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The lifting condensation level is the height at which

  • A.the parcel becomes warmer than its surroundings
  • B.a rising parcel first becomes saturated
  • C.a rising parcel stops rising altogether
  • D.the temperature of the parcel reaches zero degrees

Answer: B

Correct answer: a rising parcel first becomes saturated

A rising parcel cools at the dry adiabatic rate while its dew point falls only slowly, so the two converge; the height at which they meet is the lifting condensation level, and condensation begins there. It is the cloud base for any parcel lifted from the surface, which is what the next item is about.

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