1. Weather and Climate
Section 22. 3

2. Wind
Pressure gradient: when air pressure varies, the air will move to an area of high pressure to low pressure = wind!
Coriolis Effect: curved paths of wind due to Earth’s rotation
Reason we have predictable wind patterns

3. Winds in Northern Hemisphere curve clockwise.
Winds are named for
the direction in which
they come from
Winds in Northern Hemisphere curve clockwise.
Winds in the Southern Hemisphere curve counterclockwise.
Cells: three loops in both hemispheres
Created because of differences in temperature

4. Front: boundary between two air masses
Air Mass: large body of air with a constant temperature and moisture content throughout
Front: boundary between two air masses
Cold: blue line with triangles
Warm: red line with semicircles
Stationary: alternating blue and red line with triangles and semicircles

6. Fronts bring a change in temperature and wind direction
Warm Front:
warm air pushed over cool air slowly
cirrus and nimbostratus clouds
steady precipitation
Cold Front:
cold air moves under warm air quickly
cumulonimbus clouds
high winds and thunderstorms

7. The average weather over a long period of time.
Climate
The average weather over a long period of time.
Why do we experience a change seasons?