Stratification, Biology

Stratification

On the basis of the variation in air temperature. the atmosphere has been divided vertically into four layers: (figure shown below) thee troposphere, stratospG, mesosphere and thermosphere.

572_stratification.jpg


Troposphere or the lowermost layer extends up to an altitude of 15 km at the equator to 8 km at the poles. The temperature in this zone decreases with increasing altitude or height.

The next layer, the stratosphere, extends up to an altitude of approximately 50 km. Here a gradual increase in temperature occurs with altitude. Pilots of jet aircraft prefer to fly in the stratosphere as it is relatively stable and free from weather fluctuations apart from providing excellent visibility. Scientists are womed about the growing pollution in the stratosphere. As pollutants enter into this zone, they are likely to remain here for a long time. We shall be elaborating this later.

In mesosphere, the next layer, temperature is constant in the lower portion but then rapidly decreases with altitude. At 80 km the temperature is the lowest in the atmosphere (average -90" C). Above this is the thermosphere in which the temperature again increases at higher altitudes. Human activity at present seems to have little direct impact on the outermost atmospheric layer.

 

Posted Date: 12/10/2012 6:55:32 AM | Location : United States







Related Discussions:- Stratification, Assignment Help, Ask Question on Stratification, Get Answer, Expert's Help, Stratification Discussions

Write discussion on Stratification
Your posts are moderated
Related Questions
Benthic Zone - Organisation of the Marine Ecosystem The benthic zone is divisible into sub zones horizontally. These are depicted in a cross section portion of the marine habi

Comparison between Regeneration and Embryonic Development By now you must have realized that the procedures of regeneration and embryonic development have several fundamental

Explain the Control of Air Pollution a. Air belongs to everyone Need it to treat air pollution as public problem   b. Air pollution is an inevitable concomitan

Q. How does the heart impel the blood? The heart is a muscular organ that contains chambers right ventricle and right atrium right ventricle and and left atrium through which b

In general compare and contrast the three functional classifications of joints according to movement. What are two characteristics that make synovial joints unique and different fr

collection of different animals,human being and insects stages of binomial nomenclature

Define Types of Indicators? Macro indicators are used at strategic levels while micro indicators are used at performance levels. From the previous sections it is clear that man

Which of the following is the best definition of the initiation delay that is seen in all organisms? A. Initiation delay is explained as the time it takes for the pre-initiatio

What is dry mass? When biomasses are compared often the method of dry mass is used. The dry mass is the total mass less the water mass of an individual. The total mass is also

Over the past decade, the conceptual understanding of heart failure has changed significantly. Several large clinical trials have demonstrated that non-pharmacological and pharmaco