1. ATOC 4720 class 39
Thermally driven circulation with the influence of planetary rotation

2. Previous class: without rotation (f=0)
LAB EXP:
Net+Latent heat EQ
North Pole

3. Atmosphere: Symmetric Hadley Cells (f=0)
High P
Pressure
High P
High P
Low P

4. OBSERVATIONS:
WINTER EQ

5. SUMMER

6. Angular momentum, equation, and conservation
Air parcel: unit mass

7. Conservation: ideal case: P is independent of longitude: No friction
Equation:
Friction
Conservation: ideal case: P is independent of
longitude:
No friction
=constant

8. Assume an air parcel at EQ, u=0
Westerly winds!
Geostrophic winds: parallel to isobars!

9. Maintenance of geostrophic balance: Frictionless
Quasi-geostrophic motion
Convergence
Divergence
Z-coordinate: If

10. Maintenance of thermal wind equilibrium

11. In the previous class: Primitive equations:( )