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The internal layering of Pine Island Glacier, West Antarctica, from airborne radar-sounding data

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Nanna Bjørnholt Karlsson
  • David Rippin
  • David Vaughan
  • Hugh Corr
This paper presents an overview of internal layering across Pine Island Glacier, West Antarctica, as measured from airborne-radar data acquired during a survey conducted by the British Antarctic Survey and the University of Texas in the 2004/05 season. Internal layering is classified according to type (continuous/discontinuous/missing) and the results compared with InSAR velocities. Several areas exhibit disruption of internal layers that is most likely caused by large basal shear stresses. Signs of changes in flow were identified in a few inter-tributary areas, but overall the layering classification and distribution of layers indicate that only minor changes in ice-flow regime have taken place. This is supported by bed-topography data that show the main trunk of the glacier, as well as some of the tributaries, are topographically controlled and located in deep basins.
OriginalsprogEngelsk
TidsskriftAnnals of Glaciology
Vol/bind50
Udgave nummer51
Sider (fra-til)141-146
ISSN0260-3055
StatusUdgivet - 2010

ID: 40313547