blowin' in the wind
DESCRIPTION
BLOWIN' IN THE WIND. 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. - PowerPoint PPT PresentationTRANSCRIPT
BLOWIN' IN THE WIND
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
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
winds are named for the direction in which they come from
there are 3 categories of winds:local/regional, global, & episodic
(storms)
there are 4 types of local/regional winds: land/sea breeze, monsoon, mountain/valley wind, & foehn
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
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
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
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
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