Study Guide (lecture # 9)

Book pages: 96-111

Review:

- maintenance against friction (Chapter 6.2.2)

Today's topics:

- momentum balance (viewed as a KE tendency problem) (start Chapter 4.2)

Jargon:

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Component K.E. equations:

- increments on a sphere: dx = r cos(phi) d lambda, dy = r d phi
- definitions
- flux form of advection terms
- group terms by 4 physical processes (3 are considered in concert w/ APE)

- what are they; where do they come from; why are they so-named?

- u'v' is a northward flux of zonal momentum (not other way around)

- where is the mountain torque?

- observations & interpretation applied to friction torques
- Questions:

- What is the zonal mean distribution of torque?
- How does torque imply transport?
- How does the atmosphere make the transport? (consider term A)

- what do contributors to term A look like? (fig. 4.7 & 4.8)

- Eddy fluxes, meridional cells and jets are connected

- geometric factors (e.g. R) are significant
- pressure average versus vertical distribution
- energy conversion from eddy fluxes matches well the angular velocity profile
- flux is up the gradient: "negative viscosity"

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