A 1550 square km (963 sq mi.) iceberg, designated A81 broke off Antarctica’s Brunt Ice Shelf. A time-lapse of the 'calving process' was captured by satellites.
00:30An enormous iceberg has carved from Antarctica's brunt ice shelf.
00:52After several years of desperately clinging on, the berg broke away, as confirmed by satellite data.
01:00Scientists estimate the new berg to be around 1,550 square kilometers.
01:07That's the size of Greater London, or five times the size of Malta.
01:14The brunt ice shelf borders the Coatesland coast and the Weddell Sea sector of Antarctica.
01:21Glaciologists have monitored the thick brunt ice shelf for years.
01:28The new berg carved when the crack known as Chasm 1 split northwards, severing the west part of the ice shelf.
01:37It was only a matter of time before it would meet the Halloween crack.
01:41First spotted on, you guessed it, Halloween.
01:45After several years on watch for brunt iceberg carving, we finally witnessed a long-awaited separation of the western brunt ice shelf as iceberg A81.
01:56Routine monitoring from satellites offers unparalleled views of events happening in remote regions.
02:04The Copernicus Sentinel-1 mission carries radar, which returns images regardless of day or night.
02:12This allows us year-round viewing, which is especially important through the long dark winter months.
02:21The British Antarctic Survey's Halley 6 research station, where glaciologists have been monitoring the behaviour of the ice shelf,
02:29was relocated in 2017 to a more secure location after the ice shelf was deemed unsafe.
02:37The station has remained unaffected by the carving event.
02:41There are currently 21 staff working at the station to keep scientific operations running through winter.
02:48It is now around 20 kilometers from the line of rupture.
02:52Thanks to the Copernicus Sentinel satellites,
02:58together with in-situ and airborne measurements made by the British Antarctic Survey,
03:03the safety of the Halley Base has been preserved.
03:07In February 2021, a giant berg broke off from the northern section of Brunt.
03:16Spotted by Sentinel-1, it has already drifted away from the Brunt Ice Shelf into the Weddell Sea.
03:23So, what happens now? The carving of icebergs can speed up the flow of ice from an ice shelf.
03:29If Brunt now experiences an acceleration, it could influence the behaviour of other cracks in the area.
03:36The carving and separation of the latest iceberg, A81, now focuses attention back onto the Halloween crack,
03:44whose extension could contribute to further destabilisation of the remaining eastern portion of the Brunt Ice Shelf.
03:51We will continue using the Copernicus Sentinel satellites to closely monitor the behaviour and stability of the remaining Brunt Ice Shelf.
03:58Contro pleasures and stability of the openings in Brunt so that they are receiving Brunt.
