A comprehensive and flexible package, Meteorological Interpolation and Regridding (MIR), is now used at ECMWF to interpolate data for presentational or other purposes.  It has three aims:

  • to accept information in any grid point format (e.g. observations or satellite data),
  • to convert model or other data from any grid pattern format to any other grid pattern as desired (using an Any-to-Any algorithm).
  • to present model or other data graphically on any grid pattern, including 3-D presentations, and include rotation and cropping as desired.   

The procedure uses an unstructured grid system allowing great flexibility and has proved economical with computer processing time.

The interpolation package MIR does not use a land-sea mask when interpolating data to another resolution as the data will already have taken the land-sea mask into account during processing at the appropriate resolution of the IFS.  However, interpretation of the IFS land-sea mask by MIR shows a few points change in nature from land to sea or sea to land very slightly modifying the display of geographical features.

Users are advised to keep themselves updated about the products through the ECMWF Newsletters and web site.

Further information available on interpretation of MARS data using MIR.