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Discussion

Consider the following pairs of method and what it uses.

Kinematic - divergence of the wind

Omega equation - vorticity and thermal advection

Adiabatic - observed temperature change

Isentropic - divergence of the wind

How many of the pairs given above are correctly matched?

  • A.Only two
  • B.All four
  • C.Only three
  • D.Only one

Answer: C

The isentropic method uses the slope of potential temperature surfaces and the flow along them rather than the divergence of the wind, so the last pairing is wrong. The other three are correctly matched. Each method has its own error characteristics, and comparing two of them on the same case is a standard way of judging how much confidence the derived vertical motion deserves.

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