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Which feature on a sounding indicates the depth of a cloud layer?

  • A.The depth of the layer within which the wind veers steadily with height as the observations are plotted
  • B.The depth over which the two curves remain together
  • C.The depth over which the temperature falls at the dry adiabatic rate as the parcel ascends through the layer
  • D.The height of the tropopause

Answer: B

The layer in which temperature and dew point coincide is saturated and therefore cloudy, and its vertical extent gives the cloud depth directly. A dry adiabatic lapse rate indicates a well mixed layer, which may or may not be cloudy at its top. Reading cloud base, top and depth from a single plotted sounding is among the most useful practical skills the diagram provides. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.

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