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TheBrunt Ice Shelf borders theAntarctic coast ofCoats Land betweenDawson-Lambton Glacier andStancomb-Wills Glacier Tongue. It was named by theUK Antarctic Place-names Committee afterDavid Brunt, British meteorologist, Physical Secretary of theRoyal Society, 1948–57, who was responsible for the initiation of the Royal Society Expedition to this ice shelf in 1955.
It was the location of the base of the Royal Society Expedition, 1955–59 which was taken over as theBritishHalley Research Station.[1]
TheBrunt Icefalls (75°55′S25°0′W / 75.917°S 25.000°W /-75.917; -25.000) extend alongCaird Coast for about 80 kilometres (50 mi), where the steep ice-covered coast descends to Brunt Ice Shelf. The icefalls were discovered on 5 November 1967, in the course of aUnited States Navy SquadronVXE-6 flight over the coast inLC-130 aircraft, and was plotted by theUnited States Geological Survey from air photos obtained at that time. It was named by theAdvisory Committee on Antarctic Names in association with the Brunt Ice Shelf.
In 2012, previously stable large chasms in the ice shelf (cracks which clearly go all the way through to the sea) started expanding,[2] which was expected to cause large parts of the Brunt Ice Shelf to break off within the next few years.[3] On 26 February 2021, the 1,270 km2 (490 sq mi)Iceberg A-74 duly broke away from the north-facing shelf, separating from the edge of the shelf at theMcDonald Ice Rumples along the North Rift and finally joining the Brunt-Stancomb chasm. As of 28 February, A-74 was located at 75° 13' South, 25° 41' West and measures 30 nautical miles (56 km) on its longest axis and 18 nautical miles (33 km) on its widest axis.[4][5]
On 23 January 2023, the second major calving from this area occurred when the crack known as Chasm-1 fully extended through the ice shelf, creating a 1,550 km2 (600 sq mi) iceberg. Chasm-1 had continued to grow since 2015 and by December 2022 extended across the entire ice shelf, marking the beginning of the calving event.[6]
This article incorporatespublic domain material from"Brunt Ice Shelf".Geographic Names Information System.United States Geological Survey.
Media related toBrunt Ice Shelf at Wikimedia Commons75°40′S25°00′W / 75.667°S 25.000°W /-75.667; -25.000
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