Flow of Rutford Ice Stream and comparison with Carlson Inlet, Antarctica

Frolich, R.M.; Vaughan, David G. ORCID: https://orcid.org/0000-0002-9065-0570; Doake, C.S.M.. 1989 Flow of Rutford Ice Stream and comparison with Carlson Inlet, Antarctica. Annals of Glaciology, 12. 51-56. 10.3189/S0260305500006959

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Official URL: http://dx.doi.org/10.3189/S0260305500006959

Abstract/Summary

Results from movement surveys on Rutford Ice Stream are presented with complementary surface-elevation and ice-thickness measurements. Surface velocities of 300 m a−1 occur at least 130 km up-stream of the grounding line and contrast strongly with the neighbouring Carlson Inlet, where a velocity of 7 m a−1 has been measured. This contrast in velocity is not topographically controlled but appears to be due instead to differences in basal conditions, with Carlson Inlet probably being frozen to its bed. Concentration of lateral shear close to the margins and surface expression of subglacial topography both support a view of significant basal shear stresses in the central part of Rutford Ice Stream. The pattern of principal strain-rate trajectories shows a small number of characteristic features which can be compared with results from future modelling of the glacier's flow.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.3189/S0260305500006959
ISSN:	0260-3055
Date made live:	16 Oct 2018 13:14 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/521235

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.3189/S0260305500006959

ISSN:

0260-3055

Date made live:

16 Oct 2018 13:14 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/521235