Download - Monsoon by mazhar iqbal
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Muhammad Zeeshan Hassan
Hafiz Ali Muhammad
Shahid Waqas Khan
Mazhar Iqbal
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• Introduction
• Process• Summer Monsoon
• Winter Monsoon
• Regions• Asia
• Africa
• Australia
• Europe
• North America
• Impacts
• Conclusion
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o Comes from an Arabic word “mausim” means season.
o A seasonal change of strongest winds of a region.
o Usually rainy phase of a seasonally changing pattern.
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o Often associated with Indian Ocean.
o A way of life in most of the Asia, Africa and Australia.
o It is a common seasonal event in Europe and North America as well.
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• Water has high heat capacity than land.
• Water absorbs a lot of heat before it begins to get warm.
• Also it does not emit heat rapidly when temperature drops in surroundings.
• Land has more variable temperature than water.
• When air warms up, it expands.
• Air rises upward and an area of low pressure develops.
• So pressure drops at that place and wind flows from cooler place (high pressure to lower pressure)
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o Summer Monsoono From April to October
o Winter Monsoono From October to April
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Regions of Monsoons
• A land which receives a good amount of rainfall during a particular season
• Monsoon regions lie from 80 – 350 on either side of equator.
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• Subsystems
• South-Asian monsoon
• South-West monsoon
• North-East monsoon
• East-Asian monsoon
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• From June to September in almost whole Pakistan
• The winds from Indian Ocean blow towards subcontinent.
• These winds splits into two branches
• Arabian Sea branch
• The Bay of Bengal Branch
Source: pakweather.com
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• Around October, the temperature of the Northern landmass drop rapidly.
• The cool winds below from Himalaya to Indian Ocean.
• These winds cause rain in parts of Srilanka and India
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• Put its influence on large part of Indo-China, Philippines, China, Korea and Japan.
• The pattern of monsoon is similar to south Asian monsoon
• From May through August, rain belt moves northward causing a series of dry and rainy phase over Indo-China and South China Sea
in May.
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• In Africa, great seasonal temperature and humidity difference between Sahara and equatorial Atlantic Ocean causes the monsoon.
• The semiarid Sahel and Sudan depends upon this pattern of monsoon rains.
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• Starts in late June or early July and end in September.
• Affected Areas
• Arizona
• California
• Nevada
• Gulf of Mexico.
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• Known as Indo-Australian Monsoon.
• The rainy season spans from September to February.
• This produces a cyclonic circulation vortex over Borneo which cause significant weather change in the region.
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o European monsoon is due to the revival of westerly winds from Atlantic
o It is also known as the “Return of Westerly's”.
o It is not classified into traditional monsoon as it does not meet all the requirements of monsoon.
o Rain usually arrives in two waves.
o First wave at the beginning of June
o the second at the mid to late June.
o The areas affected o Europe’s North Atlantic coastline, Ireland, Great Britain,
the Benelux countries, western Germany, Northern France and parts of Scandinavia
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• Without water no life is possible.
• Enhances the underground storage of water.
• Also the water in the dams is refilled.
• Refreshes human minds.
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• Fuel savings due to higher rain fall
• Contributes towards the economy
• Cools the earth
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• Heavy rains cause floods.
• Floods cause :• death of people,
• wash away buildings and
• destroy the crops
• ( July, 2010 floods 1,781 deaths and $43 billion damages).
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• Heavy rains also cause road accidents
• Poisonous insects and reptiles
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• http://www.low-insurance.org/top/monsoon-seasons-in-arizona/
• http://archaeologynewsnetwork.blogspot.com/2012/11/indian-monsoon-failure-more-frequent.html
• http://articles.economictimes.indiatimes.com/2012-05-06/news/31588216_1_normal-rainfall-monsoons-food-grain-production
• http://blog.globe.gov/sciblog/2011/12/21/what-exactly-is-the-monsoon/
• http://www.s-cool.co.uk/a-level/geography/weather-conditions/revise-it/types-of-monsoons
• www.pakweather.com
• www.samirbharadwaj.com
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