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Which profile shape is called an inverted V?

  • A.A layer in which the temperature and dew point curves converge steadily with height until they meet at the top
  • B.A deep dry adiabatic layer with a large dew point depression
  • C.A saturated layer near the surface beneath a very dry layer aloft, giving a large potential for convection
  • D.An isothermal layer

Answer: B

The temperature and dew point curves diverge markedly through a deep well mixed layer, giving the appearance of an inverted V on the diagram, which indicates a high cloud base and strong potential for evaporatively driven downdraughts. It is characteristic of the high plains in summer. The profile described in the second option would give the opposite behaviour. A single measurement chosen to respond to the one asymmetry beats several that respond to shared behaviour.

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