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Interpolation of significant wave height is affected by the changes to
- the default interpolation method
- the distance computation and selection of nearest points
- the handling of missing values
HRES WAM 0.125 degree reduced lat-lon grid
Significant wave height has been interpolated from the 0.125 degree reduced lat-lon grid target grid to regular lat-lon grids at different resolutions using EMOSLIB and MIR.
- The differences for more than 99.8% of grid points are less than 0.05m.
- The largest differences occur close to the coasts and ice shelves. This is due to the different handling of missing values in the interpolation formula.
Target | Statistics of differences | Histogram of differences | Global | Europe |
---|
0.125x0.125 | Maximum difference = 1.139648 Minimum difference = -1.192383 Mean absolute difference = 0.000186 Median absolute difference = 0.000000 Standard deviation = 0.005439 RMS of differences = 0.005439 Percentage of points with absolute difference < 0.05 = 99.895% < 0.10 = 99.953% < 0.50 = 99.999% | -1.200000 : -1.100000 - 1 ( 0.000024%) -1.100000 : -1.000000 - 1 ( 0.000024%) -1.000000 : -0.900000 - 4 ( 0.000096%) -0.900000 : -0.800000 - 3 ( 0.000072%) -0.800000 : -0.700000 - 3 ( 0.000072%) -0.700000 : -0.600000 - 7 ( 0.000169%) -0.600000 : -0.500000 - 10 ( 0.000241%) -0.500000 : -0.400000 - 26 ( 0.000626%) -0.400000 : -0.300000 - 70 ( 0.001687%) -0.300000 : -0.200000 - 182 ( 0.004385%) -0.200000 : -0.100000 - 763 ( 0.018385%) -0.100000 : 0.000000 - 42440 ( 1.022631%) 0.000000 : 0.100000 - 4105684 ( 98.930237%) 0.100000 : 0.200000 - 593 ( 0.014289%) 0.200000 : 0.300000 - 167 ( 0.004024%) 0.300000 : 0.400000 - 58 ( 0.001398%) 0.400000 : 0.500000 - 36 ( 0.000867%) 0.500000 : 0.600000 - 14 ( 0.000337%) 0.600000 : 0.700000 - 4 ( 0.000096%) 0.700000 : 0.800000 - 9 ( 0.000217%) 0.800000 : 0.900000 - 2 ( 0.000048%) 0.900000 : 1.000000 - 1 ( 0.000024%) 1.000000 : 1.100000 - 1 ( 0.000024%) 1.100000 : 1.200000 - 1 ( 0.000024%) | | |
0.25x0.25 | Maximum difference = 1.139648 Minimum difference = -0.675537 Mean absolute difference = 0.000182 Median absolute difference = 0.000000 Standard deviation = 0.005373 RMS of differences = 0.005373 Percentage of points with absolute difference < 0.05 = 99.897% < 0.10 = 99.953% < 0.50 = 99.999% | -1.200000 : -1.100000 - 0 ( 0.000000%) -1.100000 : -1.000000 - 0 ( 0.000000%) -1.000000 : -0.900000 - 0 ( 0.000000%) -0.900000 : -0.800000 - 0 ( 0.000000%) -0.800000 : -0.700000 - 0 ( 0.000000%) -0.700000 : -0.600000 - 4 ( 0.000385%) -0.600000 : -0.500000 - 1 ( 0.000096%) -0.500000 : -0.400000 - 8 ( 0.000771%) -0.400000 : -0.300000 - 17 ( 0.001637%) -0.300000 : -0.200000 - 50 ( 0.004816%) -0.200000 : -0.100000 - 180 ( 0.017337%) -0.100000 : 0.000000 - 10962 ( 1.055825%) 0.000000 : 0.100000 - 1026794 ( 98.897557%) 0.100000 : 0.200000 - 142 ( 0.013677%) 0.200000 : 0.300000 - 44 ( 0.004238%) 0.300000 : 0.400000 - 20 ( 0.001926%) 0.400000 : 0.500000 - 9 ( 0.000867%) 0.500000 : 0.600000 - 4 ( 0.000385%) 0.600000 : 0.700000 - 1 ( 0.000096%) 0.700000 : 0.800000 - 3 ( 0.000289%) 0.800000 : 0.900000 - 0 ( 0.000000%) 0.900000 : 1.000000 - 0 ( 0.000000%) 1.000000 : 1.100000 - 0 ( 0.000000%) 1.100000 : 1.200000 - 1 ( 0.000096%) | | |
0.5x0.5 | Maximum difference = 0.535156 Minimum difference = -0.661621 Mean absolute difference = 0.000189 Median absolute difference = 0.000000 Standard deviation = 0.005269 RMS of differences = 0.005269 Percentage of points with absolute difference < 0.05 = 99.889% < 0.10 = 99.952% < 0.50 = 99.999% | -0.700000 : -0.600000 - 1 ( 0.000385%) -0.600000 : -0.500000 - 0 ( 0.000000%) -0.500000 : -0.400000 - 1 ( 0.000385%) -0.400000 : -0.300000 - 6 ( 0.002308%) -0.300000 : -0.200000 - 17 ( 0.006540%) -0.200000 : -0.100000 - 40 ( 0.015389%) -0.100000 : 0.000000 - 2821 ( 1.085334%) 0.000000 : 0.100000 - 256974 ( 98.866574%) 0.100000 : 0.200000 - 42 ( 0.016159%) 0.200000 : 0.300000 - 9 ( 0.003463%) 0.300000 : 0.400000 - 5 ( 0.001924%) 0.400000 : 0.500000 - 2 ( 0.000769%) 0.500000 : 0.600000 - 2 ( 0.000769%) 0.600000 : 0.700000 - 0 ( 0.000000%) | | |
1.0x1.0 | Maximum difference = 0.424805 Minimum difference = -0.413086 Mean absolute difference = 0.000183 Median absolute difference = 0.000000 Standard deviation = 0.005198 RMS of differences = 0.005198 Percentage of points with absolute difference < 0.05 = 99.902% < 0.10 = 99.954% < 0.50 = 100.000% | -0.500000 : -0.400000 - 1 ( 0.001535%) -0.400000 : -0.300000 - 0 ( 0.000000%) -0.300000 : -0.200000 - 3 ( 0.004604%) -0.200000 : -0.100000 - 7 ( 0.010743%) -0.100000 : 0.000000 - 704 ( 1.080417%) 0.000000 : 0.100000 - 64426 ( 98.873542%) 0.100000 : 0.200000 - 11 ( 0.016882%) 0.200000 : 0.300000 - 5 ( 0.007673%) 0.300000 : 0.400000 - 2 ( 0.003069%) 0.400000 : 0.500000 - 1 ( 0.001535%) | | |