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Precipitation loading contributes to a downdraught by

  • A.the latent heat released as the drops first form
  • B.the electric charge carried by the falling drops
  • C.the friction of the drops against the ground below
  • D.the weight of the hydrometeors dragging air downward

Answer: D

A high concentration of condensate adds appreciably to the density of the air. Together with evaporative cooling it drives the strongest downdraughts observed in convective storms. Loading and cooling reinforce one another directly.

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