BLOWIN' IN THE WIND
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Transcript of BLOWIN' IN THE WIND
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BLOWIN' IN THE WIND
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temperature differences cause pressure differences which cause the movement of air, wind
USA wind map http://hint.fm/wind/
Earth wind map http://earth.nullschool.net/#current/wind/isobaric/10hPa/orthographic=-74.14,2.58,303
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a wind’s job is to distribute the unequal heating of the earth
warm air creates lower pressurecool air creates higher pressureair moves from higher pressure to
lower pressure
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winds are named for the direction in which they come from
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there are 3 categories of winds:local/regional, global, & episodic
(storms)
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there are 4 types of local/regional winds: land/sea breeze, monsoon, mountain/valley wind, & foehn
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LAND/SEA BREEZES
diurnal wind change on the coast land breeze: at night the land cools down
faster, creating a higher pressure and cool winds coming from the land
sea breeze: in the day the water heats up slower, creating a higher pressure and cool winds coming from the water
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MONSOONS seasonal change in wind, Arabic word
meaning season in the winter the land cools down faster, creating a higher pressure and dry winds coming from the land in the summer the water heats up slower, creating a higher pressure and wet winds coming from the water
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MOUNTAIN/VALLEY WINDS
diurnal wind change in the mountains due to density differences
mountain wind: at night the cooler, more dense air of the mountain falls into the valley
valley wind: during the day the air in the valley warms up (low pressure) and rises into the mountains
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FOEHN extremely warm and dry air that comes down
the leeward side of a mountain can evaporate 2 feet of snow and raise the
temperature 50 °F in 12 hours chinook “snow eater”, is the local name for a
foehn in the Rocky Mountains
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HW:Read pages 366-373Answer # 1-3 on page 373Read page 376Answer # 5 on page 377Answer # 21-25 page 387Read 427-429Answer # 3, 4 page 429