Validation of ice thickness
Bulletin date: 2026-01-29
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 2026-01-29 | 0.473 | | -0.060 | | 0.180 |
| Week after 2026-01-29 | 0.478 | -0.040 | -0.040 | 0.190 | 0.190 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-01-29, BE |
0.055 |
0.857 |
0.81 |
0.869 |
0.754 |
| Week after 2026-01-29, FC |
0.15 |
0.849 |
0.791 |
0.841 |
0.558 |
| Week after 2026-01-29, BE |
0.128 |
0.859 |
0.82 |
0.855 |
0.603 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2026-01-29 | 1.439 | | -0.080 | | 0.190 |
|
| Week after 2026-01-29 | 1.452 | -0.070 | -0.070 | 0.230 | 0.210 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-01-29, BE |
0 |
0.896 |
0.951 |
0.928 |
0.916 |
1 |
| Week after 2026-01-29, FC |
0.053 |
0.869 |
0.942 |
0.837 |
0.841 |
0.953 |
| Week after 2026-01-29, BE |
0.02 |
0.903 |
0.957 |
0.879 |
0.884 |
0.99 |
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 2026-01-29, BE |
| =0m |
0 |
95 |
40 |
20 |
10 |
| 0 - 0.3m |
4 |
2977 |
880 |
152 |
22 |
| 0.3 - 0.6m |
0 |
433 |
2236 |
709 |
23 |
| 0.6 - 1m |
0 |
11 |
410 |
1605 |
130 |
| >1m |
0 |
2 |
4 |
187 |
270 |
| Week after 2026-01-29, FC |
| =0m |
0 |
169 |
48 |
25 |
5 |
| 0 - 0.3m |
1 |
2721 |
799 |
123 |
31 |
| 0.3 - 0.6m |
0 |
440 |
2189 |
718 |
30 |
| 0.6 - 1m |
0 |
11 |
523 |
1605 |
121 |
| >1m |
0 |
3 |
28 |
268 |
266 |
| Week after 2026-01-29, BE |
| =0m |
0 |
115 |
46 |
24 |
3 |
| 0 - 0.3m |
1 |
2874 |
805 |
119 |
32 |
| 0.3 - 0.6m |
0 |
344 |
2242 |
690 |
27 |
| 0.6 - 1m |
0 |
9 |
475 |
1673 |
131 |
| >1m |
0 |
2 |
19 |
233 |
260 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-01-29, BE |
| =0m |
0 |
27 |
11 |
3 |
1 |
0 |
| 0 - 1m |
0 |
6144 |
1753 |
89 |
7 |
11 |
| 1 - 1.5m |
0 |
513 |
9288 |
959 |
30 |
16 |
| 1.5 - 2m |
0 |
2 |
362 |
4906 |
864 |
11 |
| 2 - 2.5m |
0 |
3 |
0 |
295 |
2612 |
658 |
| >2.5m |
0 |
0 |
0 |
0 |
14 |
926 |
| Week after 2026-01-29, FC |
| =0m |
0 |
41 |
12 |
3 |
0 |
1 |
| 0 - 1m |
1 |
5965 |
1876 |
86 |
34 |
21 |
| 1 - 1.5m |
0 |
458 |
9561 |
1346 |
44 |
23 |
| 1.5 - 2m |
0 |
27 |
931 |
4617 |
853 |
40 |
| 2 - 2.5m |
0 |
0 |
2 |
724 |
2222 |
609 |
| >2.5m |
0 |
0 |
2 |
0 |
129 |
1135 |
| Week after 2026-01-29, BE |
| =0m |
0 |
33 |
13 |
3 |
0 |
1 |
| 0 - 1m |
1 |
6056 |
1575 |
80 |
34 |
20 |
| 1 - 1.5m |
0 |
379 |
10115 |
1245 |
35 |
17 |
| 1.5 - 2m |
0 |
23 |
677 |
4871 |
711 |
38 |
| 2 - 2.5m |
0 |
0 |
4 |
577 |
2435 |
563 |
| >2.5m |
0 |
0 |
0 |
0 |
67 |
1190 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2026-01-29, model vs. merged CS3SMOS data
Week after 2026-01-29, model vs. merged CS3SMOS data
Week before 2026-01-29, model vs. SMOS data
Week after 2026-01-29, model vs. SMOS data
Week before 2026-01-29, model vs. altimetry data
Week after 2026-01-29, model vs. altimetry data
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