The use of autonomous underwater vehicles to map the variability of under-ice topography |
| |
| Authors: | Peter Wadhams |
| |
| Institution: | (1) Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, UK |
| |
| Abstract: | We review the development of autonomous underwater vehicle (AUV) use under sea ice to map the three-dimensional (3-D) structure
of the ice underside. The author, after extensive experience in under-ice profiling from submarines using single-beam sonar,
carried out the first under-ice sidescan sonar profiling from an AUV in 2002 in the Greenland Sea. This was followed in August
2004 by the first full multibeam sonar experiment, using Kongsberg EM2000 sonar aboard the Autosub-II vehicle off NE Greenland.
Two experiments using a small Gavia vehicle deployed through holes in the ice followed in 2007 and 2008, in the Beaufort Sea
and off Ellesmere Island. Examples of the 3-D imagery are shown, and the two approaches of using a large vehicle deployed
from a ship and a small through-ice vehicle are compared and found to be complementary. The imagery has shown that although
first-year (FY) ridges have the familiar shape of a triangular prism made of small ice blocks, multi-year (MY) ridges are
found to be broken up by lead formation into a chain of individual large ice blocks rather than a coherent linear feature.
New work and future plans are described. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
