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37 terms

Winds - Local and Global

air moving from an area of high pressure to an area of low pressure
air pressure
the measure of the force with which air molecules push on a surface
an instrument used to measure wind speed
local wind
winds that blow over short distances; caused by the uneven heating of land and water examples are land and sea breezes
global wind
Winds that blow steadily from specific directions over long distances and caused by uneven heating of the earth which creates pressure differences
sea breeze
movement of air from sea to land during the day when cooler air from above the water moves over the land, forcing the heated, less dense air above the land to rise
land breeze
movement of air from land to sea at night, created when cooler, denser air (high pressure) from the land moves out to sea to replace warmer rising air (low pressure) over the sea
an imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole, 0 degrees latitude
Coriolis effect
the way earth's rotation makes winds curve
low pressure regions near the equator with little or no wind (calm winds)
horse latitudes
regions of high pressure and gentle winds at about 30 degrees north and south latitude.
the distance from the equator measured in degrees
trade winds
Prevailing winds that blow northeast from 30 degrees north latitude to the equator and that blow southeast from 30 degrees south latitude to the equator
prevailing westerlies
winds that blow west to east between 30 and 60 degrees in the northern and southern hemispheres; we live here
Polar easterlies
wind belts that extend from the poles to 60 degrees latitude in both hemispheres
jet stream
a narrow belt of strong winds that blow in the upper troposphere and directs storms in the United States
sinking cold air has this type of air pressure
high pressure
rising warm air has this type of air pressure
low pressure
the warm air at the equator is ________ dense than colder air found at the poles
less dense
Number of global wind types in Northern hemisphere
3 - trade winds, westerlies, polar easterlies
global wind that affects the United States
prevailing westerlies
Cold Air at the poles is _________ dense than the warm air at the equator
more dense
Cold air has __________ pressure than warm air
higher pressure
Warm air has ___________ pressure than cold air
lower pressure
warm air is less dense and
cold air is more dense and
during the day, land heats up _________ than water
during the night, land cools ___________ than water
air always moves from areas of _______ pressure to areas of ____________ pressure
from high pressure to low pressure
What causes wind
the unequal heating of the earth's surface causes differences in air pressure that results in wind
pressure belts occur about every ______ degrees latitude
30 degrees
type of air pressure found at the doldrums
low pressure
type of air pressure at the horse latitudes
high pressure
the doldrums are found at the _____________
equator or 0 degrees latitude
the horse latitudes are found at _____________
30 degrees North and South latitude
the type of air pressure found at the North and South pole
high pressure
the type of air pressure found at 60 degrees North and South latitude
low pressure