Atmospheric effect

Uploaded on

The atmospheric effect Presentation by nasir abbas golvi

The atmospheric effect Presentation by nasir abbas golvi

More in: Science , Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads


Total Views
On Slideshare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide


  • 2. We will discus about these topics. Condensation And Precipitation.  Air Masses.  Storms.  Atmospheric Pollution.  Climate And Pollution.
  • 3. Atmospheric Effects The lower atmosphere (troposphere) is dynamic, resulting in frequent weather changes The movements and interactions of large air masses bring variations to our weather Large air masses can move thousands of miles and influence a region for a considerable time period
  • 4. Condensation Water droplets do not form randomly, but form around microscopic foreign particles called hygroscopic nuclei present in the air Hygroscopic nuclei may consist of dust, smoke, soot, salt, or other small airborne particles If the proper type/size of airborne particles are not present, condensation may not occur or will be retarded
  • 5. Precipitation  When condensation does occur, the tiny droplets are formed in updrafts and are easily suspended as a cloud  Precipitation requires larger drops to form  Two processes are thought to be responsible for the formation of drops large enough to fall  Coalescence  The Bergeron process
  • 6.  Coalescence – the formation of larger drops by the collision of droplets Coalescence
  • 7. The Bergeron Process  The Bergeron process involves three essential components  Ice crystals in the upper portion of the cloud  Supper cooled vapor in the lower portion of the cloud  Mixing or agitation brings the ice crystals in contact with the supper cooled vapor
  • 8. Types of Precipitation  Precipitation occurs in the form of rain, snow,, hail, or fog
  • 9. Hailstones  If the convection cells in the thunderstorms are powerful enough, hailstones can become quite large
  • 10. Air Masses Air mass – a large body of air that takes on physical characteristics that distinguish it from the surrounding air The main physical characteristics the distinguish an air mass are temperature and moisture content
  • 11. Storms  Storm – an atmospheric disturbance that may develop within a single air mass or may develop along the frontal boundary of air masses  There re different types of storms.  rainstorms, thunderstorms, ice storms, snowstorms, and tornadoes
  • 12. Lightning and Thunder A lightning flash travels at the speed of 300,000 km/s (speed of light) Thunder is a sound and only travels at a speed of approximately 1/3 km/s (1/5 mi/s)
  • 13. Atmospheric Pollution Pollution – any atypical contributions to the environment resulting from the activities of humans Air pollution is primarily the result of products of combustion and industrial processes that are released into the atmosphere Releasing waste gases and particulates into the atmosphere has long been practiced
  • 14. Air Pollution Sources  The major source of air pollution is due to the combustion of fossil fuels – coal, oil, and gas  Increased amounts of CO2 in the atmosphere lead to increased acidity  Pollution and increased acidity of the rain results in statues and other structures undergoing increased/accelerated corrosion
  • 15. Pollution and Climate  It is generally accepted by most scientists that the global climate is also being affected by atmospheric pollution  CO2 and other “greenhouse gases,” particulate emissions, and the resulting global cloud cover all affect the Earth’s also  Scientists are trying to understand climate changes by using various models  Climate models give scientists the opportunity to compare theories and use historical data to study the interrelationships between the Earth’s atmosphere and other factors  .
  • 16. ?