Winter stratification - thermal stratification, Biology

Winter Stratification - Thermal stratification

During extremes of winter the surface layer of the lake freezes or attains a temperature close to 0° Celsius. Under these conditions an inverse stratification develops. The water beneath the ice absorbs solar radiation passing through the ice and so remains relatively warm. When this warm water attains a temperature of 4°C it becomes dense and heavier. Consequently it sinks to the bottom where it mixes with bottom water of the lake which is warmed by heat conducted from the bottom mud. The result is higher temperature at the bottom, though the overall stability of water remains undisturbed.

That is, the less dense-surface water in the form of ice or at 0°C floats on the top of the warm, heavier water which is at an appropriate temperature of 4°C. Both of these layers remain stratified and do not mix during the winter season so that the lake is said to have undergone, winter stagnation or stratification.

Posted Date: 1/19/2013 4:35:05 AM | Location : United States







Related Discussions:- Winter stratification - thermal stratification, Assignment Help, Ask Question on Winter stratification - thermal stratification, Get Answer, Expert's Help, Winter stratification - thermal stratification Discussions

Write discussion on Winter stratification - thermal stratification
Your posts are moderated
Related Questions
tertiary structure of protein

drawandlabelthemajorendocrineglandsofthehumanbody

Major role in contributing towards motivation. Psychological factors: Depression, anxiety or phobia induced by illness,  life- style changes or medication effects, may hinder

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Two gene loci, A and B, assort independently, and alleles A and B are dominant over alleles a and b. Indicate the probability of producing: An aB phenotype from a cross AaBb x AaBB

Carpentier -Edwards Valve (C-E) :  This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Glut

The transport system in earthworm The scientific name of earthworm is megascolex. It consists of hearts, blood vessel and blood. There are 8 pairs of hearts in the earthw

Determine sequence weights for the sequences ACTA, ACTT, CGTT, and AGAT by using Thompson, Higgins, and Gibson method

L iq uid manure handling This involves use of lot of water to flush the manure in to collection tank. Storage capacity depends on type of farm, irrigation facility, storage t

1. Describe how the hypothalamus regulates the secretion of anterior pituitary hormones and identify all of the individual hypothalamic regulatory factors. Describe how the hypotha