13 terms

Global and Local Winds

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cause of uneven heating of Earth's surface
the Earth is a sphere, more direct concentrated rays heat equator area, less direct rays reach polar areas
what is wind
the movement of air caused by difference in temperature which creates differences in air pressure
air pressure
A force that is the result of the weight of a column of air pushing down on an area.
cold air is more dense, warm air is less dense
Coriolis Effect
The effect of Earth's rotation on the direction of winds and currents. Northern hemisphere turns in a clockwise direction, Southern hemisphere turns in a counter clockwise direction
Jet Stream
a high-speed high-altitude airstream blowing from west to east near the top of the troposphere affecting weather and air travel
Trade Winds
prevailing winds that blow from east to west from 30 degrees latitude to the equator in both hemispheres
Westerlies
prevailing winds that blow from west to east between 30 degrees and 60 degrees latitude in both hemispheres
Polar Easterlies
prevailing winds that blow from east to west between 60 degrees and 90 degrees latitude in both hemispheres
how winds are named
from the direction from which they come; from the H pressure area to the L pressure area
Land Breeze
movement of air from land to sea at night, created when cooler, denser air from the land forces up warmer air over the sea
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
Mountain Breeze
A wind that blows from a mountain to a valley at night when mountain air is cooler.
Valley Breeze
A breeze that blows up the mountainside from the valley when air on the mountain slopes heats and rises