Validation of ice thickness
Bulletin date: 2025-12-18
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 2025-12-18 | 0.204 | | -0.090 | | 0.150 |
| Week after 2025-12-18 | 0.371 | -0.090 | -0.080 | 0.190 | 0.180 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-12-18, BE |
0.073 |
0.962 |
0.843 |
0.875 |
1 |
| Week after 2025-12-18, FC |
0.019 |
0.865 |
0.818 |
0.761 |
0.318 |
| Week after 2025-12-18, BE |
0.034 |
0.878 |
0.821 |
0.772 |
0.375 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-12-18 | 1.205 | | -0.060 | | 0.190 |
|
| Week after 2025-12-18 | 1.274 | -0.020 | -0.040 | 0.220 | 0.200 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-18, BE |
0 |
0.958 |
0.972 |
0.941 |
0.921 |
0.991 |
| Week after 2025-12-18, FC |
0 |
0.925 |
0.943 |
0.885 |
0.834 |
0.917 |
| Week after 2025-12-18, BE |
0 |
0.931 |
0.958 |
0.924 |
0.875 |
0.958 |
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 2025-12-18, BE |
| =0m |
0 |
267 |
32 |
2 |
0 |
| 0 - 0.3m |
0 |
2204 |
173 |
21 |
1 |
| 0.3 - 0.6m |
0 |
15 |
70 |
40 |
2 |
| 0.6 - 1m |
0 |
0 |
4 |
3 |
1 |
| >1m |
0 |
0 |
0 |
0 |
1 |
| Week after 2025-12-18, FC |
| =0m |
0 |
668 |
94 |
10 |
6 |
| 0 - 0.3m |
5 |
4171 |
1308 |
118 |
20 |
| 0.3 - 0.6m |
0 |
391 |
2110 |
577 |
28 |
| 0.6 - 1m |
0 |
58 |
271 |
846 |
103 |
| >1m |
0 |
0 |
11 |
26 |
7 |
| Week after 2025-12-18, BE |
| =0m |
0 |
399 |
49 |
10 |
6 |
| 0 - 0.3m |
5 |
4455 |
1319 |
118 |
20 |
| 0.3 - 0.6m |
0 |
363 |
2159 |
571 |
26 |
| 0.6 - 1m |
0 |
71 |
255 |
858 |
104 |
| >1m |
0 |
0 |
12 |
20 |
8 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-18, BE |
| =0m |
0 |
55 |
6 |
3 |
0 |
0 |
| 0 - 1m |
0 |
13741 |
1609 |
112 |
19 |
8 |
| 1 - 1.5m |
0 |
152 |
6578 |
642 |
20 |
7 |
| 1.5 - 2m |
0 |
0 |
356 |
4152 |
664 |
10 |
| 2 - 2.5m |
0 |
0 |
0 |
387 |
2151 |
274 |
| >2.5m |
0 |
0 |
0 |
0 |
36 |
507 |
| Week after 2025-12-18, FC |
| =0m |
0 |
20 |
5 |
0 |
3 |
0 |
| 0 - 1m |
0 |
9125 |
1742 |
83 |
22 |
17 |
| 1 - 1.5m |
0 |
534 |
6891 |
662 |
65 |
20 |
| 1.5 - 2m |
0 |
0 |
949 |
4190 |
321 |
27 |
| 2 - 2.5m |
0 |
0 |
0 |
758 |
1669 |
227 |
| >2.5m |
0 |
0 |
0 |
0 |
93 |
488 |
| Week after 2025-12-18, BE |
| =0m |
0 |
15 |
5 |
0 |
3 |
0 |
| 0 - 1m |
0 |
9330 |
1796 |
70 |
19 |
15 |
| 1 - 1.5m |
0 |
334 |
7064 |
634 |
61 |
22 |
| 1.5 - 2m |
0 |
0 |
722 |
4334 |
262 |
12 |
| 2 - 2.5m |
0 |
0 |
0 |
655 |
1767 |
213 |
| >2.5m |
0 |
0 |
0 |
0 |
61 |
517 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-12-18, model vs. merged CS3SMOS data
Week after 2025-12-18, model vs. merged CS3SMOS data
Week before 2025-12-18, model vs. SMOS data
Week after 2025-12-18, model vs. SMOS data
Week before 2025-12-18, model vs. altimetry data
Week after 2025-12-18, model vs. altimetry data
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