Brunt Ice Shelf: Difference between revisions
Chesipiero (talk | contribs) |
GanzKnusper (talk | contribs) Location in Antarctica |
||
| (25 intermediate revisions by 17 users not shown) | |||
| Line 1: | Line 1: | ||
{{Short description|Antarctic ice shelf}} |
|||
{{Use dmy dates|date=April 2022}} |
|||
[[File:Brunt Ice Shelf (6245421670).jpg|thumb|250px|View of Brunt Ice Shelf from the maiden flight of [[Operation IceBridge]]'s Antarctica 2011 campaign with NASA's DC-8]] |
[[File:Brunt Ice Shelf (6245421670).jpg|thumb|250px|View of Brunt Ice Shelf from the maiden flight of [[Operation IceBridge]]'s Antarctica 2011 campaign with NASA's DC-8]] |
||
{{Location map |
|||
| Antarctica |
|||
| lat_deg = 75 |
|||
| lat_min = 40 |
|||
| lat sec = 00 |
|||
| lat_dir = S |
|||
| lon_deg = 25 |
|||
| lon_min = 00 |
|||
| lon sec = 00 |
|||
| lon_dir = W |
|||
| mark = |
|||
| marksize = |
|||
| AlternativeMap = Antarctica relief location map.jpg |
|||
| label = Brunt Ice Shelf |
|||
| position = |
|||
| caption = Location in Antarctica |
|||
}} |
|||
The '''Brunt Ice Shelf''' borders the [[Antarctica|Antarctic]] coast of [[Coats Land]] between [[Dawson-Lambton Glacier]] and [[Stancomb-Wills Glacier Tongue]]. It was named by the [[UK Antarctic Place-names Committee]] after [[David Brunt]], British meteorologist, Physical Secretary of the [[Royal Society]], 1948–57, who was responsible for the initiation of the Royal Society Expedition to this ice shelf in 1955. |
The '''Brunt Ice Shelf''' borders the [[Antarctica|Antarctic]] coast of [[Coats Land]] between [[Dawson-Lambton Glacier]] and [[Stancomb-Wills Glacier Tongue]]. It was named by the [[UK Antarctic Place-names Committee]] after [[David Brunt]], British meteorologist, Physical Secretary of the [[Royal 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 |
It was the location of the base of the Royal Society Expedition, 1955–59 which was taken over as the [[United Kingdom|British]] [[Halley Research Station]].<ref name="Doman">{{cite news |last1=Doman |first1=Mark |title=The making of an iceberg |url=https://www.abc.net.au/news/2019-10-09/formation-of-brunt-ice-shelf-iceberg-in-antarctica-captured/11370748 |accessdate=10 October 2019 |work=ABC News |publisher=[[Australian Broadcasting Corporation]] |date=8 October 2019}}</ref> |
||
The '''Brunt Icefalls''' ({{coord|75|55|S|25|0|W|scale:2000000|display=inline}}) extend along [[Caird Coast]] for about {{convert|80|km}}, where the steep ice-covered coast descends to Brunt Ice Shelf. The icefalls were discovered |
The '''Brunt Icefalls''' ({{coord|75|55|S|25|0|W|scale:2000000|display=inline}}) extend along [[Caird Coast]] for about {{convert|80|km}}, where the steep ice-covered coast descends to Brunt Ice Shelf. The icefalls were discovered on 5 November 1967, in the course of a [[United States Navy]] Squadron [[VXE-6]] flight over the coast in [[LC-130]] aircraft, and was plotted by the [[United States Geological Survey]] from air photos obtained at that time. It was named by the [[Advisory Committee on Antarctic Names]] in association with the Brunt Ice Shelf. |
||
== |
==Calving events== |
||
[[File:Iceberg Brunt Ice Shelf.jpg|thumb|400px|[[Sentinel-2]] satellite imagery shows the before and after the calving in 2023.]] |
|||
'''Refuge Corrientes''' {{coord|75.566667|S|26.6|W|format=dms|region:AQ|display=inline}} is an Antarctic refuge located on the Brunt Ice Shelf, in the [[Caird Coast]] of the [[Weddell Sea]], in the eastern part of the [[Coats Land]]. The refuge, administered by the [[Argentine Army]], was inaugurated on January 10, 1961 and depends on the [[Belgrano II Base]]; it is located close to the [[Halley Research Station]].<ref>{{cite web|url= https://es.wikipedia.org/wiki/Refugio_Corrientes | title = Refugio Corrientes | website = Wikipedia Espanol | publisher = Wikimedia Foundation Inc. |accessdate = September 17, 2018}}</ref> |
|||
In 2012, previously stable large chasms in the ice shelf (cracks which clearly go all the way through to the sea) started expanding,<ref>{{cite web|url=https://www.bas.ac.uk/project/brunt-ice-shelf-movement|title=Brunt Ice Shelf movement}}</ref> which was expected to cause large parts of the Brunt Ice Shelf to break off within the next few years.<ref>{{cite web|url=https://scitechdaily.com/rapidly-accelerating-crack-brunt-ice-shelf-breaking-up-with-antarctica-this-year|title=Rapidly Accelerating Crack: Brunt Ice Shelf Breaking Up With Antarctica This Year?}}</ref> On 26 February 2021, the {{convert|1270|km2|mi2|abbr=on}} [[Iceberg A-74]] duly broke away from the north-facing shelf, separating from the edge of the shelf at the [[McDonald 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 {{convert|30|nmi|km}} on its longest axis and {{convert|18|nmi|km}} on its widest axis.<ref>{{cite web | url=https://www.bas.ac.uk/media-post/brunt-ice-shelf-in-antarctica-calves/ | title=Brunt Ice Shelf in Antarctica calves | date=26 February 2021 | publisher=[[British Antarctic Survey]]}}</ref><ref>{{cite web | url=https://usicecenter.gov/PressRelease/IcebergA74 | title=Iceberg A-74 Calves from the Brunt Ice Shelf in the Weddell Sea | date=1 March 2021 | publisher=U.S. National Ice Center | author=LT Falon M. Essary}}</ref> |
|||
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 {{convert|1550|km2|mi2|abbr=on}} 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.<ref>{{cite web | url=https://www.bas.ac.uk/media-post/brunt-ice-shelf-in-antarctica-calves-giant-iceberg/ | title=Brunt Ice Shelf in Antarctica calves giant iceberg | date=23 January 2023 | publisher=British Antarctic Survey}}</ref> |
|||
==See also== |
==See also== |
||
| Line 21: | Line 44: | ||
==External links== |
==External links== |
||
* {{Commons |
* {{Commons category-inline}} |
||
{{coord|75|40|S|25|00|W|scale:2000000_source:GNIS|display=title}} |
{{coord|75|40|S|25|00|W|scale:2000000_source:GNIS|display=title}} |
||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
{{Antarctic fields camp}} |
{{Antarctic fields camp}} |
||
{{Antarctica}} |
{{Antarctica}} |
||
| ⚫ | |||
| ⚫ | |||
Latest revision as of 12:53, 16 August 2024
The Brunt Ice Shelf borders the Antarctic coast of Coats Land between Dawson-Lambton Glacier and Stancomb-Wills Glacier Tongue. It was named by the UK Antarctic Place-names Committee after David Brunt, British meteorologist, Physical Secretary of the Royal 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 the British Halley Research Station.[1]
The Brunt Icefalls (75°55′S 25°0′W / 75.917°S 25.000°W) extend along Caird 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 a United States Navy Squadron VXE-6 flight over the coast in LC-130 aircraft, and was plotted by the United States Geological Survey from air photos obtained at that time. It was named by the Advisory Committee on Antarctic Names in association with the Brunt Ice Shelf.
Calving events
[edit]
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 the McDonald 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]
See also
[edit]- Brunt Basin
- Emperor Bay
- List of glaciers
- List of Antarctic ice shelves
- List of Antarctic field camps
References
[edit]- ^ Doman, Mark (8 October 2019). "The making of an iceberg". ABC News. Australian Broadcasting Corporation. Retrieved 10 October 2019.
- ^ "Brunt Ice Shelf movement".
- ^ "Rapidly Accelerating Crack: Brunt Ice Shelf Breaking Up With Antarctica This Year?".
- ^ "Brunt Ice Shelf in Antarctica calves". British Antarctic Survey. 26 February 2021.
- ^ LT Falon M. Essary (1 March 2021). "Iceberg A-74 Calves from the Brunt Ice Shelf in the Weddell Sea". U.S. National Ice Center.
- ^ "Brunt Ice Shelf in Antarctica calves giant iceberg". British Antarctic Survey. 23 January 2023.
This article incorporates public domain material from "Brunt Ice Shelf". Geographic Names Information System. United States Geological Survey.
External links
[edit]
Media related to Brunt Ice Shelf at Wikimedia Commons
75°40′S 25°00′W / 75.667°S 25.000°W
 | This Coats Land location article is a stub. You can help Wikipedia by expanding it. |