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dimictic

dimictic Applied to a lake in which two seasonal periods of free circulation occur, as is typical of lakes in mid-latitude climates. In summer, thermal stratification occurs as surface waters are warmed and cease to mix with the denser, colder, deep waters. In winter, when they cool to below 4°C, surface waters expand, so becoming less dense than warmer waters beneath them, giving a reverse stratification. Free circulation through the depth of the lake is possible only in spring, when the surface temperature rises to above 4°C, and the water becomes heavier than that beneath and so sinks and mixes, and in autumn, when the surface (epilimnion) waters cool to the temperature of the deep (hypolimnion) waters.

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dimictic

dimictic Applied to a lake in which two seasonal periods of free circulation occur, as is typical of lakes in mid-latitude climates. In summer, thermal stratification occurs as surface waters are warmed and cease to mix with the denser, colder, deep waters. In winter, when they cool to below 4°C, surface waters expand, so becoming less dense than warmer waters beneath them, giving a reverse stratification. Free circulation through the depth of the lake is possible only in spring, when the surface temperature rises to above 4°C, and the water becomes heavier than that beneath and so sinks and mixes, and in autumn, when the surface (epilimnion) waters cool to the temperature of the deep (hypolimnion) waters.

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"dimictic." A Dictionary of Plant Sciences. . Encyclopedia.com. 19 Feb. 2018 <http://www.encyclopedia.com>.

"dimictic." A Dictionary of Plant Sciences. . Encyclopedia.com. (February 19, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimictic-0

"dimictic." A Dictionary of Plant Sciences. . Retrieved February 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimictic-0

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