Hodgson Lake
| Hodgson Lake | ||
|---|---|---|
| Geographical location | Alexander I Island , West Antarctica | |
| Drain | none | |
| Data | ||
| Coordinates | 72 ° 0 '33 " S , 68 ° 27' 43" W | |
|
||
| length | 2 km | |
| width | 1.5 km | |
| Maximum depth | 93.4 m | |
|
particularities |
former subglacial lake |
|
Lake Hodgson is a permanently ice-covered lake on Alexander I Island in Antarctica . It is located south of the Saturn Glacier and southeast of the Citadel Bastion . It is bounded in the southeast by the Corner Cliffs and in the southwest by the Corner Kliffs Glacier . The freshwater lake is 2 km long, 1.5 km wide and 93.4 m deep. It is covered by a 3.6 to 4.0 m thick layer of ice that has isolated it from the outside world for thousands of years. In the last ice age 10,500 years ago, it was a subglacial lake under an ice sheet at least 465 m thick. The lake was only discovered in 2000 by the British paleolimnologist Dominic A. Hodgson (* 1968), after whom the lake has been named since 2007.
In 2013, a drill core from the sediment of Lake Hodgson provided evidence that the lake also harbored life in its subglacial phase.
Web links
- Antarctica: The British find microbes in the sea under the ice for the first time in Spiegel Online on September 10, 2013
- Megan Gannon: Life Found in Mud Beneath Ice-Covered Antarctic Lake in LiveScience on September 10, 2013
Individual evidence
- ↑ a b c d David A. Pearce, Dominic A. Hodgson, Michael AS Thorne, Gavin Burns, Charles S. Cockell: Preliminary Analysis of Life within a Former Subglacial Lake Sediment in Antarctica (PDF; 753 kB). In: Diversity 5, 2013, pp. 680–702 (English), doi : 10.3390 / d5030680
- ^ John Stewart: Antarctica - An Encyclopedia . Vol. 1, McFarland & Co., Jefferson and London 2011, ISBN 978-0-7864-3590-6 , p. 742. (English)