- Filchner-Ronne Ice Shelf
The Filchner-Ronne ice shelf is in
Antarcticabordering the Weddell Sea.
The seaward side of the Filchner-Ronne
ice shelfis divided into Eastern (Filchner) and the larger Western (Ronne) sections by Berkner Island. The whole ice shelf covers some 430,000 km², making it the second largest ice shelf in Antarctica, after the Ross Ice Shelf. It grows perpetually due to a flow of inland ice sheets. From time to time, when the shearing stresses exceed the strength of the ice, cracks form and large parts of the ice sheet separate from the ice shelf and continue as icebergs. This is known as "calving".
The Filchner ice shelf is nourished primarily by the
Slessor Glacier, the Recovery Glacier, and the Support Force Glacier, all located east of Berkner Island. The east part of this shelf was discovered in January-February 1912 by the German Antarctic Expeditionunder Wilhelm Filchner. Filchner named the feature for Kaiser Wilhelm, but the Emperor requested it be named for its discoverer.
The Ronne ice shelf is the larger and western part of the Filchner-Ronne ice shelf. It is bounded on the west by the base of the
Antarctic Peninsulaand Ellsworth Land. Commander Finn Ronne, USNR, leader of the Ronne Antarctic Research Expedition(RARE) in 1947-48, discovered and photographed a strip along the entire northern portion of this ice shelf in two aircraft flights in November and December 1947. He named it the "Lassiter Shelf Ice" and gave the name "Edith Ronne Land" to the land presumed to lie south of it. In 1957-58, the US-IGY party at Ellsworth Station, under now Captain Ronne, determined that the ice shelf was larger than previously charted, that it extends southward to preempt most of "Edith Ronne Land." Inasmuch as Capt. James Lassiter's name has been assigned to a coast of Palmer Land, the Advisory Committee on Antarctic Names(US-ACAN) approved the name Ronne Ice Shelffor this large ice shelf, on the basis of first sighting and exploration of the ice shelf by Ronne and parties under his leadership. The shelf is therefore named for Edith Ronne, the wife of Finn Ronne.
1998, the iceberg A-38 broke off the Filchner-Ronne ice shelf. It had a size of roughly 150 by 50 km and was thus larger than Delaware. It later broke up into three parts. A similar-sized calving in May 2000 created an iceberg 167 by 32 km in extent, dubbed A-43 - the disintegration of this is thought to have been responsible for the November 2006sighting of several large icebergs from the coast of the South Islandof New Zealand, the first time that any icebergs had been observed from the New Zealand mainland since 1931. A large group of small icebergs (the largest some 1000 metres in length), were seen off the southeast coast of the island, with one of them drifting close enough to shore to be visible from the hills above the city of Dunedin. If these were indeed the remnants of this calving, then over the course of five and a half years they had travelled slowly north and also east around over half the globe, a journey of some 13,500 km. [http://www.niwascience.co.nz/pubs/mr/archive/2006-11-07-1/ NIWA report] ]
The ice of the Filchner-Ronne ice shelf can be as thick as 600 m; the water below is about 1400 m deep at the deepest point.
The Filchner-Ronne ice shelf is also known as the Ronne-Filchner ice shelf but the form Filchner-Ronne appears to be more popular.
List of glaciers
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Ronne Ice Shelf — /roh neuh/ an ice barrier in Antarctica, in SW Weddell Sea, bordered by Ellsworth Land on the NW and Berkner Island on the E. [named after Finn Ronne, 1899 1980, U.S. explorer] * * * ▪ Antarctica large body of floating ice, lying at the… … Universalium
Ice shelf — An ice shelf is a thick, floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. Ice shelves are found in Antarctica, Greenland and Canada only. The boundary between the floating ice… … Wikipedia
Filchner Ice Shelf — /filk neuhr, filkh / an ice barrier in Antarctica, in the SE Weddell Sea, bordered on the W by Berkner Island. * * * ▪ geological feature, Antarctica large body of floating ice, lying at the head of the Weddell Sea, which is itself an… … Universalium
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Ice shelf — Barrière de glace Principales barrières de glace de l Antarctique Barrière de Ross (472 960 km²) … Wikipédia en Français
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Wilhelm Filchner — Infobox Scientist |name =Wilhelm Filchner box width = image width =220px caption = birth date =September 13, 1877 birth place = death date =May 7, 1957 death place = residence = citizenship =German nationality = ethnicity = field = work… … Wikipedia
Tierra de Edith Ronne — Localizacion de la Tierra de Edith Ronne. La Tierra de Edith Ronne es la porción de la costa sur del mar de Weddell sobre la barrera de hielo Filchner Ronne. El extremo oeste de la Tierra de Edith Ronne es el punto de entrada sur a la ensenada… … Wikipedia Español