Class notes
settlements ieb geography
- Course
- Geography
- Institution
- 12th Grade
in depth summary of the ieb geography settlements section
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CYCLONESTROPICAL CYCLONES
LOCATION
• Tropics – between 5°-30° N & S
• Ocean temps in region – 27°C
• Not at 0° due to Coriolis force
NAMES
• Caribbean/north Atlantic – Hurricanes
• China/Philippines/North pacific – Typhoons
• East Africa/Madagascar/Indian ocean – Tropical cyclones
East side = warm oceans
OCCURANCE
Late summer to early autumn when oceans are warmest
• Northern Hemisphere: Aug-Oct
• Southern Hemisphere: feb-may
- Due to global warming, there has been a rise in ocean temps
which has led to tropical cyclones outside of these seasons
They are stronger and occur more often
Future storms will cause more damage as rising sea levels
exacerbate storm surges, flooding and erosion of coastal areas
Storm surge: a storm [rain and wind] causes sea levels to rise by a
certain amount of meters [not a tsunami]
, PROPAGATION
• E ® W away from equator
• Carried by tropical easterlies [trade winds]
• Southern hemisphere: NE ® SW
• Northern hemisphere: SE ® NW
CIRCULATION
• Southern hemisphere: rotate clockwise around a LP centre
• Northern hemisphere: rotate anticlockwise around a LP centre
DUE TO CORIOLIS FORCE
PROFILE OF A HIGH AND LOW PRESSURE CELL IN THE NORTHERN
HEMISPHERE
CHARACTERISTICS
• Speed of movement – 25km/h
• Wind speed – 200-300km/h
• Pressure in eye – 940hPa
• Vertical extent – 15km
• Diameter of eye – 50km
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