Transcript Global Wind Patterns

Wind!
MCAS Bootcamp:
Wind
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Caused by the sun.
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Air near the ground is heated.
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Warm air is less dense and rises up.
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Cold air rushes in (wind) to take its place.
Global Wind Patterns (Pg. 155-156)
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Areas closest to the equator are warmest
because they receive the most direct sunlight.
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Differences in air temperature cause wind
currents (Convection Cycles)
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Warm air from the equator moves toward the
Earth’s poles; Cool air at the poles moves
toward the equator.
Global Wind Patterns
Global Wind Patterns
Local Wind Patterns (pg. 157)
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Land heats up quickly and cools down quickly.
Water heats up and cools down slowly.
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Daytime: Air over warm land heats up and is
replaced by cool ocean breezes.
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Nighttime: Air over warm water rises up and is
replaced by cool breezes from the land.
Local Wind Patterns (Day)
Local Wind Patterns (Night)
The Water Cycle
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Evaporation: Water is heated and changes from liquid
to gas (water vapor)
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Condensation: Water cools and forms back into liquid.
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Rivers, Lakes, Oceans, Puddles, Plants
Clouds, Fog, Dew
Precipitation: Water is too heavy to remain in the air and
falls back to Earth
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Rain, Snow, Sleet, Hail
Water Cycle
The Water Cycle
Earth’s Tilt=The Reason for Seasons
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During summer, the Earth is tilted toward the sun
and receives more direct sunlight.
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During winter, the Earth is tilted away from the sun
and receives less direct sunlight.
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During spring and fall, the Earth is not tilted toward
or away from the sun.
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Summer in the northern hemisphere is winter in the
southern hemisphere, and vice-versa.
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Climate—Year Round
(NOT Weather, which is daily)
Latitude—Further from the equator=colder climate
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(Less Direct Sunlight)
Altitude—Higher above sea level = colder climate
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(Less things to absorb sunlight)
Oceans—Cooler Summers and Warmer Winters
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(Because water takes longer to heat up and cool down.)