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Three of the following help explain rapid warm rain onset. Which is the odd one out?

  • A.stochastic rather than continuous collection
  • B.giant nuclei acting as early collectors
  • C.turbulence enhancing collision rates
  • D.the warming of the cloud by released latent heat

Answer: D

Correct answer: the warming of the cloud by released latent heat

Latent heat release drives the updraught and so affects the cloud’s dynamics, but it is not a microphysical mechanism for producing rain quickly. The other three all act directly on collection: chance in the stochastic model, giant nuclei as ready-made collectors, and turbulence increasing the rate at which droplets encounter one another.

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