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10 Cards in this Set
- Front
- Back
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High Pressure Systems
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Low Energy
Cool Air Stable gentle winds Rotates anticlockwise |
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Low Pressure Systems
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Warm Air
High energy Lots of moisture Rotates clockwise |
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Hadley Cells
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Warm wet air rises over equator
Rain over equator Cool air pushed North and South |
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Orographic Rainfall
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Warm, wet air rises over mountain, forming rain
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Rainshadow
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Area of reduced rainfall in lee (sheltered side of the mountain). The dry air has already released moisture.
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Climate and Weather
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Sun directly over head = more incoming solar energy per area and less absorption by atmosphere
When sun is at an angle = same amount of energy dispersed over more area, more absorption by atmosphere |
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Australian Weather Patterns
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Tropical lows bring summer rain to Northern regions
Cold fronts bring winter rain to the southern margins Eastern crescent benefits from orographic rainfall Continental interior remains dry |
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La NIna
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High Pressure Cell over South America
Low Pressure Cell over Australia Warm water flows to Australia Good rain in Australia |
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El Nino
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Low Pressure Cell over South America
High Pressure Cell over Australia Warm water flows to South America Drought in Australia |
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Southern Oscillation Index
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Difference in air pressure between Tahiti and Darwin (Tahiti minus Darwin)
Positive SOI = La NIna Negative OSI = El Nino |
