Interpolation of all wave fields are affected by the changes to

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 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).

The plots show the location of the points that differ:


TargetStatistics of differencesGlobalEurope
0.125x0.125

Number of points different =  114
     Sea (EMOSLIB) to Land (MIR) = 49
     Land (EMOSLIB) to Sea (MIR) = 65

Percentage of points unchanged = 99.997%

0.25x0.25

Number of points different =  37
     Sea (EMOSLIB) to Land (MIR) = 14
     Land (EMOSLIB) to Sea (MIR) = 23

Percentage of points unchanged = 99.996%

0.5x0.5

Number of points different =  17
     Sea (EMOSLIB) to Land (MIR) = 8
     Land (EMOSLIB) to Sea (MIR) = 9

Percentage of points unchanged = 99.993%

1.0x1.0

Number of points different =  4
     Sea (EMOSLIB) to Land (MIR) = 3
     Land (EMOSLIB) to Sea (MIR) = 1

Percentage of points unchanged = 99.994%