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Stucture of atmoshere

Stucture of atmoshere

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Stucture of atmoshere

  1. 1. Terms • Atmosphere-The gases, droplets, and particles surrounding Earth’s surface. • Weather-Day to Day conditions of the atmosphere. • Climate-The statistical properties of the atmosphere, including measures of average conditions, variability, etc. • Climatology-The study of long term atmospheric conditions.
  2. 2. FACT -The total mass of the atmosphere is equivelant to 5.65 billion million tons.
  3. 3. Levels of atmosphere • Troposphere • Stratosphere • Mesosphere • Thermosphere • Exosphere
  4. 4. Vertical Structure • Troposphere- • Lowest layer of the atmosphere. Where almost all weather and organisms take place. Decreasing temperatures. Depth= 8 to 16km(3.6 to 10 miles). • It contains 70% of all mass of atmosphere. The density of troposphere is decreases with altitude. This decreases of temperature with altitude is known as Lapse rate.
  5. 5. Vertical Structure CONT. • Stratosphere- • Second lowest layer of atmosphere. It extend about 50-55 km above the surface of the earth. • Ozone layer is found at around 20 km from ground is called Ozonosphere and act as a protective layer against harmful ultraviolet radiations. • Temperature increases with altitude.(positive lapse rate)
  6. 6. Vertical Structure CONT. • Mesosphere- • Third layer in the atmosphere. Decreasing temperature with altitude(negative lapse rate). Depth=Approx. 80km(50 miles). • This layer is very special as all sound waves as well as short radio waves coming from earth re reflected from this layer.
  7. 7. Vertical Structure CONT. • Thermosphere- • The upper layer from mesosphere in atmosphere. Increasing temperature with altitude. Depth=Begins at 80km to 500km. • Ionisation of elements like oxygen and nitric oxide take place in the upper most portion of sphere is called the Ionosphere.
  8. 8. Vertical Structure CONT. • Exosphere- • The upper most layer of the atmosphere is known as exosphere. It extend up to a height of 1600km from the surface of earth. • The temperature of this layer is more than 1200 °C is Found.
  9. 9. ADDITIONS • Tropopause- • The tropopause is the boundary in the Earth's atmosphere between troposphere and stratosphere. Transition zone where the temperature ceases to decrease. • Stratopause- • Top of stratosphere, the temperature increases with altitude, and the stratopause is the region where a maximum in the temperature occurs.
  10. 10. ADDITIONS CONT. • Mesopause- • The mesopause is the boundary between the mesosphere and the thermosphere. Due to the lack of solar heating and very strong radioactive cooling from carbon dioxide, the mesosphere is the coldest region on Earth with temperatures as low as -100 °C.
  11. 11. http://burro.cwru.edu/Academics/Astr201/Atmosphere/structure.jpg
  12. 12. Relevant Terms • Homosphere- • The lowest 80km of the atmosphere, which the relative abundance of the permanent gases is constant. • Heterosphere- • The high atmosphere where gases are not well mixed but rather are stratified according to weight. Where lighter weighing gases are found.
  13. 13. The End

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