanford UniversitySearch for more papers by this author, Dustin M. SchroederStanford UniversitySearch for more papers by this author, and Wilson SauthoffColorado School of Mines; Benjamin Smith, University of WashingtonSearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3582777.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractSpatially coherent surface-height anomalies have been mapped in regions of fast ice-flow across Antarctica. These features have been interpreted as the surface manifestation of a dynamic subglacial water system, with up to cubic kilometers of water moving into and out of active subglacial lakes on timescales of months to decades. By impounding and episodically releasing water, these subglacial lakes have been hypothesized to drive regional hydrological variability and modify the flow of the overlying ice. However, no datasets have been available with high enough time resolution to simultaneously observe surface-height motion and image the ice-bed interface through a hypothesized subglacial lake drainage event, leaving the relationship between surface-height anomalies, the basal environment, and ice dynamics unclear. Using satellite altimetry from the CryoSat-2 and ICESat-2 missions and repeat airborne laser altimetry and ice-penetrating radar from Operation IceBridge, we investigate a large subglacial lake drainage event at Slessor Glacier, East Antarctica, which is the most rapid drainage event on record in Antarctica. We demonstrate that although regional-scale radar bed-echo return power analysis does not suggest a change in bed properties before and after drainage, more refined processing of radar sounding data guided by contextual datasets provides an opportunity to test hypotheses about subglacial hydrological processes.Keywords: Antarctica, hydrology, remote sensingPermalink: https://doi.org/10.1190/segam2021-3582777.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Matthew R. Siegfried, Dustin M. Schroeder, and Wilson Sauthoff, (2021), Investigating a large subglacial lake drainage in East Antarctica with ice-penetrating radar, SEG Technical Program Expanded Abstracts : 3120-3124. https://doi.org/10.1190/segam2021-3582777.1 Plain-Language Summary KeywordsAntarcticahydrologyremote sensingPDF DownloadLoading ..." @default.
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• W3198111908 title "Investigating a large subglacial lake drainage in East Antarctica with ice-penetrating radar" @default.
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