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Which limitation restricts the adiabatic method?

  • A.Diabatic heating invalidates the assumption
  • B.It requires wind observations at a much closer spacing than any operational network is able to supply
  • C.It cannot be used over the ocean
  • D.It gives only the sign of the vertical motion and never any indication of its actual magnitude

Answer: A

Latent heat release in a precipitating system violates the adiabatic assumption on which the method rests, and since precipitation accompanies most large-scale ascent the limitation bites hard. Radiative cooling is a smaller but persistent additional problem. The method uses temperature observations rather than dense wind data, works anywhere soundings exist, and gives a quantitative result. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.

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