Arm of the Southern Ocean
The Amundsen Sea, an arm of the Southern Ocean off Marie Byrd Land in western Antarctica, lies between Cape Flying Fish (the northwestern tip of Thurston Island) to the east and Cape Dart on Siple Island to the west. Cape Flying Fish marks the boundary between the Amundsen Sea and the Bellingshausen Sea. West of Cape Dart there is no named marginal sea of the Southern Ocean between the Amundsen and Ross Seas. The Norwegian expedition of 19281929 under Captain Nils Larsen named the body of water for the Norwegian polar explorer Roald Amundsen while exploring this area in February 1929.[1]
The sea is mostly ice-covered, and the Thwaites Ice Tongue protrudes into it. The ice sheet which drains into the Amundsen Sea averages about 3km (1.9mi) in thickness; roughly the size of the state of Texas, this area is known as the Amundsen Sea Embayment (ASE); it forms one of the three major ice-drainage basins of the West Antarctic Ice Sheet.
The ice sheet which drains into the Amundsen Sea averages about 3km (1.9mi) in thickness; is roughly the size of the state of Texas and the area is known as the Amundsen Sea Embayment (ASE); it forms one of the three major ice drainage basins of the West Antarctic Ice Sheet, the others being the Ross Sea Embayment and the Weddell Sea Embayment. In March 2007, scientists studying the ASE through satellite and airborne surveys announced a significant thinning of the ASE, due to shifts in wind patterns that allow warmer waters to flow beneath the ice sheet.
Some scientists have proposed that this region may be a "weak underbelly" of the West Antarctic Ice Sheet. The Pine Island and Thwaites Glaciers, which both flow into the Amundsen Sea, are two of Antarctica's largest five. Scientists have found that the flow of these glaciers has increased starting in the mid-2000s decade; if they were to melt completely global sea levels would rise by about 0.91.9m (12yards). Scientist have suggested that the loss of these glaciers would destabilise the entire West Antarctic ice sheet and possibly sections of the East Antarctic Ice Sheet.[2]
A study in October 2004 suggested that because the ice in the Amundsen Sea had been melting rapidly and riven with cracks, the offshore ice shelf was set to collapse "within five years". The study projected a sea level rise of 1.3m (4.3ft) from the West Antarctic Ice Sheet if all the sea ice in the Amundsen Sea melted.[3]
Measurements made by the British Antarctic Survey in 2005 showed that the ice discharge rate into the Amundsen Sea embayment was about 250km3 per year. Assuming a steady rate of discharge, this alone is sufficient to raise global sea levels by 0.2mm per year.[4]
A subglacial volcano has also been detected in the area, just north of the Pine Island Glacier near the Hudson Mountains. It last erupted approximately 2,200 years ago, indicated by widespread ash deposits within the ice, in what was the largest known eruption in Antarctica within the past 10 millennia.[5][6] Volcanic activity in the region may be contributing to the observed increase of glacial flow,[7] although currently the most popular theory amongst the scientists studying this area is that the flow has increased due to warming ocean water.[8][9] This water has warmed due to an upwelling of deep ocean water which is due to variations in pressure systems, which could have been affected by global warming.[10]
In January 2010, a modelling study suggested that the "tipping point" for Pine Island Glacier may have been passed in 1996, with a retreat of 200km possible by 2100, producing a corresponding 24cm (0.79ft) of sea level rise, although it was suggested that these estimates for timespan were conservative.[11] However, the modelling study also states that "Given the complex, three-dimensional nature of the real Pine Island glacier ... it should be clear that the [...] model is a very crude representation of reality."[12]
Pine Island Bay (7450S 10240W / 74.833S 102.667W / -74.833; -102.667) is a bay about 40 miles (64km) long and 30 miles (48km) wide, into which flows the ice of the Pine Island Glacier at the southeast extremity of the Amundsen Sea. It was delineated from aerial photographs taken by USN Operation Highjump in December 1946, and named by the Advisory Committee on Antarctic Names (US-ACAN) for the USS Pine Island, seaplane tender and flagship of the eastern task group of USN Operation Highjump which explored this area.[13]
Russell Bay (7327S 12354W / 73.450S 123.900W / -73.450; -123.900) is a rather open bay in southwestern Amundsen Sea, extending along the north sides of Siple Island, Getz Ice Shelf and Carney Island, from Pranke Island to Cape Gates. It was mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 195966, and named by the Advisory Committee on Antarctic Names (US-ACAN) for Admiral James S. Russell, USN, Vice Chief of Naval Operations during the post 195758 IGY period.[14]
Coordinates: 73S 112W / 73S 112W / -73; -112
See the original post here:
- Court hearing Thursday on Confederate statue removal - Richmond Free Press [Last Updated On: June 24th, 2020] [Originally Added On: June 24th, 2020]
- 102 American Towns Founded Before the American Revolution - 24/7 Wall St. [Last Updated On: July 1st, 2020] [Originally Added On: July 1st, 2020]
- 11 Actresses With The Most Emmy Awards, Ranked | ScreenRant - Screen Rant [Last Updated On: August 26th, 2020] [Originally Added On: August 26th, 2020]
- Grammy Awards 2020: Beyonce Leads, BTS Bags First Ever Nom - Full List of Nominations This Year - India.com [Last Updated On: November 29th, 2020] [Originally Added On: November 29th, 2020]
- Land transactions for the week of Jan. 3, 2021 - Shelby County Reporter - Shelby County Reporter [Last Updated On: January 11th, 2021] [Originally Added On: January 11th, 2021]
- Chapter government officials sworn in during virtual inauguration ceremony - Farmington Daily Times [Last Updated On: January 11th, 2021] [Originally Added On: January 11th, 2021]
- What sold, and for how much, in Marion County - Ocala [Last Updated On: March 21st, 2021] [Originally Added On: March 21st, 2021]
- Richmond's Rage of the Woke - City Journal [Last Updated On: April 13th, 2021] [Originally Added On: April 13th, 2021]
- Land transactions for the week of April 11, 2021 - Shelby County Reporter - Shelby County Reporter [Last Updated On: April 13th, 2021] [Originally Added On: April 13th, 2021]
- Best New Indie: 10 songs you need to discover this week - indie88.com [Last Updated On: April 19th, 2021] [Originally Added On: April 19th, 2021]
- How much did that house go for? Ocala/Marion County deed transfers from May 3-7 - Ocala [Last Updated On: June 9th, 2021] [Originally Added On: June 9th, 2021]
- American Towns Founded Before the American Revolution - 24/7 Wall St. [Last Updated On: July 10th, 2021] [Originally Added On: July 10th, 2021]
- Local Patriots answered call of freedom - Mount Airy News [Last Updated On: July 10th, 2021] [Originally Added On: July 10th, 2021]
- Deeds - The Clanton Advertiser - Clanton Advertiser [Last Updated On: July 10th, 2021] [Originally Added On: July 10th, 2021]
- Sunburn The morning read of what's hot in Florida politics 7.9.21 - Florida Politics [Last Updated On: July 10th, 2021] [Originally Added On: July 10th, 2021]
- Can You Be Addicted to Travel? - Atlas Obscura [Last Updated On: July 27th, 2021] [Originally Added On: July 27th, 2021]
- Can the Antarctic Treaty protect one of the world's last great wildernesses from climate change? - ABC News [Last Updated On: August 20th, 2021] [Originally Added On: August 20th, 2021]
- Sandra Cisneros Loves to Read About Women Waging Battle - The New York Times [Last Updated On: September 8th, 2021] [Originally Added On: September 8th, 2021]
- Sunburn The morning read of what's hot in Florida politics 10.1.21 - Florida Politics [Last Updated On: October 3rd, 2021] [Originally Added On: October 3rd, 2021]
- Geography of Antarctica - Wikipedia [Last Updated On: October 21st, 2021] [Originally Added On: October 21st, 2021]
- Physiocracy - Wikipedia [Last Updated On: November 9th, 2021] [Originally Added On: November 9th, 2021]
- All Songs in Grand Theft Auto: The Trilogy - The Definitive Edition - Nintendo Wire [Last Updated On: November 17th, 2021] [Originally Added On: November 17th, 2021]
- Which songs have been removed from the GTA Remastered Trilogy? - CharlieINTEL.com [Last Updated On: November 17th, 2021] [Originally Added On: November 17th, 2021]
- Twenty One Pilots to bring 2022 tour to PPG Paints Arena - The Times [Last Updated On: November 21st, 2021] [Originally Added On: November 21st, 2021]
- Ukulele Dick and the instrument that conquered the North Pole, at the Morris Museum - Morristown Green [Last Updated On: December 15th, 2021] [Originally Added On: December 15th, 2021]
- North Hills real estate transactions for the week of Dec. 19, 2021 - TribLIVE [Last Updated On: December 19th, 2021] [Originally Added On: December 19th, 2021]
- Land transactions for the month of October - Shelby County Reporter - Shelby County Reporter [Last Updated On: December 22nd, 2021] [Originally Added On: December 22nd, 2021]
- Welcome To The Age Of Instability - Worldcrunch [Last Updated On: February 15th, 2022] [Originally Added On: February 15th, 2022]
- Your right to know: Latest property transfers and building permits - Lynchburg News and Advance [Last Updated On: February 21st, 2022] [Originally Added On: February 21st, 2022]
- Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition | Communications Earth &... [Last Updated On: February 21st, 2022] [Originally Added On: February 21st, 2022]
- University of Wyoming Fall 2021 Honors | In Our Schools | wyomingnews.com - Wyoming Tribune [Last Updated On: March 15th, 2022] [Originally Added On: March 15th, 2022]
- North Hills real estate transactions for the week of March 13, 2022 - TribLIVE [Last Updated On: March 15th, 2022] [Originally Added On: March 15th, 2022]
- Marie Byrd Land - Wikipedia [Last Updated On: March 15th, 2022] [Originally Added On: March 15th, 2022]
- Climber becomes the youngest to scale the Seven Volcanic Summits - UPI News [Last Updated On: May 9th, 2022] [Originally Added On: May 9th, 2022]
- Viral video giving the illusion mini dinosaurs are running leaves the internet confused - Here's what it is - Times Now [Last Updated On: May 9th, 2022] [Originally Added On: May 9th, 2022]
- PopBopRocktilUDrop | From the Land of Band Box Records [Last Updated On: May 9th, 2022] [Originally Added On: May 9th, 2022]
- Land transfers from April 13-19 at Wilkes Register of Deeds office - Wilkes Journal Patriot [Last Updated On: May 25th, 2022] [Originally Added On: May 25th, 2022]
- Land Transfers for May 6 to May 12 - The Suffolk News-Herald - Suffolk News-Herald [Last Updated On: May 25th, 2022] [Originally Added On: May 25th, 2022]
- High spatial and temporal variability in Antarctic ice discharge linked to ice shelf buttressing and bed geometry | Scientific Reports - Nature.com [Last Updated On: June 30th, 2022] [Originally Added On: June 30th, 2022]
- New ideas for Cleveland lakefront land bridge proposed by Green Ribbon Coalition, Big Creek Connects - cleveland.com [Last Updated On: August 23rd, 2022] [Originally Added On: August 23rd, 2022]
- Schedule & Playlists | WFMT [Last Updated On: August 30th, 2022] [Originally Added On: August 30th, 2022]
- Point Nemo: Facts about the Earth's farthest point from land [Last Updated On: August 30th, 2022] [Originally Added On: August 30th, 2022]
- Mount Sidley - Wikipedia [Last Updated On: October 15th, 2022] [Originally Added On: October 15th, 2022]
- Joan Jett - Wikipedia [Last Updated On: October 15th, 2022] [Originally Added On: October 15th, 2022]
- West Antarctic Ice Sheet - Wikipedia [Last Updated On: October 15th, 2022] [Originally Added On: October 15th, 2022]
- NASA Finds Mantle Plume Melting Antarctica From Below [Last Updated On: February 10th, 2023] [Originally Added On: February 10th, 2023]
- Marie Byrd Land Antarctica - Atlas Obscura [Last Updated On: February 10th, 2023] [Originally Added On: February 10th, 2023]