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
Q. What is Community and Workplace Interventions? Community Based Interventions Involves health education regarding benefits of physical activities, dietary changes, includi

What is Combination therapy Combination therapy - Use of combination therapy for treatment of immunosuppressed patients with invasive aspergillosis (IA), which has a high morbi

osmoregulation in non chordates

Explain the Types of surgery ? Primary repair of ventricular septal defect has to be done whenever possible. III complex malformations associated with large VSD, pulmonary arte

Osteomalacia Similar to rickets in young growing animals, osteomalacia is a disease of mature animals caused by absolute or relative deficiency of any one or combination of cal


Q How does the presence of exoskeleton describe the general small size of arthropods? Since they have periodic ecdysis and exoskeleton, the growth of arthropods is limited to a

Biological Oxygen Demand - Effect on Water Bodies Addition of biodegradable matter exerts demand on oxygen of the water body. The demand of oxygen is directly related to incre

Ecotone - Nature and Structure of Community The zone of vegetation separating two different types of communities is called ecotone. It is also known as a transition zone. The

Starch It is a plant polysaccharide synthesized by  the plant by photosynthesis and stored mainly  in  grains,  legumes,  roots  and  tubers.  Its molecular formula is (C 6 H 1