Wind is the moving air masses due to the earth’s unequal surface heating because of its angular tilt.

1. WINDS
By Prof. Liwayway Memije-Cruz

2. What is a wind?
The moving air masses
due to the earth’s
unequal surface heating
because of its angular
tilt.

3. Types of Winds

4. Map of cyclone areas worldwide. Orange areas are regions where
conditions are suitable for cyclone formation. Image courtesy of NASA
Cyclone

5. Cyclone: Low pressure system wind
blows in a counterclockwise direction

6. Cyclone formation.
Air swirls the area of
low-pressure before
rising upwards from the
ocean surface. Image
courtesy of Geoscience
Australia

7. Anticyclone: high pressure system with
clockwise circulation

8. Anticyclone formation
Anticyclones form from
air masses cooling more
than their surroundings,
which causes the air to
contract slightly making
the air more dense.
Since dense air weighs
more, the weight of the
atmosphere overlying a
locatiion increases,
causing increased
surface air pressure.

9. Land-Sea Breeze

10. Monsoons

11. Monsoons
 Monsoons, or rainy
seasons, are a shift in
wind direction which
causes excessive
rainfall in many parts of
the world including
Asia.
 seasonal land sea
breeze
 a shift in global wind
patterns

12. Chinook winds

13. Chinook winds
 The chinook winds
can be a nice
warming wind
bringing instant spring
in the middle of winter
or a howling
destructive
windstorm. Chinook
winds can raise
temperatures by 25 to
35 degrees in
minutes, melt snow
completely, sandblast
cars, collapse