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Which of the following is not a term in the classical omega equation?

Friction

Differential vorticity advection

Thermal advection

Static stability

  • A.Friction
  • B.Differential vorticity advection
  • C.Thermal advection
  • D.Static stability

Answer: A

The classical adiabatic frictionless omega equation contains differential vorticity advection and thermal advection as forcing, with static stability appearing in the coefficient of the vertical derivative. Friction appears only in extended forms. Knowing exactly what the classical equation assumes is what tells you when an extra term is needed for a particular application.

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