Pobeda Ice Island
- 64.6598.9Koordinaten: 64 ° 39 ' S, 98 ° 54 ' E
Pobeda, original Russian name остров Победы ( остров = island, Победа = Win ), hence Pobeda - ice island or Pobeda Island, is an iceberg that periodically before the Queen Mary Coast and 160 km from the upstream Shackleton Ice Shelf in the area of Australian Antarctic territory runs aground. The name of the island is geographically incorrect for this structure.
Periodic emergence
Pobeda arises periodically and disappear. It is created by the calving of an iceberg panel from Denman Glacier, which flows on the eastern side of Shackleton Ice Shelf, then drives to the northwest and runs on a submarine bank on reason. The iceberg sits there firmly for a decade or more, until its thickness has decreased so far that it breaks away from the shoal again and further out drives in the open sea, where he finally breaks apart and melts.
The floating glacier tongue of Denman Glacier pushes through subsequently flowing ice from the ice of East Antarctica into the sea, until a new tabular iceberg of similar size calves, what happens every 40 to 50 years.
A similar phenomenon was observed at the Thwaites Glacier at the Walgreen Coast, Marie Byrd Land.
Data
In Pobeda is a tabular iceberg with almost vertical edges and an almost flat surface, making a name as an island misleading. The property extends at least 27 meters from the sea.
Pobeda is up to 70 km long and 36 km wide, and occupies an area of around 1,500 km ².
History
At the point the first time an iceberg was sighted in February 1840 by the United States Exploring Expedition, which was led by Charles Wilkes. He blocked the way to the west along the Antarctic coast. Therefore Wilkes called the object Termination country.
Pobeda was back in the years 1911 to 1913 found the first Australian Antarctic Expedition under Douglas Mawson (and then Termination Ice Tongue called ), but not during the guided also by BANZARE Mawson expedition 1929 until 1931.
The iceberg was back in 1960, when a Soviet expedition called him Pobeda Island. The Soviet Union held on Pobeda from May 9 to August 12, 1960 weather station at an altitude of 27 meters above sea level, with the help of the structure of the ice was investigated. This iceberg disappeared in the 1970s.
1985 calved a new tabular iceberg, which existed until 2003 or 2004. A neoplasm is earlier than expected after the previously observed periodicity around the year 2025.
Deep groove
Approximately 200 km north of Podeba iceberg is a deep groove, which received in 1956 by AP Lizitsin the name Pobeda Trench (English Pobeda Canyon ). It extends from 62 ° 30 ' S, 100 ° 15' O 62.5100.25 to 64 ° 30 ' S, 97 ° 35' O 64.597.583333333333.