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The current model version permits nudging of the following 9 prognostic variables that are stored in two external forcing files (one gridpoint file and one spectral file) for each nudging step

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  • Vorticity,
  • divergence,
  • temperature,
  • surface pressure,
  • specific humidity,
  • ice water contents,
  • liquid water contents,
  • cloud fraction,
  • and stratospheric ozone.

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In this context disk space usage will become a consideration as an increasing number of nudged variables will result in larger forcing files. At T255L60, for instance, forcing files that contain all 9 variables require 70 MB for each time step (47 MB for the grid point file , and 23 MB for the spectral file).

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