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Kalyan Kumar
   Atmospheric pressure
   Cyclones
   Anticyclones
   Instruments for measuring
   Volcanoes
   Conclusion




                                2012 85 031   2
   Force exerted by the weight of the air above
   Weight of the air at sea level
       14.7 pounds per square inch
       1 kilogram per square centimeter



   Units of measurement
       Millibar (mb) – standard sea level pressure is 1013.2 mb




                                               2012 85 031         3
A center of low pressure
Pressure decreases toward the center
Winds associated with a cyclone




                                       2012 85 031   4
A center of high pressure
Pressure increases toward the center
Winds associated with a cyclone




                                       2012 85 031   5
2012 85 031   6
Barograph
Barometer


             2012 85 031   7
   The outer crust is made of rocks
   Underneath the crust is the mantle
   The gases push these melted rocks called ‘magma’




                                         2012 85 031   8
   A Volcano is a special kind of mountain that builds itself
   There are several thousand volcanoes in the world
   Most of them are extinct
   Some are dormant




                                Arenal, Near Panama, Central America

                                             2012 85 031               9
Prevention of formation of cyclones or volcanoes are not in
the realm of possibility. One of the mitigation measure
against disaster is the efficient warning system.




                                          2012 85 031         10
2012 85 031   11

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Cyclones, anticyclones and volcanoes

  • 2. Atmospheric pressure  Cyclones  Anticyclones  Instruments for measuring  Volcanoes  Conclusion 2012 85 031 2
  • 3. Force exerted by the weight of the air above  Weight of the air at sea level  14.7 pounds per square inch  1 kilogram per square centimeter  Units of measurement  Millibar (mb) – standard sea level pressure is 1013.2 mb 2012 85 031 3
  • 4. A center of low pressure Pressure decreases toward the center Winds associated with a cyclone 2012 85 031 4
  • 5. A center of high pressure Pressure increases toward the center Winds associated with a cyclone 2012 85 031 5
  • 8. The outer crust is made of rocks  Underneath the crust is the mantle  The gases push these melted rocks called ‘magma’ 2012 85 031 8
  • 9. A Volcano is a special kind of mountain that builds itself  There are several thousand volcanoes in the world  Most of them are extinct  Some are dormant Arenal, Near Panama, Central America 2012 85 031 9
  • 10. Prevention of formation of cyclones or volcanoes are not in the realm of possibility. One of the mitigation measure against disaster is the efficient warning system. 2012 85 031 10