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A new view of the underside of Arctic sea ice

Wadhams, P.; Wilkinson, J.P.; McPhail, S.D.. 2006 A new view of the underside of Arctic sea ice. Geophysical Research Letters, 33 (4). L04501. https://doi.org/10.1029/2005GL025131

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Abstract/Summary

The Autosub-II autonomous underwater vehicle (AUV), operating off NE Greenland in August 2004, obtained the first successful swath sonar measurements under sea ice, showing in unprecedented detail the three-dimensional nature of the under-ice surface. The vehicle, operated from RRS James Clark Ross, obtained more than 450 track-km of under-ice multibeam data. We show imagery from first- and multiyear ice, including young ridges, old hummocks and undeformed melting ice. In addition, we show how the combination of other on-board sensors enabled the vehicle to obtain detailed information about seabed topography, water structure and current fields in an exploratory mode within a region which is seldom visited because of difficult year-round ice conditions. This included identification of a new current regime in the Norske Trough.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1029/2005GL025131
ISSN: 0094-8276
Date made live: 19 Feb 2007 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/144203

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