Russell Glacier (Greenland)
| Russell Glacier | |
|---|---|
 Russell Glacier: the fresh meltwater outflow and remains of berg bombardment | |
  Location within Greenland | |
| Location | Isunngua, Qeqqata, Greenland |
| Coordinates | 67°05′45″N 50°13′00″W / 67.09583°N 50.21667°W |
| Terminus | Akuliarusiarsuup Kuua |
Russell Glacier (Template:Lang-da) is a glacier in the Qeqqata municipality in central-western Greenland. It flows from the Greenland ice sheet (Template:Lang-kl) in the western direction. The front of the glacier is located 25 km (16 mi) east of Kangerlussuaq. It is active, advancing 25 m (82 ft) every year,[1] and due to easy approach it remains a popular tourist target.
Geography
The ice sheet outflow ending in Russell Glacier is bounded from the north by the tundra highland of Isunngua and from the south by an exposed, barren, flattened ridge of Akuliarusiarsuk. Several meltwater outflow streams from the base of the glacier form the Akuliarusiarsuup Kuua river, which flows west-south-west towards Kangerlussuaq. The sandur basin of the outflow river forming the valley of the same name (Template:Lang-da) is very shallow; shallow enough to form quicksand fields several kilometers long.[2]
Directly to the west of the glacier is a large lake, the 2x10km[2] Aajuitsup Tasia. Due to minimal height differential, its waters are not conjoint with the meltwater outflow lake immediately to the west of Russell Glacier.
A sibling, unnamed glacier approximately 7 km (4.3 mi) to the southeast of Russell Glacier is the source to the wide outflow meltwater river of Qinnguata Kuussua. The confluence of the latter and the Akuliarusiarsuup Kuua river flowing from Russell Glacier is located at the eastern outskirts of the Kangerlussuaq settlement near the end of Kangerlussuaq Fjord, and used to be known as Watson River.
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Methane cycling below the glacier
A 2014 study found based on subglacial drainage samples (dominated by Proteobacteria), evidence for methane cycling below the ice sheet of the Russell Glacier. During the study, on 12 July 2012 the most widespread surface melt on record for the past 120 years was observed in Greenland, unfrozen water was present on almost the entire ice sheet surface (98.6%). The findings indicate that methanotrophs could serve as a biological methane sink in the subglacial ecosystem, and the region was at least during the sample time, a source of atmospheric methane. Scaled dissolved methane flux during the 4 months of the summer melt season was estimated at 990 Mg CH4. Because the Russell-Leverett Glacier is representative of similar Greenland outlet glaciers, the researchers concluded that the Greenland Ice Sheet may represent a significant global methane source.[3]
See also
References
- ^ O'Carroll, Etain (2005). Greenland and the Arctic. Lonely Planet. p. 167. ISBN 1-74059-095-3.
- ^ a b Vandrekort Vestgrønland: Kangerlussuaq (Map) (1996 ed.). Cartography by Compukort, Denmark. Greenland Tourism a/s.
- ^ "Molecular and biogeochemical evidence for methane cycling beneath the western margin of the Greenland Ice Sheet". The ISME Journal. 8: 2305–2316. 2014. doi:10.1038/ismej.2014.59. PMC 4992074.
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External links
Media related to Russell Glacier at Wikimedia Commons
