Alexander Island

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Alexander Island
Alexander Island.PNG
Alexander Island shown within Antarctica
Geography
Location Antarctica
Coordinates 71°00′S 70°00′W / 71°S 70°W / -71; -70
Area 49,070 km2 (18,950 sq mi) (28th)
Length 240 mi (390 km)
Width 50 mi (80 km)
Elevation 2,987 m (9,800 ft)
Highest point Mount Stephenson
Country
Antarctica
Demographics
Population 0
Additional information
Administered under the Antarctic Treaty System

Alexander Island, also known as Alexander I Island, Alexander I Land, Alexander Land, Alexander I Archipelago, and Zemlja Alexandra I, is the largest island of Antarctica. It is in the Bellingshausen Sea west of Palmer Land. It is separated from Antarctic Peninsula by Marguerite Bay and George VI Sound. George VI Sound is filled with ice and connects Alexander Island to Palmer Land. The island partly surrounds Wilkins Sound, which is to its west.[1]

Alexander Island is about 240 miles (390 km) long. It is 50 miles (80 km) wide in the north and 150 miles (240 km) wide in the south.[2] Alexander Island is the second largest uninhabited island in the world, Devon Island is the largest.

Alexander Island was discovered on January 28, 1821. It was named for the reigning Tsar Alexander I of Russia. It was believed to be part of the Antarctic mainland until 1940.

A notable feature of Alexander Island is Hodgson Lake. It is a former subglacial lake that has come out from under an ice sheet that covered it. It is 2 km (1.2 mi) long by 1.5 km (0.93 mi). It has a 93.4 m (306 ft) deep water column that is sealed beneath 3.6 to 4.0 m (12 to 13 ft) thick lake ice.[3][4]

References[change | edit source]

  1. Stewart, J. (2011) Antarctic An Encyclopedia McFarland & Company Inc, New York. 1776 pp. ISBN 9780786435906.
  2. U.S. Geological Survey Geographic Names Information System: Alexander Island
  3. Hodgson D.A., S.J. Roberts, M.J. Bentley, J.A. Smith, J.S. Johnson, E. Verleyen, W. Vyverman, A.J. Hodson, M.J. Leng, A. Cziferszky, A.J. Fox, and D.C.W. Sanderson (2009) Exploring former subglacial Hodgson Lake, Antarctica Paper I. Quaternary Science Reviews. 28:23-24:2295–2309.
  4. Hodgson D.A., S.J. Roberts, M.J. Bentley, E.L. Carmichael, J.A. Smith, E. Verleyen, W. Vyverman, P. Geissler, M.J. Leng, and D.C.W. Sanderson (2009) Exploring former subglacial Hodgson Lake, Antarctica Paper II. Quaternary Science Reviews. 28:23-24:2310–2325.