Ice-Shelf Underwater Morphology

• Published in: Journal of Glaciology
• Main Author: Orheim, Olav
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1979
• Subjects: Earth-Surface Processes; Antarctic; Riiser-Larsenisen; Antarc*; Ice Shelf; Journal of Glaciology
• Online Access: http://dx.doi.org/10.1017/s0022143000014969; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000014969

Abstract A side-scan sonar survey was conducted near the ice front of Riiser-Larsenisen during the 1976–77 Norwegian Antarctic Research Expedition to investigate the underwater ice-shelf morphology. The survey covered several shorter, widely-spaced sections, for a total of about 10 km along the ice front. Only a smaller part of the sections showed a smooth, straight ice front. Most of the observed ice fronts were very rough at the scale of decametres. Projections at around l00 m water depth commonly extended 50–200 m seaward of the above-water ice shelf, and had widths of similar dimensions.