Environment Counts | Antarctic sea-ice may be thicker than previously thought :
Recent advances in autonomous underwater vehicle (AUV) technology have opened up access to the underside of sea-ice. 3D maps of Antarctic sea-ice have been compiled for ten floes using measurements by an autonomous underwater vehicle in the near-coastal regions of the Weddell, Bellingshausen, and Wilkes Land sectors.
The AUV surveys reveal that the floes are much thicker and more deformed than reported by most drilling and ship-based measurements of Antarctic sea ice. This suggests that Antarctic sea ice may be thicker than previously thought. Williams et al, Nature Geoscience, 24 November 2014 doi:10.1038/ngeo2299