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All of the following must be true for a glaciogenic seeding operation to have any chance of success EXCEPT

  • A.the cloud is already producing heavy precipitation
  • B.supercooled liquid water is present in the cloud
  • C.the cloud temperature is below the agent's threshold
  • D.the agent actually reaches the supercooled region

Answer: A

Correct answer: the cloud is already producing heavy precipitation

A cloud already precipitating heavily has nothing to gain: its water is already being converted. Seeding is plausible only where the process is limited by a shortage of ice nuclei, so supercooled water must be present, the temperature must be below the agent’s threshold, and the agent must actually reach it.

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