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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 |
| 2018 04 | 94.82 | 96.94 | -1.63 | 6.63 | 165068 |
| 2018 05 | 95.33 | 96.33 | -1.76 | 7.17 | 352512 |
| 2018 06 | 93.64 | 94.71 | -2.33 | 8.27 | 462608 |
| 2018 07 | 92.20 | 93.21 | -3.34 | 11.08 | 530629 |
| 2018 08 | 96.32 | 97.01 | -1.32 | 6.43 | 591009 |
| 2018 09 | 98.09 | 98.61 | -0.72 | 4.46 | 495207 |
| 2018 10 | 98.97 | 99.33 | -0.37 | 2.82 | 582221 |
| 2018 11 | 98.22 | 98.79 | -0.63 | 3.57 | 484838 |
| 2018 12 | 97.25 | 98.10 | -0.99 | 4.60 | 347249 |
| 2019 01 | 95.84 | 97.05 | -1.56 | 6.21 | 353016 |
| 2019 02 | 96.58 | 97.73 | -1.32 | 5.86 | 299310 |
| 2019 03 | 96.06 | 97.11 | -1.44 | 5.68 | 265844 |
| 2019 04 | 94.61 | 95.90 | -1.94 | 7.15 | 273258 |
| 2019 05 | 94.95 | 96.06 | -1.69 | 6.57 | 255681 |
| 2019 06 | 93.43 | 94.82 | -2.28 | 7.65 | 263748 |
| 2019 07 | 95.67 | 96.73 | -1.55 | 6.55 | 444495 |
| 2019 08 | 96.57 | 97.48 | -1.32 | 6.05 | 513778 |
| 2019 09 | 97.30 | 97.90 | -0.97 | 5.25 | 533137 |
| 2019 10 | 98.25 | 98.80 | -0.64 | 4.11 | 554373 |
| 2019 11 | 97.81 | 98.55 | -0.90 | 4.76 | 410550 |
| 2019 12 | 97.18 | 98.07 | -1.14 | 5.61 | 321765 |
| 2020 01 | 96.41 | 97.51 | -1.38 | 6.03 | 322624 |
| 2020 02 | 95.52 | 96.80 | -1.80 | 7.01 | 246571 |
Validation table updated at: 2020.02.22 16:13 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 |
| 2018 04 | 98.36 | 1.07 | 0.57 | 11.53 | 303476 |
| 2018 05 | 97.77 | 1.19 | 1.04 | 14.05 | 620309 |
| 2018 06 | 97.70 | 1.64 | 0.66 | 24.86 | 699951 |
| 2018 07 | 94.85 | 4.96 | 0.19 | 33.00 | 704245 |
| 2018 08 | 98.32 | 1.24 | 0.44 | 27.93 | 717898 |
| 2018 09 | 99.19 | 0.33 | 0.48 | 20.69 | 600476 |
| 2018 10 | 99.29 | 0.17 | 0.54 | 9.86 | 739303 |
| 2018 11 | 98.73 | 0.69 | 0.58 | 12.48 | 650385 |
| 2018 12 | 98.19 | 0.77 | 1.04 | 12.94 | 554406 |
| 2019 01 | 98.12 | 1.15 | 0.73 | 13.52 | 657046 |
| 2019 02 | 97.94 | 1.01 | 1.05 | 10.82 | 611697 |
| 2019 03 | 97.91 | 1.25 | 0.84 | 16.31 | 563106 |
| 2019 04 | 97.59 | 1.43 | 0.99 | 17.75 | 564863 |
| 2019 05 | 97.98 | 1.05 | 0.97 | 18.08 | 491884 |
| 2019 06 | 96.95 | 2.20 | 0.85 | 20.18 | 470181 |
| 2019 07 | 97.32 | 2.07 | 0.61 | 17.10 | 637662 |
| 2019 08 | 98.09 | 1.34 | 0.57 | 16.50 | 680310 |
| 2019 09 | 98.87 | 0.67 | 0.46 | 19.02 | 664994 |
| 2019 10 | 98.96 | 0.37 | 0.67 | 10.09 | 725620 |
| 2019 11 | 98.32 | 0.68 | 1.00 | 9.53 | 660968 |
| 2019 12 | 98.48 | 0.78 | 0.74 | 10.61 | 573464 |
| 2020 01 | 98.14 | 1.05 | 0.81 | 12.19 | 630529 |
| 2020 02 | 97.34 | 1.87 | 0.79 | 15.06 | 484411 |
Validation table updated at: 2020.02.22 16:13 UTC
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