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Geography: Secondary Circulation

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Detailed notes about secondary circulation for grade 11 and grade 12 geography students including notes about the monsoon season in India and Föhn winds. The notes also contain questions to test your knowledge about the topic.

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Document information

  • September 19, 2020
  • 3
  • 2020/2021
  • Class notes
  • Unknown
  • All classes

Subjects

  • grade 11
  • grade 12
  • climate
  • monsoons
  • ieb
  • nsc
  • geography

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  • N/A
  • Geography
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Secondary Circulation
Regional air circulation
Eg. Monsoons, tropical cyclones, mid-latitude cyclones



Monsoons:
Winds that are created by the seasonal shifting of the ITCZ – different pressures that develop
over land and sea during summer and winter


• Winter monsoon: cold, dry weather
• Summer monsoon: warm, very rainy weather
• India, South-East Asia, Indonesia, Philippines, Northern Australia, West Africa


🇮🇳 India: 🇮🇳
Summer: Southwesterly monsoon
• ITCZ shifts North of equator – sun over Tropic of Cancer
• The land heats up and becomes warmer than surrounding ocean
• LP forms over land
• HP forms over ocean
• Air moves HP → LP
• Deflected right when it crosses the equator
• Takes moisture from ocean
• Heavy rain for a few days/weeks


Winter: Northeasterly monsoon
• ITCZ shifts South of equator – sun over Tropic of Capricorn
• The land cools faster than the ocean
• LP forms over ocean
• HP forms over land
• Air moves HP → LP

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