Roosevelt Island is the second largest ice rise of Antarctica and world-wide, after Berkner Island. Despite its name, it is not an island, since the bedrock below the ice at its highest part is below sea level. It is about 130 km (81 mi) long in a NW-SE direction, 65 km (40 mi) wide and about 7,500 km2 (2,896 sq mi) in area, lying under the eastern part of the Ross Ice ShelfofAntarctica. Its central ridge rises to about 550 m (1,804 ft) above sea level, but this and all other elevations of the ice rise are completely covered by ice, so that it is invisible at ground level.
Examination of how the ice flows above it establishes the existence and extent of the ice rise.[1][2] Radar surveying carried out between 1995 and 2013 showed that the Raymond Effect was operating beneath the ice divide.[2][3]
The ice rise has become a focus of the Roosevelt Island Climate Evolution (RICE) research
[4] using ice coring.[5]
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Talalay, Pavel G. (16 March 2016). "9: Cable-Suspended Electromechanical Drills with Bottom-Hole Circulation". Mechanical Ice Drilling Technology. Springer Geophysics. Singapore: Springer (published 2016). p. 236. ISBN9789811005602. Retrieved 10 November 2016. Roosevelt Island is a coastal ice rise [...] where intermediate-depth ice coring was carried out as part of the Roosevelt Island Climate Evolution (RICE) international project led by New Zealand.
