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Downscaling is used to

  • A.obtain regional detail from a global model
  • B.reduce the resolution of the model used
  • C.shorten the length of a model run
  • D.remove any need at all for parametrisation

Answer: A

Dynamical downscaling nests a fine grid regional model inside the global one, and statistical downscaling uses fitted relationships instead. Neither adds information the global model did not contain. Two distinct approaches exist.

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