1. BLOWIN' IN THE WIND

2. temperature differences cause pressure differences which cause the movement of air, wind
USA wind map
Earth wind map graphic=-74.14,2.58,303

3. a wind’s job is to distribute the unequal heating of the earth
warm air creates lower pressure
cool air creates higher pressure
air moves from higher pressure to lower pressure

4. winds are named for the direction in which they come from

5. there are 3 categories of winds:
local/regional, global, & episodic (storms)

6. there are 4 types of local/regional winds: land/sea breeze, monsoon, mountain/valley wind, & foehn

7. 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

8. 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

9. 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

10. 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

11. HW:
Read pages
Answer # 1-3 on page 373
Read page 376
Answer # 5 on page 377
Answer # page 387
Read
Answer # 3, 4 page 429