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Lake Fryxell is a frozen lake 4.5 kilometres (2.8 mi) long, between Canada Glacier and Commonwealth Glaciers at the lower end of Taylor Valley in Victoria Land, Antarctica. It was mapped in the early 1900s and named during Operation Deep Freeze in the 1950s. There are several forms of algae living in the waters[1] and a weather station located at the lake.[2]

Lake Fryxell
Lake Fryxell
Lake Fryxell
Location	Taylor Valley, Victoria Land, Antarctica
Coordinates	77°37′S 163°11′E
Lake type	Endorheic
Primary inflows	Crescent Stream, Harnish Creek
Primary outflows	none
Catchment area	230 km2 (89 sq mi)
Basin countries	(Antarctica)
Max. length	5.8 km (3.6 mi)
Max. width	2.1 km (1.3 mi)
Surface area	7.8 km2 (3.0 sq mi)
Average depth	3.2 m (10 ft)
Max. depth	20 m (66 ft)
Water volume	25.2×10^6 m3 (890×10^6 cu ft)
Surface elevation	18 m (59 ft)
Islands	moraine islands
Settlements	Lake Fryxell Camp, Lake Fryxell Hut

Geography

Lake Fryxell is 20 metres (66 ft) deep, making it so the deepest portion of the lake is below sea level. The lake is dammed by Canada Glacier, making it so that it has no natural outflow. It is covered with about 4.5 metres (15 ft) of ice, but during the summer months, the ice can clear along the shoreline. There are a few small islands as well as several shallow areas.[1][3]

The average annual ablation is between 30 centimetres (12 in) and 40 centimetres (16 in), which is significantly lower when compared to other nearby frozen water bodies, such as the waters adjacent to Ross Island.[4]

Watershed

The watershed contains thirteen streams flowing into the lake, forming a watershed that has an area roughly 230 km² (89 sq mi) in size. Where a few of the streams enter the lake there are well-developed deltas.[1] The streams flow for about 4–12 weeks out of the year. Nearly half of the water flowing into the lake comes from Canada, Lost Seal, and Von Guerard streams.[5]

Climate

Lake Fryxell is located within the McMurdo Dry Valleys, which experience an exceptionally dry climate partially due to katabatic winds descending from the nearby mountains. These winds can exceed 320 km/h (200 mph) under certain conditions and can raise the temperature, melting snow and evaporating water.[6][7] Average precipitation in the area surrounding the valley is equivalent to about 3 cm (1.2 in) of rain a year and a mean annual temperature of −20 °C (−4 °F) with summer temperatures getting above freezing.[5]

Lake Fryxell Camp

Lake Fryxell Camp
Camp
One of the buildings located at the nearby camp.
Lake Fryxell Camp Location of Lake Fryxell Camp in Antarctica
Coordinates: 77°36′21″S 163°07′32″E
Country	United States
Location in Antarctica	Lake Fryxell Taylor Valley Antarctica
Established	1984 (1984)
Type	Seasonal
Status	Operational

Mapped by the British Antarctic Expedition under Robert Falcon Scott, 1910–13, the lake was visited by Professor T.L. Péwé during Operation Deep Freeze, 1957–58, who named it for Dr. Fritiof M. Fryxell, glacial geologist of Augustana College, Illinois.

Lake Fryxell is a focus of scientific research and contains a semi-permanent camp containing four labs and two other buildings. Electricity is generated at the camp using solar panels and a wind turbine. The four labs are used for experimenting with radioactive materials, electronics, chemicals and other materials. When staying at the camp, researchers sleep in tents, some of which are the same style as those used in some Antarctic expeditions in the early 20th century. There is internet and phone access at the camp.[9]

Research activities largely deal with the lake itself and can include scientists diving into the water.[10] The camp has existed since at least 1984.[11]

Ecology

There are multiple forms of algae within the lake, including a sizable population of sulfate-reducing bacteria. Some samples of these bacteria live in very specific areas, such as specific water depths or locations causing them to experience differing physiochemical conditions.[12] There are also a few archaea living in the anoxic zone, that contribute to the methane pockets under 12 m below the surface.[13]

There is a lack of oxygen within Lake Fryxell, which is unique when compared to other lakes in the region because the euphotic zone only extends to 9 metres (30 ft) below the lake surface.[14] This creates an environment similar to the planet about 2.4 billion years ago. Within anoxic areas, scientists have found microbial mats that create small pockets saturated with oxygen.[10][15]

See also

• Andrews Creek
• Coral Ridge
• List of Antarctic field camps
• Lake Washburn (Antarctica)

References

External links

• U.S. Geological Survey Geographic Names Information System: Lake Fryxell

На других языках

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[de] Fryxellsee

Der Fryxellsee (engl. Lake Fryxell) ist ein etwa viereinhalb Kilometer langer meromiktischer See zwischen dem Kanada- und dem Commonwealth-Gletscher in Viktorialand im Osten des antarktischen Kontinents. Er befindet sich im Taylor Valley der Antarktischen Trockentäler. Der Fryxellsee wurde von der Terra-Nova-Expedition (1910 bis 1913) unter Sir Robert Falcon Scott entdeckt und kartografiert und im Jahre 1957 nach Fritiof M. Fryxell (1900–1986), einem Glazialgeologen des Augustana College in Illinois (USA), benannt.

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- [en] Lake Fryxell

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[es] Lago Fryxell

El lago Fryxell es un lago de 4,5 kilómetros de largo, entre el glaciar Canadá y el glaciar Commonwealth, en el valle Taylor, localizado en la Tierra de Victoria, Antártida. La mayor parte del tiempo la superficie del agua está congelada, en forma de hielo azul pues en la parte superior se localiza el agua dulce, mientras que en la parte profunda hay agua salada, con una composición similar a la del agua de mar. A profundidades por debajo de 9,5 m hay elevadas concentraciones de metano y de sulfuro de hidrógeno. La temperatura del agua en verano oscila entre 0,5 y 2,5 °C.

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[fr] Lac Fryxell

Le lac Fryxell est un lac d'Antarctique situé en terre Victoria, dans la chaîne Transantarctique.

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[ru] Фрикселл

Фрикселл — бессточное озеро в районе Земли Виктории, Антарктида. Расположено в долине Тейлора Трансантарктического хребта между ледником Канада и ледником Содружества. Длина озера составляет 4,5 км[источник не указан 936 дней], площадь — 7 км²[1]. Располагается на высоте 15 м над уровнем моря[источник не указан 936 дней], имеет глубину 19,2 м[1].

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