Subsidence and Convergence (Grade 11 NSC Matric Geography): Flashcards
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Subsidence
Subsidence
Air masses sinking downward in the atmosphere
Latitudes where subsidence occurs
Latitudes where subsidence occurs
30 degrees north and south of the equator
Weather effect of subsidence
Weather effect of subsidence
Creates dry conditions as air warms and compresses
Convergence
Convergence
Air masses move together and are forced to rise upward
ITCZ full name
ITCZ full name
Intertropical Convergence Zone
Weather effect of convergence at ITCZ
Weather effect of convergence at ITCZ
Heavy rainfall from rising, cooling air forming clouds
What does the ITCZ follow seasonally?
What does the ITCZ follow seasonally?
The thermal equator
ITCZ position in June
ITCZ position in June
Shifts northward following sun at Tropic of Cancer
Weather with high-pressure systems
Weather with high-pressure systems
Stable, dry conditions
Weather with low-pressure systems
Weather with low-pressure systems
Unstable, wet conditions