Validation of ice thickness
Bulletin date: 2026-02-19
Model: ARC MFC - TOPAZ
Data source: CMEMS CS3SMOS
Validation statistics summary
Statistics | Contingency tables | Maps
| SMOS |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
| Week before 2026-02-19 | 0.443 | | -0.040 | | 0.180 |
| Week after 2026-02-19 | 0.625 | -0.030 | -0.030 | 0.230 | 0.220 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-02-19, BE |
0.122 |
0.852 |
0.865 |
0.849 |
0.51 |
| Week after 2026-02-19, FC |
0.246 |
0.77 |
0.804 |
0.846 |
0.703 |
| Week after 2026-02-19, BE |
0.286 |
0.778 |
0.834 |
0.86 |
0.723 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2026-02-19 | 1.393 | | -0.050 | | 0.210 |
|
| Week after 2026-02-19 | 1.516 | -0.020 | -0.030 | 0.210 | 0.200 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-02-19, BE |
0.062 |
0.928 |
0.966 |
0.958 |
0.926 |
0.896 |
| Week after 2026-02-19, FC |
0.073 |
0.887 |
0.946 |
0.904 |
0.878 |
0.951 |
| Week after 2026-02-19, BE |
0.065 |
0.905 |
0.954 |
0.945 |
0.938 |
0.979 |
Sea ice thickness contingency tables
Statistics | Contingency tables | Maps
| SMOS |
Observed →
Modeled ↓ | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-02-19, BE |
| =0m |
0 |
32 |
24 |
16 |
2 |
| 0 - 0.3m |
2 |
1651 |
593 |
135 |
18 |
| 0.3 - 0.6m |
0 |
273 |
1379 |
277 |
11 |
| 0.6 - 1m |
0 |
1 |
331 |
1028 |
47 |
| >1m |
0 |
0 |
0 |
31 |
20 |
| Week after 2026-02-19, FC |
| =0m |
4 |
95 |
45 |
25 |
6 |
| 0 - 0.3m |
1 |
1444 |
797 |
294 |
41 |
| 0.3 - 0.6m |
0 |
541 |
2265 |
920 |
72 |
| 0.6 - 1m |
0 |
38 |
783 |
2703 |
378 |
| >1m |
0 |
0 |
78 |
565 |
1039 |
| Week after 2026-02-19, BE |
| =0m |
3 |
61 |
39 |
25 |
5 |
| 0 - 0.3m |
2 |
1518 |
774 |
279 |
41 |
| 0.3 - 0.6m |
0 |
507 |
2216 |
731 |
63 |
| 0.6 - 1m |
0 |
32 |
871 |
2939 |
380 |
| >1m |
0 |
0 |
68 |
533 |
1047 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-02-19, BE |
| =0m |
0 |
48 |
14 |
3 |
0 |
0 |
| 0 - 1m |
0 |
7900 |
1884 |
95 |
19 |
10 |
| 1 - 1.5m |
0 |
843 |
10823 |
858 |
19 |
8 |
| 1.5 - 2m |
0 |
29 |
677 |
5737 |
257 |
4 |
| 2 - 2.5m |
0 |
0 |
4 |
606 |
2588 |
248 |
| >2.5m |
0 |
0 |
0 |
0 |
303 |
1309 |
| Week after 2026-02-19, FC |
| =0m |
0 |
40 |
10 |
4 |
1 |
0 |
| 0 - 1m |
0 |
3391 |
1002 |
69 |
30 |
7 |
| 1 - 1.5m |
0 |
697 |
9551 |
934 |
89 |
12 |
| 1.5 - 2m |
0 |
22 |
1038 |
5406 |
298 |
21 |
| 2 - 2.5m |
0 |
0 |
0 |
764 |
2696 |
194 |
| >2.5m |
0 |
0 |
0 |
0 |
250 |
1247 |
| Week after 2026-02-19, BE |
| =0m |
0 |
31 |
10 |
4 |
1 |
0 |
| 0 - 1m |
0 |
3477 |
870 |
60 |
26 |
7 |
| 1 - 1.5m |
0 |
622 |
10046 |
938 |
88 |
10 |
| 1.5 - 2m |
0 |
20 |
675 |
5702 |
302 |
21 |
| 2 - 2.5m |
0 |
0 |
0 |
473 |
2759 |
179 |
| >2.5m |
0 |
0 |
0 |
0 |
188 |
1264 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2026-02-19, model vs. merged CS3SMOS data
Week after 2026-02-19, model vs. merged CS3SMOS data
Week before 2026-02-19, model vs. SMOS data
Week after 2026-02-19, model vs. SMOS data
Week before 2026-02-19, model vs. altimetry data
Week after 2026-02-19, model vs. altimetry data
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