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BEENU RAVI P
B.Ed GEOGRAPHY
2014 - 2015
The total amount of rain received on a
given area during a given time as
measured by a rain gauge.
OR
The water equivalen...
Result of condensation.
Size of water droplets increase.
They cannot remain suspended in the air.
 Latitude
 Temperature
 Moisture
 Air masses
 Frontal activity
 Differential heating
 Mountain barriers
 Distribut...
Three types based on the process by
which clouds are formed.
1. Convectional Rainfall
2. Orographic Rainfall
3. Cyclonic o...
Surface air heated up and rises up.
Cools down in higher altitude.
Fall down as rain.
Accompanies with thunder and lig...
Water vapour
Condenses to
form clouds
Air cools down
Further cooling
leads to heavy
precipitation
Warm air rises
Ground he...
Rainfall is of short duration and heavy
showers.
Afternoon rainfall in the equatorial
regions.
Occurs in early summer i...
The word orography derived from a
Greek word oros which means a
mountain.
Found on the windward sides of
mountain ranges...
Saturated air from sea.
Hits the mountains.
Air cools in high altitude.
Falls as rain in the mountain slope.
Mountains forces the air to
rise
Water vapour
Condenses to
form clouds
Evaporation of
water from the
ocean
Onshore
moistur...
Rainfall that occurs on the Western
Ghats, southern slopes of Himalayas and
the Great Indian Plains during the rainy
seas...
Occurs along the frontal zones of
convergence.
Meeting of hot and cold air
Cold air push up the hot air
As altitude in...
Water vapour
Condenses to
form clouds
Warm moisture laden air
from the south meets cold
air from the north and
forms the W...
Winter precipitation in northern parts of
India, Europe and North America is of
frontal origin.
Occurs notably in the In...
 All 3 types of rainfall involve
 Warm moist air rising
 Warm air cooling
 Water vapour condensing to form clouds
 Fu...
Draw neat diagrams for conventional,
orographic and cyclonic or frontal rain
fall.
Rainfall ppt
Rainfall ppt
Rainfall ppt
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Rainfall ppt

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Rainfall ppt

  1. 1. BEENU RAVI P B.Ed GEOGRAPHY 2014 - 2015
  2. 2. The total amount of rain received on a given area during a given time as measured by a rain gauge. OR The water equivalent of all forms of atmospheric precipitation received in rain gauge.
  3. 3. Result of condensation. Size of water droplets increase. They cannot remain suspended in the air.
  4. 4.  Latitude  Temperature  Moisture  Air masses  Frontal activity  Differential heating  Mountain barriers  Distribution of land and water
  5. 5. Three types based on the process by which clouds are formed. 1. Convectional Rainfall 2. Orographic Rainfall 3. Cyclonic or Frontal Rainfall
  6. 6. Surface air heated up and rises up. Cools down in higher altitude. Fall down as rain. Accompanies with thunder and lightning. Resultant clouds are cumulonimbus type.
  7. 7. Water vapour Condenses to form clouds Air cools down Further cooling leads to heavy precipitation Warm air rises Ground heats up the air Sun’s rays heat up the ground CONVECTIONALRAINFALL
  8. 8. Rainfall is of short duration and heavy showers. Afternoon rainfall in the equatorial regions. Occurs in early summer in the temperate regions.
  9. 9. The word orography derived from a Greek word oros which means a mountain. Found on the windward sides of mountain ranges lying across the path of the prevailing terrestrial winds. The leeward sides of the mountains is the rain shadow region.
  10. 10. Saturated air from sea. Hits the mountains. Air cools in high altitude. Falls as rain in the mountain slope.
  11. 11. Mountains forces the air to rise Water vapour Condenses to form clouds Evaporation of water from the ocean Onshore moisture laden winds Air cools down Further cooling leads to precipitation FORMATION OF OROGRAPHIC RAINFALL Occurs in the mountains
  12. 12. Rainfall that occurs on the Western Ghats, southern slopes of Himalayas and the Great Indian Plains during the rainy season are orographic type.
  13. 13. Occurs along the frontal zones of convergence. Meeting of hot and cold air Cold air push up the hot air As altitude increase the hot air cool downs Condensation happens Rain occurs.
  14. 14. Water vapour Condenses to form clouds Warm moisture laden air from the south meets cold air from the north and forms the Warm Front Warm air rises Further cooling leads to precipitation along the Warm Front Air cools down FRONTAL OR DEPRESSION RAINFALL Cold airWarm air
  15. 15. Winter precipitation in northern parts of India, Europe and North America is of frontal origin. Occurs notably in the Intertropical Convergence Zone and the Polar Front.
  16. 16.  All 3 types of rainfall involve  Warm moist air rising  Warm air cooling  Water vapour condensing to form clouds  Further cooling leading to precipitation  The difference is the reason why the air is rising  Relief / Orographic – air is forced to rise over mountains  Convectional – air is being heated  Frontal – warm air is rising over cold air
  17. 17. Draw neat diagrams for conventional, orographic and cyclonic or frontal rain fall.

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