Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry

MJ Siegert, AJ Payne, I Joughin

Research output: Contribution to journalArticle (Academic Journal)peer-review

28 Citations (Scopus)
288 Downloads (Pure)

Abstract

It has been shown recently that ice streams are fed by fast-flowing tributaries occupying well-defined subglacial troughs and with shared source areas. Here, ice-penetrating radio-echo sounding (RES) data are analyzed in conjunction with ice surface velocities derived from interferometric synthetic aperture radar (InSAR), to determine the englacial properties of tributaries feeding Ice Stream D, West Antarctica. All of Ice Stream D's tributaries are coincident with "buckled" internal ice-sheet layers, most probably deformed by the processes responsible for enhanced ice flow. Between the tributaries well-preserved internal layers occur. The data reveal that no lateral migration of the ice-stream tributaries has occurred recently. This is consistent with thermomechanical ice-flow modelling, which indicates that the flow of Ice Stream D is controlled by a subglacial trough and is unaffected by changes to the flow of neighbouring Ice Stream C.
Translated title of the contributionSpatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry
Original languageEnglish
Pages (from-to)377 - 382
JournalAnnals of Glaciology
Volume37
Issue number1
DOIs
Publication statusPublished - 1 Jun 2003

Bibliographical note

Rose publication type: Journal article

Sponsorship: Funding for this work was provided by the U.K. Natural Environment Research Council (NERC) Centre for Polar Observation and Modelling

Terms of use: © International Glaciological Society

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