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Comment: Confirmed: Information provided here refers to the introduction of MIR and is currently up to date.

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In particular, the different handling of missing values in the interpolation formula leads to differences close to the coasts and ice shelves.  This is demonstrated here using the model bathymetry field and considering only the differences in the missing values in fields produced by MIR and EMOSLIB.

HRES WAM 0.125 degree reduced lat-lon grid

The model bathymetry has been interpolated from the 0.125 degree reduced lat-lon grid target grid to regular lat-lon grids at different target resolutions using EMOSLIB and MIR and the number of missing values in the resulting fields compared (the values themselves are not considered here).

  • Differences As expected, differences are seen as expected around the coasts.
  • Other parameters may also show differences close to the ice shelves which may change from day-to-day.
  • For wave 2d spectra small values (below approximately 10-4) are encoded with missing values.  As a result, Wave 2d spectra  may show additional differences over sea points well away from the coasts and ice shelves.

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