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Rainfall is a term used to refer to water
falling in drops after condensation of
the atmospheric vapour. The term is
also ...
Monsoon winds
Monsoon winds are seasonal winds which
blow during summer and winter. The summer
winds are called South-west...
South-west monsoon:
 South-west monsoon are giant sea breezes
which bring rainfall. The rains began when the
ocean are le...
Monsoon and Pakistan
Pakistan receives the tail end of the monsoon.
Which enter the Pakistan after crossing India
they usu...
Western depression
The western depression winds blow from
the Mediterranean sea in the winter and
after passing through Ir...
The Western depression enter Pakistan from the west after
passing through Iran and Afghanistan, most of their moisture is
...
Convectional currents
This happens when hot air rises from
the hot land into the air. This air is high
in moisture, and ca...
Convectional currents cause some degree of
rainfall in Pakistan during the summer months.
This condensation results in rai...
Relief rainfall
Relief rain usually takes place around coastal
areas where a fleet of hills runs along to the
coast. When ...
Relief rainfall and Pakistan
Cities like Murree and Kakul continually receive
rainfall due to this while Gilgit and Chitra...
Tropical cyclones
A tropical cyclone is a rapidly-rotating storm
system characterized by a low-pressure center,
strong win...
Tropical cyclones and Pakistan
They originate in Arabian Sea quite often but rarely
reach the coast of Pakistan. Therefore...
RAINFALL presentation
RAINFALL presentation
RAINFALL presentation
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RAINFALL presentation

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RAINFALL presentation

  1. 1. Rainfall is a term used to refer to water falling in drops after condensation of the atmospheric vapour. The term is also used to refer to the quantity of precipitation falling in an area within a given period of time. Rainfall
  2. 2. Monsoon winds Monsoon winds are seasonal winds which blow during summer and winter. The summer winds are called South-west monsoons and the winter winds are called North-east monsoons.
  3. 3. South-west monsoon:  South-west monsoon are giant sea breezes which bring rainfall. The rains began when the ocean are less heated and land is more heated. The air from the land rises developing a low pressure and it attracts the cool air causing heavy rainfall. The southwestern summer monsoons occur from June through September North-east monsoons:  North-east monsoons blow from the land towards the sea.
  4. 4. Monsoon and Pakistan Pakistan receives the tail end of the monsoon. Which enter the Pakistan after crossing India they usually reach Pakistan in early July and continue to September. Since the monsoon come into Pakistan from the East. The eastern part receive more rainfall in the monsoon, the main monsoon enter Northern Punjab while the secondary Southern Punjab and Sindh. The highest rainfall during the monsoon season as receive by Murree that is 850mm.
  5. 5. Western depression The western depression winds blow from the Mediterranean sea in the winter and after passing through Iran and Afghanistan they enter in the western area of Pakistan and cause rainfall.
  6. 6. The Western depression enter Pakistan from the west after passing through Iran and Afghanistan, most of their moisture is lost on their long land journey. Therefore they bring a small amount of rainfall to Pakistan in spite of this the western parts of western highlands receive more rainfall from the western depression then from other sources. Because of Western Depression Northern Punjab, the hilly areas of kpk and Northern Baluchistan receive 125 to 250mm of rainfall. Sindh is the driest area where in most parts the rainfall is less then 25mm. Rain fall from western depression begins in December and continues up to March. Western depression and Pakistan
  7. 7. Convectional currents This happens when hot air rises from the hot land into the air. This air is high in moisture, and causes a lot of condensation when it reaches the atmosphere. This condensation results in rainfall in different areas in summer.
  8. 8. Convectional currents cause some degree of rainfall in Pakistan during the summer months. This condensation results in rainfall in the northern and north-westren parts of Pakistan in the summer. The southern parts of Pakistan are deprived from convectional currents due to a temperature inversion layer Convectional currents and Pakistan
  9. 9. Relief rainfall Relief rain usually takes place around coastal areas where a fleet of hills runs along to the coast. When wet onshore wind from the sea meet a mountain, hill and barrier, it is forced to rise along the slope and cools. When the air temperature falls to its dew point, water vapor condenses to form clouds. When the clouds can no longer hold the water droplets, relief rain begins to fall on the windward slope of the mountain.
  10. 10. Relief rainfall and Pakistan Cities like Murree and Kakul continually receive rainfall due to this while Gilgit and Chitral do not as they fall in the rain shadow areas.
  11. 11. Tropical cyclones A tropical cyclone is a rapidly-rotating storm system characterized by a low-pressure center, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain, can cause a lot of destruction.
  12. 12. Tropical cyclones and Pakistan They originate in Arabian Sea quite often but rarely reach the coast of Pakistan. Therefore, this source of rainfall is totally unreliable.

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