Other
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3304501w&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 4, CiteID L04501
Other
5
Cryosphere: Sea Ice (4540), Cryosphere: Polynas (4540), Oceanography: General: Ocean Acoustics, Oceanography: General: Ocean Observing Systems
Scientific paper
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.
McPhail David S.
Wadhams Peter
Wilkinson Phil J.
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