A new view of the underside of Arctic sea ice
International audience 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 fro...
Published in: | Geophysical Research Letters |
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Main Authors: | , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03494192 https://hal.archives-ouvertes.fr/hal-03494192/document https://hal.archives-ouvertes.fr/hal-03494192/file/Geophysical%20Research%20Letters%20-%202006%20-%20Wadhams%20-%20A%20new%20view%20of%20the%20underside%20of%20Arctic%20sea%20ice.pdf https://doi.org/10.1029/2005GL025131 |
Summary: | International audience 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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