The calving event of the Drygalski Ice Tongue of February 2005

The Drygalski Ice Tongue (DIT) is the seaward extension of David Glacier, the largest outlet glacier in Victoria Land, east Antarctica. DIT marks the southern border of Terra Nova Bay and plays a decisive role in the development of Terra Nova Bay polynya. A sketch map of the area around Terra Nova Bay. DIT is a major 'landmark' in any (cloud-free) satellite image of the Ross Sea, allowing an immediate recognition of the area of Terra Nova Bay. As measured from an Advanced Synthetic Aperture Radar (ASAR) wide swath (WS) image of Terra Nova Bay of January 2005, the DIT was 96 km long and its width was 22.5 km at 50 km from the coast and 14.1 km across at the snout; these three figures compare with those of a US Geological Survey (USGS) map of 1956 which were 110, 22 and 13 km, respectively.