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

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Presentation transcript:

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

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

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

OBSERVATIONS: WINTER EQ

SUMMER

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

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

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

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

Maintenance of thermal wind equilibrium

In the previous class: Primitive equations: ( )

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