Winter stratification - thermal stratification, Biology

Assignment Help:

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.


Related Discussions:- Winter stratification - thermal stratification

Explain the factors on which spoilage of fish depends, Q. Explain the facto...

Q. Explain the factors on which Spoilage of fish depends? i) The type offish. Different types of fish are susceptible to spoilage due to shape and size. A fat fish is suscept

Explain the sponge method, Explain the Sponge Method? In the sponge met...

Explain the Sponge Method? In the sponge method, sterilized sponge with 45 x 5 cm contact surface and free from antimicrobial agent is used. Aseptically, it is moistened with 1

Improvement of soil aeration-aggregate structure, Improvement of Soil Aerat...

Improvement of Soil Aeration Soil organisms greatly improve soil structure and facilitate aeration. Root decay leaves the soil riddled with channels, and the burrowing of worm

What do you understand by tegument, What do you understand by tegument? ...

What do you understand by tegument? Outer covering of parasitic flatworms, including tapeworms and flukes, comprising a syncytial outer layer of cytoplasm connected to cell bod

Cell biology, Explain the functis of the main organelles in plant and anima...

Explain the functis of the main organelles in plant and animal cell as seen under the lightmicroscope

A plant growing on a mountainside, What two abiotic factors might affect (a...

What two abiotic factors might affect (a) an animal living at the bottom of the sea, (b) a plant growing on a mountainside?   (a) The abiotic factors which might

#title.growth hormone., according to the graph,which age is the amount og g...

according to the graph,which age is the amount og growth hormone produced at its highest?

Describe the physiology of atrial septal defect, Describe the Physiology of...

Describe the Physiology of atrial septal defect? In ASD the magnitude of left to right shunt is determined by the size of the defect and the relative compliance of the right ve

Homologous and heterologous portions human sex chromosomes, What are the ho...

What are the homologous and the heterologous portions of the human sex chromosomes? The Homologous portion is that in which there are genes having alleles in both X and Y sex c

Fin Fish, What are five fin fish found in the North-East United States?

What are five fin fish found in the North-East United States?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd