Salvatnet is a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

Namsos Municipality (Norwegian language, Norwegian) or is a List of municipalities of Norway, municipality in Trøndelag Counties of Norway, county, Norway. It is part of the Namdalen Districts of Norway, region. The administrative centre of the municipality is t ...

Trøndelag Trøndelag (; or is a county and coextensive with the Trøndelag region (also known as ''Midt-Norge'' or ''Midt-Noreg,'' "Mid-Norway") in the central part of Norway. It was created in 1687, then named Trondhjem County (); in 1804 the county was ...

county A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...

. With its deepest depth of , it is Norway's and

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

's second-deepest lake, after

Hornindalsvatnet Hornindalsvatnet is Norway's and Europe's deepest lake, and the world's fourteenth deepest lake, officially measured to a depth of . Its surface lies above sea level, which means that its bottom is below sea level. The village of Grodås li ...

. Alternate sources give the depth as either (old manual method) or (modern echo sounding method) at the deepest point. The lake sits close to the

Norwegian Sea The Norwegian Sea (; ; ) is a marginal sea, grouped with either the Atlantic Ocean or the Arctic Ocean, northwest of Norway between the North Sea and the Greenland Sea, adjoining the Barents Sea to the northeast. In the southwest, it is separate ...

, about above sea level at the surface and reaches to a depth of below sea level. It is a large lake with an area of , a volume of , and a shoreline that is around. Salvatnet is a

meromictic lake A meromictic lake is a lake which has layers of water that do not intermix. In ordinary, holomictic lakes, at least once each year, there is a physical mixing of the surface and the deep waters. The term ''meromictic'' was coined by the Austria ...

, meaning that the water is permanently stratified, often without

oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...

in the lower depths (

bottom water Bottom water is the lowermost water mass in a water body, by its bottom, with distinct characteristics, in terms of physics, chemistry, and ecology. Oceanography Bottom water consists of cold, dense water near the ocean floor. This water is char ...

) due to

density gradient Density gradient is a spatial variation in density over a region. The term is used in the natural sciences to describe varying density of matter, but can apply to any quantity whose density can be measured. Aerodynamics In the study of supersoni ...

and a lack of turnover. A meromictic lake often preserves records of the geologic past. The lower layer of the lake is highly

saline Saline may refer to: Salt-related * Saline (medicine), a liquid with salt content to match the human body * Saline water, non-medicinal salt water * Saline, a historical term (especially American) for a salt works or saltern Places United States ...

and as a result denser than the higher levels of water. Other meromictic lakes in Norway; with old seawater in the lower depths include Botnvatnet, Kilevann, Rossfjordvatnet, Rørholtfjorden an arm of the lake

Tokke Tokke is a List of municipalities of Norway, municipality in Telemark county, Norway. It is located in the Traditional districts of Norway, traditional district of Vest-Telemark. The administrative centre of the municipality is the village of Dal ...

, Rørhopvatnet, Tronstadvann, and

Øvervatnet Øvervatnet is a meromictic lake (containing anoxic seawater at depth of and below) located in Fauske Municipality in Nordland county, Norway. The lake is situated about east of the town of Fauske. Its water is fresh down to depths of . From t ...

References

Namsos Lakes of Trøndelag Meromictic lakes {{Trøndelag-lake-stub

See also

References