Roosevelt Island
| Roosevelt Island | ||
|---|---|---|
 |
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| Waters | Ross Sea | |
| Geographical location | 79 ° 19 ′ S , 162 ° 2 ′ W | |
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| length | 150 km | |
| width | 70 km | |
| surface | 7th 500 km² | |
| Highest elevation | 550 m | |
The Roosevelt Island (English Roosevelt Island , also Roosevelt Ice Rise ) is an ice dome in the Antarctic . It is located in the Ross Ice Shelf , the southern, permanently frozen part of the Ross Sea and is completely glaciated. Its northern tip is only five kilometers from the former Bay of the Whales (ice shelf edge), where the US stations Little America stood. The Roosevelt Island has an area of about 7500 km² (more than twice the size of Mallorca ). The ice over the central ridge reaches a maximum height of 550 meters. Contrary to its name, Roosevelt Island is not an island as the land is about 200 meters below sea level.
Its discoverer Richard E. Byrd named it in 1934 after the then incumbent US President Franklin D. Roosevelt . The diary entries of the geologist Raymond Priestley suggest that the ice dome was already seen as a land mass during the Nimrod Expedition (1907-1909) under Ernest Shackleton , but was not identified as a separate land mass.
In the 1960s, the American side built a refuge at 80 ° 11 'S, 161 ° 39' W. and the Margaret Automatic Weather Station at 80 ° 00 'S, 165 ° 00' W (originally Roosevelt Island AWS).
literature
- Beau Riffenburgh: Nimrod . (Translated by Sebastian Vogel). Berlin Verlag, Berlin 2006, ISBN 3-8270-0530-2 .
Individual evidence
- ^ Robert H. Thomas, Douglas R. MacAyeal, Charles R. Bentley, James L. Clapp: The Creep of Ice, Geothermal Heat Flow, and Roosevelt Island, Antarctica . In: Journal of Glaciology. Volume 25, Issue 91, 1980, pp. 47-60. (Published online by Cambridge University Press January 20, 2017)
- ^ R. Drews, K. Matsuoka, C. Martín, D. Callens, N. Bergeot, F. Pattyn: Evolution of Derwael Ice Rise in Dronning Maud Land, Antarctica, over the last millennia . In: Journal of Geophysical Research: Earth Surface, February 24, 2015. ( PDF , p. 565)
- ^ Lionel Favier, Frank Pattyn: ice rise formation, evolution, and stability . In: Geophysical Research Letters, No. 42, June 8, 2015, p. 2.
- ^ John Stewart: Antarctica, Second Edition, 2011, p. 1321
- ^ Ed Waddington, Howard Conway, Nadine Nereson, Tony Gades, Gregg Lamorey, Ken Taylor : What can Ice Core Time Scales and Radar Internal Layers tell us about Past Thickness of the West Antarctic Ice Sheet? . NASA , archived from the original on May 28, 2010 ; accessed on May 11, 2019 (English, original website no longer available).
- ^ Pavel G. Talalay: Mechanical Ice Drilling Technology , p. 236.Springer Verlag / Geological Publishing House, 2016.
- ↑ Riffenburgh, Nimrod , p. 208. Original document cited: Entry in Raymond Priestley's expedition diary of January 24, 1908, SPRI MS 298/1/1.