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

Nanna Bjørnholt Karlsson; David Rippin; David Vaughan; Hugh Corr

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

Nanna Bjørnholt Karlsson, David Rippin, David Vaughan, Hugh Corr

Physics of Ice, Climate and Earth

Abstract

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.

Original language	English
Journal	Annals of Glaciology
Volume	50
Issue number	51
Pages (from-to)	141-146
ISSN	0260-3055
Publication status	Published - 2010

Keywords

Faculty of Science

Access to Document

http://www.igsoc.org/annals/V50/51/t51A047.pdf

Cite this

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

abstract = "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.",

keywords = "Faculty of Science",

author = "Karlsson, {Nanna Bj{\o}rnholt} and David Rippin and David Vaughan and Hugh Corr",

year = "2010",

language = "English",

volume = "50",

pages = "141--146",

journal = "Annals of Glaciology",

issn = "0260-3055",

publisher = "International Glaciological Society",

number = "51",

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TY - JOUR

T1 - The internal layering of Pine Island Glacier, West Antarctica, from airborne radar-sounding data

AU - Karlsson, Nanna Bjørnholt

AU - Rippin, David

AU - Vaughan, David

AU - Corr, Hugh

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

KW - Faculty of Science

M3 - Journal article

SN - 0260-3055

VL - 50

SP - 141

EP - 146

JO - Annals of Glaciology

JF - Annals of Glaciology

IS - 51

ER -