Svalbard

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Sea Ice Validation:
• Greenland
• Svalbard
• Southern Hemisphere
• LowRes Ice Drift

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 95.18 96.52 -1.74 6.58 226158

Validation table updated at: 2019.01.20 16:14 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 97.91 1.33 0.76 15.46 408788

Validation table updated at: 2019.01.20 16:14 UTC

Updated December 1. 2018 - Webmaster Steinar Eastwood