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Parametrisation in a climate model refers to

  • A.adjusting the model to match the observations
  • B.choosing the grid spacing to be used
  • C.the coupling of ocean and atmosphere
  • D.representing sub-grid processes indirectly

Answer: D

Cloud, convection and turbulence all occur on scales below the grid and must be represented rather than resolved. Parametrisation is the single largest source of difference between models. Nothing below the grid can be resolved.

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