common atmospheric phenomena
TRANSCRIPT
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COMMON ATMOSPHERIC PHENOMENA
Why the wind blows?Why monsoons occur?
What is the so-called Intertropical Convergence Zone?
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What happens when air is heated?
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What Makes the Air Move?
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WINDS
- Are air that is moving horizontally.- Are caused by differences in air
pressure.
AIR MOVES TOWARD THE PLACE WHERE WARM AIR IS RISING.
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LOCAL WIND--a wind that blows over a short distance.
--caused by the UNEQUAL heating of Earth’s surface within a small region.
Example: Sea breeze Land breeze
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Which warms up faster?
Land or Water?
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SEA BREEZEDuring the day, the land heats up faster than the water in the sea.
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LAND BREEZEDuring the night, the land and sea will both cool down. But the land will lose heat faster than the water in the sea.
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GLOBAL WIND--Winds that blow over long distances from a specific direction.--caused by the UNEQUAL heating of Earth’s surface across a large region.
Examples: Trade windsWesterliesPolar Easterlies
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GLOBAL WIND1. TRADE WINDS--are wind belts just north and south of the equator. In the Northern Hemisphere, they blow from northeast to the southwest.
2. WESTERLIES--the prevailing westerlies occur between 30º and 60º latitude in both hemisphere. These winds generally blow from west to east over much of North America.
3. POLAR EATERLIES--extend from 60º latitude to the poles in both hemispheres.
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Why monsoons occur?
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MONSOON--is wind system that is characterized by seasonal reversal of direction.
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MONSOON1. AMIHAN (Northeast Monsoon)--comes from northeast and moves toward the south.
2. HABAGAT (Southwest Monsoon)--comes from southwest and moves toward the north.
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What is the so-called Intertropical Convergence
Zone (ITCZ)?
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Intertropical Convergence Zone (ITCZ)
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Intertropical Convergence Zone (ITCZ)
--is the place where winds in the tropics meet or converge.
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Intertropical Convergence Zone (ITCZ)
In the time rising warm air will form clouds, which may lead to thunderstorms.
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