HRES O1280
EMOSLIB does not apply any land sea-mask processing when interpolating the mean sea-level pressure so differences arise only from the different interpolation method and selection of nearest points used by MIR
HRES O1280
Mean sea-level pressure has been interpolated from the O1280 octahedral reduced Gaussian grid to regular lat-lon grids at different target resolutions using EMOSLIB and MIR.
- The differences for more than 99% of grid points are less than 20Pa and in the cases presented here all differences are less than 1 hPa.
- The largest differences occur in regions of high orography with the field gradient changes most rapidly.
- Larger differences are also seen in the lower resolution target grids (0.5ºx0.5º and 1.0ºx1.0º) at the polar latitudes (90ºN and 90ºS) which arise from the different handling of the interpolation at the poles.
The plots show the differences with the contours chosen on a logarithmic scale to enhance the smaller differences. Differences smaller than 0.1% of the field range are not shown. Grid points where the absolute difference is greater than 50% of the maximum absolute difference are indicated with red (EMOSLIB greater than MIR) and blue (EMOSLIB less than MIR) filled circles.
Target resolution | Statistics of differences | Histogram of differences | Global | Europe |
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0.1x0.1 | Maximum difference = 68.125000 Minimum difference = -91.375000 Average difference = -0.000294 Mean Mean absolute difference = - 0.000294312304 Median absolute difference = - 0.125000 Standard deviation = 1.072257 Variance RMS of differences = 1.149734072257RMS of differences = 1.072257 Percentage of points with absolute difference < 1.0 = 95.306% < 2.0 = 97.828% < 10.0 = 99.743% | -100.0 : -90.0 - 1 ( 0.000015%) -90.0 : -80.0 - 0 ( 0.000000%) -80.0 : -70.0 -91.375000 : -73.100000 - 1 ( 0.000015%) -7370.100000 0 : -5460.825000 0 - 9 5 ( 0.000139%000077%) -5460.825000 0 : -3650.550000 0 - 80 12 ( 0.001234%000185%) -50.0 : -40.0 - 36 .550000 : -18.275000 - 996 ( 0.000555%) -40.0 : -30.0 - 153 ( 0.002360%) -30.0 : -20.0 - 638 ( 0.015362%009840%) -1820.275000 : 0.000000 - 3302198 ( 50.931550%) 0.000000 : 18.275000 - 3179303 ( 49.036076%) 18.275000 : 36.550000 - 932 ( 0.014375%) 6.550000 : 54.825000 - 72 ( 0.001110%) 54.825000 : 73.100000 - 9 ( 0.000139%) 73.100000 : 91.375000 0 : -10.0 - 7583 ( 0.116957%) -10.0 : 0.0 - 3294855 ( 50.818295%) 0.0 : 10.0 - 3172050 ( 48.924209%) 10.0 : 20.0 - 7478 ( 0.115337%) 20.0 : 30.0 - 603 ( 0.009300%) 30.0 : 40.0 - 121 ( 0.001866%) 40.0 : 50.0 - 49 ( 0.000756%) 50.0 : 60.0 - 13 ( 0.000201%) 60.0 : 70.0 - 2 ( 0.000031%) 70.0 : 80.0 - 0 ( 0.000000%) 80.0 : 90.0 - 0 ( 0.000000%) 90.0 : 100.0 - 0 ( 0.000000%) | Image RemovedImage Added | |
0.125x0.125 | Maximum difference = 92.937500 Minimum difference = -80.062500 Average difference = -0.000149 Mean Mean absolute difference = - 0.000149297040 Median absolute difference = - 0.062500 Standard deviation = 1.112258 Variance RMS of differences = 1.237119112258RMS of differences = 1.112258 Percentage of points with absolute difference < 1.0 = 95.244% < 2.0 = 97.784% < 10.0 = 99.717% | -100.0 : -90.0 - 0 ( 0.000000%) -90.0 : -80.0 -92.937500 : -74.350000 - 1 ( 0.000024%) -80.0 : -70.0 - 3 ( 0.000072%) -70.0 : -60.0 - 10 ( 0.000241%) -74.350000 : -55.762500 - 13 -60.0 : -50.0 - 7 ( 0.000169%) -50.0 : -40.0 - 26 ( 0.000313%000626%) -5540.762500 0 : -3730.175000 0 - 49 84 ( 0.001181%002024%) -3730.175000 0 : -1820.587500 0 - 563 387 ( 0.009325%) -20.0 : -10.0 - 5446 ( 0.013566%131226%) -1810.587500 0 : 0.000000 0 - 2867529 2862191 ( 6968.095752%967128%) 0.000000 0 : 1810.587500 0 - 1281313 1276136 ( 30.874417%749672%) 18 10.587500 : 37.175000 - 556 0 : 20.0 - 5303 ( 0.127781%) 20.0 : 30.0 - 362 ( 0.013397%008723%) 37 30.175000 : 55.762500 - 46 0 : 40.0 - 81 ( 0.001952%) 40.0 : 50.0 - 28 ( 0.000675%) 50.0 : 60.0 - 9 ( 0.000217%) 60.0 : 70.0 - 2 ( 0.001108%000048%) 55 70.762500 : 74.350000 - 6 0 : 80.0 - 3 ( 0.000072%) 80.0 : 90.0 - 0 ( 0.000145%000000%) 74 90.350000 0 : 92100.937500 0 - 4 1 ( 0.000096%000024%) | Image RemovedImage Added | |
0.25x0.25 | Maximum difference = 92.875000 Minimum difference = -61.875000 Average difference = 0.000752 Mean absolute difference = 0.000752338583 Median absolute difference = - 0.125000 Standard deviation = 1.266861 Variance RMS of differences = 1.604937266861RMS of differences = 1.266861 Percentage of points with absolute difference < 1.0 = 95.149% < 2.0 = 97.663% < 10.0 = 99.580% | -100.0 : -90.0 - 0 ( 0.000000%) -90.0 : -80.0 - 0 ( 0.000000%) -80.0 : -70.0 -92.875000 : -74.300000 - 0 ( 0.000000%) -70.0 : -60.0 - 4 ( 0.000385%) -7460.300000 0 : -5550.725000 0 - 4 ( 0.000385%) -50.0 : -40.0 - 6 ( 0.000578%) -5540.725000 0 : -3730.150000 0 - 12 15 ( 0.001156%001445%) -3730.150000 0 : -1820.575000 0 - 150 101 ( 0.009728%) -20.0 : -10.0 - 2043 ( 0.014448%196775%) -1810.575000 0 : 0.000000 0 - 529369 527362 ( 50.987151%793843%) 0.000000 0 : 1810.575000 0 - 508549 506516 ( 48.981835%) 18.575000 : 37.150000 - 141 .786022%) 10.0 : 20.0 - 2066 ( 0.198991%) 20.0 : 30.0 - 93 ( 0.013581%008957%) 37 30.150000 0 : 5540.725000 - 12 0 - 19 ( 0.001830%) 40.0 : 50.0 - 6 ( 0.000578%) 50.0 : 60.0 - 2 ( 0.000193%) 60.0 : 70.0 - 1 ( 0.001156%000096%) 55 70.725000 0 : 7480.300000 0 - 1 ( 0.000096%) 74.300000 : 92.875000 - 2 80.0 : 90.0 - 0 ( 0.000000%) 90.0 : 100.0 - 1 ( 0.000193%000096%) | Image RemovedImage Added | |
0.5x0.5 | Maximum difference = 51.000000 Minimum difference = -61.000000 Average difference = 0.004363 Mean absolute difference = 0.004363309541 Median absolute difference = 0.000000 Standard deviation = 1.523147 Variance = 2.319977 RMS of differences = 1.523153 Percentage of points with absolute difference < 1.0 = 94.304% < 2.0 = 97.268% < 10.0 = 99.306% | -70.0 : -60.0 - 2 ( 0.000769%) -60.0 : -50.0 - 1 ( 0.000385%) -6150.000000 0 : -4840.800000 0 - 3 1 ( 0.001154%000385%) -4840.800000 0 : -3630.600000 0 - 2 3 ( 0.000769%001154%) -3630.600000 0 : -2420.400000 0 - 13 21 ( 0.005002%008079%) -2420.400000 0 : -1210.200000 0 - 818 855 ( 0.314712%328947%) -1210.200000 0 : 0.000000 0 - 41933 41886 ( 16.133041%114958%) 0.000000 0 : 1210.200000 0 - 216306 216238 ( 83.220222%194060%) 12 10.200000 0 : 2420.400000 0 - 825 871 ( 0.317405%335103%) 24 20.400000 0 : 3630.600000 0 - 15 33 ( 0.012696%) 30.0 : 40.0 - 6 ( 0.005771%002308%) 36 40.600000 0 : 4850.800000 0 - 4 2 ( 0.001539%000769%) 48 50.800000 0 : 6160.000000 0 - 1 ( 0.000385%) 60.0 : 70.0 - 0 ( 0.000000%) | Image AddedImage Removed | |
1.0x1.0 | Maximum difference = 50.937500 Minimum difference = -60.812500 Average difference = 0.012001 Mean absolute difference = 0.012001437874 Median absolute difference = - 0.062500 Standard deviation = 1.932739 Variance = 3.735481 RMS of differences = 1.932777 Percentage of points with absolute difference < 1.0 = 94.672% < 2.0 = 96.980% < 10.0 = 98.766% | -70.0 : -60.0 -60.812500 : -48.650000 - 1 ( 0.001535%) -48.650000 : -36.487500 -60.0 : -50.0 - 0 ( 0.000000%) -50.0 : -40.0 - 0 ( 0.000000%) -3640.487500 0 : -2430.325000 0 - 0 ( 0.000000%) -24.325000 : -12.162500 - 382 30.0 : -20.0 - 2 ( 0.003069%) -20.0 : -10.0 - 389 ( 0.586249%596992%) -1210.162500 0 : 0.000000 0 - 44628 44619 ( 68.489871%476059%) 0.000000 0 : 1210.162500 0 - 19754 19737 ( 30.316145%290055%) 12 10.162500 0 : 2420.325000 0 - 388 401 ( 0.595457%615408%) 24.325000 : 36.487500 - 6 20.0 : 30.0 - 9 ( 0.013812%) 30.0 : 40.0 - 1 ( 0.009208%001535%) 36 40.487500 0 : 4850.650000 0 - 0 ( 0.000000%) 48 50.650000 0 : 60.812500 0 - 1 ( 0.001535%) 60.0 : 70.0 - 0 ( 0.000000%) | Image RemovedImage Added | |