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Which condition on potential temperature indicates neutral stratification?

  • A.It increases with height at exactly the rate given by the dry adiabatic lapse rate for the layer concerned
  • B.It decreases with height
  • C.It varies with height in the same way that the actual temperature does within the layer being considered
  • D.It is constant with height

Answer: D

A layer of constant potential temperature is one in which the actual temperature falls at exactly the dry adiabatic rate, so a displaced parcel finds itself with the same density as its surroundings. Well mixed convective boundary layers are close to this state. The second option describes a situation that cannot arise, since constant potential temperature and the dry adiabatic temperature profile are the same thing. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.

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