Discussion
Which vorticity does a solid body rotation of the atmosphere possess?
Answer: D
For solid body rotation the vorticity is uniform and equal to twice the angular velocity, which is why the planetary vorticity is \( 2\Omega\sin\phi \) rather than \( \Omega\sin\phi \). The factor of two catches many people out. Vorticity is uniform throughout a solid body rotation, so it certainly does not depend on radius, and it is emphatically not zero.
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