1. Global air circulation is influenced by the Coriolis Effect

2. OBSERVED
Global convection creates not one big 0 – 90 degree cell, but a set of three N and S of the equator
The surface winds created by the convection cells do not flow N-S as expected
WHY?

3. Because the earth rotates on it’s axis
The equator has the greatest rotation; the poles the least

4. A SET of convection cells is created

5. to the left in the southern hemisphere
WINDS ARE DEFLECTED
to the right in the
northern hemisphere
to the left in the southern
hemisphere

6. The horizontal aspect of
each convection cell, although in a north-south direction, creates east-west air flow and winds

7. Net effect is to create a set of convection cells that circulate roughly N/S, creating winds that move air E/W

8. A set of convection cells are
created every 30 degrees of latitude

9. Plus E/W winds

10. Well, maybe not so simply….