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All of the following reduce precipitation efficiency EXCEPT

  • A.a moist environment through the whole depth
  • B.a deep dry layer below the cloud base
  • C.strong vertical wind shear across the storm
  • D.vigorous entrainment of dry environmental air

Answer: A

A moist environment reduces both evaporation and the effect of entrainment. The other three each remove condensate before it can reach the ground. Losses can exceed the amount that actually falls. Efficiency below a tenth is observed in dry continental storms.

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