Global Winds / Planetary Winds (Grade 12 NSC Matric Geography): Flashcards
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10 cards from this deck
Global air circulation
Global air circulation
Large-scale movement of air masses around the planet
Three major global wind systems
Three major global wind systems
Tropical easterlies, westerlies, polar easterlies
Cause of Coriolis force
Cause of Coriolis force
Earth's rotation
Coriolis effect in southern hemisphere
Coriolis effect in southern hemisphere
Deflects moving air to the left
Tri-cellular pattern
Tri-cellular pattern
Three circulation cells in each hemisphere
Hadley cells location & driver
Hadley cells location & driver
Nearest equator, driven by intense solar heating
ITCZ (Intertropical Convergence Zone)
ITCZ (Intertropical Convergence Zone)
Where trade winds from both hemispheres meet near equator
Trade winds direction
Trade winds direction
From subtropical high pressure to equatorial low pressure
Subtropical high pressure latitude
Subtropical high pressure latitude
Around 30° latitude
Polar cells characteristic
Polar cells characteristic
Driven by cold, dense air sinking at poles