Validation of ice thickness
Bulletin date: 2026-01-15
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 2026-01-15 | 0.452 | | -0.090 | | 0.190 |
| Week after 2026-01-15 | 0.448 | -0.060 | -0.070 | 0.200 | 0.180 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-01-15, BE |
0.196 |
0.764 |
0.77 |
0.885 |
0.477 |
| Week after 2026-01-15, FC |
0.136 |
0.793 |
0.761 |
0.823 |
0.534 |
| Week after 2026-01-15, BE |
0.155 |
0.803 |
0.773 |
0.848 |
0.694 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2026-01-15 | 1.338 | | -0.050 | | 0.190 |
|
| Week after 2026-01-15 | 1.347 | -0.050 | -0.060 | 0.220 | 0.210 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-01-15, BE |
0.069 |
0.959 |
0.924 |
0.914 |
0.94 |
0.908 |
| Week after 2026-01-15, FC |
0.025 |
0.912 |
0.933 |
0.917 |
0.897 |
0.974 |
| Week after 2026-01-15, BE |
0.048 |
0.915 |
0.957 |
0.946 |
0.919 |
1 |
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 2026-01-15, BE |
| =0m |
0 |
128 |
65 |
18 |
3 |
| 0 - 0.3m |
42 |
3217 |
1514 |
188 |
31 |
| 0.3 - 0.6m |
0 |
314 |
2584 |
1201 |
10 |
| 0.6 - 1m |
0 |
3 |
325 |
1446 |
88 |
| >1m |
0 |
0 |
2 |
96 |
53 |
| Week after 2026-01-15, FC |
| =0m |
0 |
115 |
54 |
19 |
3 |
| 0 - 0.3m |
0 |
2848 |
1031 |
192 |
22 |
| 0.3 - 0.6m |
0 |
542 |
2370 |
832 |
35 |
| 0.6 - 1m |
0 |
1 |
283 |
1041 |
143 |
| >1m |
0 |
0 |
12 |
223 |
143 |
| Week after 2026-01-15, BE |
| =0m |
0 |
93 |
54 |
18 |
3 |
| 0 - 0.3m |
0 |
2987 |
1096 |
178 |
21 |
| 0.3 - 0.6m |
0 |
426 |
2342 |
825 |
34 |
| 0.6 - 1m |
0 |
0 |
252 |
1175 |
157 |
| >1m |
0 |
0 |
6 |
111 |
131 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-01-15, BE |
| =0m |
0 |
16 |
4 |
9 |
0 |
0 |
| 0 - 1m |
0 |
8445 |
903 |
98 |
22 |
15 |
| 1 - 1.5m |
0 |
1085 |
8176 |
895 |
30 |
11 |
| 1.5 - 2m |
0 |
0 |
435 |
4968 |
976 |
8 |
| 2 - 2.5m |
0 |
0 |
0 |
314 |
2555 |
271 |
| >2.5m |
0 |
0 |
0 |
0 |
133 |
487 |
| Week after 2026-01-15, FC |
| =0m |
0 |
26 |
9 |
5 |
0 |
0 |
| 0 - 1m |
0 |
7058 |
1316 |
100 |
39 |
29 |
| 1 - 1.5m |
0 |
1083 |
9135 |
681 |
44 |
17 |
| 1.5 - 2m |
0 |
1 |
728 |
5112 |
618 |
16 |
| 2 - 2.5m |
0 |
0 |
0 |
508 |
2180 |
487 |
| >2.5m |
0 |
0 |
0 |
2 |
20 |
360 |
| Week after 2026-01-15, BE |
| =0m |
0 |
28 |
9 |
5 |
0 |
0 |
| 0 - 1m |
0 |
7400 |
1464 |
95 |
39 |
26 |
| 1 - 1.5m |
0 |
740 |
9169 |
660 |
31 |
19 |
| 1.5 - 2m |
0 |
0 |
546 |
5226 |
567 |
17 |
| 2 - 2.5m |
0 |
0 |
0 |
422 |
2252 |
477 |
| >2.5m |
0 |
0 |
0 |
0 |
12 |
370 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2026-01-15, model vs. merged CS3SMOS data
Week after 2026-01-15, model vs. merged CS3SMOS data
Week before 2026-01-15, model vs. SMOS data
Week after 2026-01-15, model vs. SMOS data
Week before 2026-01-15, model vs. altimetry data
Week after 2026-01-15, model vs. altimetry data
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