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    Your location: OSI SAF HL / Validation / Svalbard  
       
      The Sea Ice service at met.no produce daily ice charts covering the Fram Strait to the Barents Sea with main emphasize on the areas around Svalbard. Areas where independent information (manual inspection of SAR, MODIS and AVHRR) are utilized are marked by the ice service. These are then collocated with the OSI SAF ice product. The focus is on areas close to the ice edge. Example of a used area is given in the figure below. To the left (1) a daily Sea Ice service product is show, to the right (2) a polygon with validation data from the same product is shown. Click at the image to enlarge.

Below tables with results from comparing the OSI SAF ice concentration and ice edge products are given. These validation resuls are representing areas close to the ice edge. Areas further into the Artic ice have not been included. Including these areas would have increased the validation "score". The validation results show the relative performance in the areas close to the ice edge and for example illustrates the problems finding the ice edge during late summer.

Validation results for Sea Ice Concentration product

OSI SAF Sea Ice Concentration product compared with met.no Ice Service (OSISAF - Ice service)
Source: oper , Product area: nh
Year Month Match +/- 10% (%) Match +/- 20% (%) Bias Std dev Num compared
2014 11 72.06 87.50 -4.87 11.99 6306
2014 12 77.91 88.69 -3.73 12.70 39777
2015 01 84.08 91.98 -0.83 10.36 19497
2015 02 81.75 92.19 nan nan 30523
2015 03 82.37 93.04 -1.44 9.91 68879
2015 04 81.65 92.33 -2.41 9.45 51446
2015 05 87.79 95.11 -0.54 8.22 53023
2015 06 83.87 93.02 -2.03 8.83 62027
2015 07 75.07 89.31 -5.13 11.11 83345
2015 08 82.76 86.75 -4.83 12.29 114501
2015 09 93.24 96.17 -0.80 6.69 154481
2015 10 93.00 96.91 -0.49 5.82 65428
2015 11 85.97 94.15 -2.44 8.04 100600
2015 12 86.03 93.59 -2.82 8.84 83119
2016 01 83.72 92.18 -2.71 9.92 93146
2016 02 83.68 91.58 -3.26 10.22 111214
2016 03 80.21 88.57 -1.74 12.86 104517
2016 04 78.95 88.18 -2.12 11.62 101317
2016 05 74.68 86.85 -5.92 11.71 106914
2016 06 72.15 82.24 -7.42 14.75 72043
2016 07 72.42 81.35 -8.42 14.55 71189
2016 08 81.88 88.25 -4.92 11.48 64542
2016 09 82.01 88.64 -1.29 14.04 71863
2016 10 91.15 96.12 -1.81 7.20 48097
2016 11 82.15 92.14 -3.89 9.87 93366
2016 12 79.79 89.76 -4.94 10.70 83163
2017 01 76.66 87.93 -5.66 11.36 73950
2017 02 81.23 91.13 -4.06 10.06 41194
2017 03 85.65 93.80 -2.71 8.75 122590
2017 04 85.09 93.40 -3.00 9.57 96081
2017 05 79.88 91.33 -4.43 10.59 62653

Validation table updated at: 2017.05.24 16:10 UTC

Validation results for Sea Ice Edge product

OSI SAF Sea Ice Edge product compared with met.no Ice Service (OSISAF - Ice service)
Source: oper , Product area: nh
Year Month Match (%) OSI SAF underestimates OSI SAF overestimates Mean edge difference (km) Num compared
2014 11 94.14 5.25 0.61 13.71 6875
2014 12 95.18 1.96 2.86 11.67 43975
2015 01 96.61 1.55 1.84 11.67 21003
2015 02 95.87 1.60 2.53 11.55 34127
2015 03 96.62 0.84 2.54 10.24 76087
2015 04 97.43 1.22 1.36 16.74 54643
2015 05 98.19 0.48 1.33 13.30 57395
2015 06 97.99 0.77 1.25 13.81 66258
2015 07 97.53 1.48 0.99 13.38 87067
2015 08 96.38 2.54 1.08 22.12 119607
2015 09 98.33 0.80 0.87 14.68 152642
2015 10 98.53 0.58 0.89 12.67 54048
2015 11 97.79 1.20 1.01 13.57 107359
2015 12 97.66 1.26 1.08 12.46 90118
2016 01 96.56 1.73 1.71 13.10 100992
2016 02 96.70 1.37 1.93 14.74 120349
2016 03 94.43 2.08 3.49 17.25 113551
2016 04 96.92 1.53 1.56 16.50 109945
2016 05 96.75 1.65 1.60 13.78 115467
2016 06 95.07 3.56 1.36 21.04 77826
2016 07 95.87 3.49 0.64 20.93 74479
2016 08 97.24 2.31 0.45 33.82 67857
2016 09 94.87 1.58 3.55 22.82 76774
2016 10 98.34 0.57 1.10 11.20 60526
2016 11 97.40 1.48 1.13 12.56 101715
2016 12 96.43 2.36 1.21 15.88 86129
2017 01 95.86 2.84 1.30 16.84 80667
2017 02 96.75 1.60 1.65 12.32 44942
2017 03 97.73 1.08 1.20 11.29 125250
2017 04 97.37 1.64 0.99 16.30 104271
2017 05 97.62 1.25 1.13 14.29 68149

Validation table updated at: 2017.05.24 16:10 UTC

   
       
     

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