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Article Dans Une Revue Geophysical Research Letters Année : 2006

A new view of the underside of Arctic sea ice

Jp Wilkinson
  • Fonction : Auteur
Sd Mcphail
  • Fonction : Auteur

Résumé

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.

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Océanographie
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Dates et versions

hal-03494192 , version 1 (19-12-2021)

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P Wadhams, Jp Wilkinson, Sd Mcphail. A new view of the underside of Arctic sea ice. Geophysical Research Letters, 2006, 33 (4), ⟨10.1029/2005GL025131⟩. ⟨hal-03494192⟩
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