Summer stratification - thermal stratification, Biology

Assignment Help:

Summer Stratification - Thermal stratification

Thermal stratification is fairly pronounced during the summer seasons in most lakes of the temperate (cold) regions but is rare in lakes of tropical (hot) and subtropical regions where it occurs only in very deep lakes. This is so, because the rate of mixing of layers is very fast in case of tropical lakes whereas, the temperate lakes retain well defined layers showing different temperature. These layers do not mix rapidly. Therefore the temperate lakes exhibit clear stratification with respect to temperature. Let us understand how thermal stratification develops in water bodies and why it is maximum during the summer seasons.

In lakes the top one metre of the water surface directly absorbs around 90 per cent of the total solar radiation falling on it and is considerably more heated in the process. Consequently, the lower sub-surface layers receive progressively less radiation and remain relatively cool. Thus, the lake becomes thermally stratified, with its water forming layers due to temperature differences or thermal gradients. Thermal stratification is maximum during the summer season, primarily due to two reasons. Firstly, due to the fact that solar intensity increases during this period and it heats the surface layer greatly while the lower layers remain comparatively cool. Secondly, the thermally stratified layers offer resistance to mixing by wind. The fairly pronounced stratification of lakes developed in summer is called summer stratification or stagnation.


Related Discussions:- Summer stratification - thermal stratification

Explain procedure for the use of light microscope, Explain Procedure for th...

Explain Procedure for the use of Light Microscope? Now carry out the exercise following the steps enumerated herewith. 1. Place the microscopic slide with any specimen on th

Horse diseases-horse-pox, Horse-pox Horse pox is a benign disease chara...

Horse-pox Horse pox is a benign disease characterized by the typical pox lesions on the lower limbs or around the muzzle and buccal mucosa. This is a rare disease, caused by a

Enumerate in detail about the cytoskeleton, Enumerate in detail about the C...

Enumerate in detail about the Cytoskeleton All eukaryotic cells have distinct shapes, and are also capable of assuming different shapes. 'The internal organelles of a cell are

Natality - population parameters and regulation, Natality - Population Para...

Natality - Population Parameters and Regulation Natality is the ability of a population to increase. Natality rate is equivalent to birth rate which means the production of ne

Explain about the light sense, Explain about the Light sense You  must ...

Explain about the Light sense You  must be  aware that when you  enter  into a cinema hall, you  are unable  to  see  and  find  out your  seat  initially for  a few minutes; b

Explain about the probiotics, Explain about the Probiotics? A mono or m...

Explain about the Probiotics? A mono or mixed culture of living organisms, which when ingested in certain amounts, has a positive impact on host health, beyond conventional nut

Vasodilatation from the time of injury, The blood vessels surrounding an ac...

The blood vessels surrounding an acutely inflamed site usually represent progressive vasodilatation from the time of injury.

Female reproductive system - external genitalia, EXTERNAL GENITALIA - ...

EXTERNAL GENITALIA - Vestibule is covered by 2 pairs of lips labia majoris and labia minoris. At the anterior junction of labia minoris a small erectile clitoris presen

Describe about mitochondria and how they are associated with, Mitochondria,...

Mitochondria, which fuel life's processes in all cells, uses nutrients from digested food and oxygen which has diffused across cell surface. In freshwater protozoans water expulsio

Why pulses are important for human - nutritional factor, Why Pulses are imp...

Why Pulses are important for human - nutritional factor? Pulses are rich sources of proteins (20-25 g/100 g), the limiting amino acid being methioniize. However, protein quality

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