Validation of ice thickness
Bulletin date: 2025-12-11
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 2025-12-11 | 0.416 | | -0.080 | | 0.170 |
| Week after 2025-12-11 | 0.204 | -0.090 | -0.090 | 0.150 | 0.150 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-12-11, BE |
0.2 |
0.877 |
0.785 |
0.864 |
0.833 |
| Week after 2025-12-11, FC |
0.087 |
0.959 |
0.83 |
0.929 |
1 |
| Week after 2025-12-11, BE |
0.073 |
0.962 |
0.843 |
0.875 |
1 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-12-11 | 1.294 | | -0.070 | | 0.170 |
|
| Week after 2025-12-11 | 1.205 | -0.060 | -0.060 | 0.200 | 0.190 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-11, BE |
0.077 |
0.94 |
0.965 |
0.945 |
0.941 |
0.929 |
| Week after 2025-12-11, FC |
0 |
0.957 |
0.955 |
0.891 |
0.85 |
0.986 |
| Week after 2025-12-11, BE |
0 |
0.958 |
0.972 |
0.941 |
0.921 |
0.991 |
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 2025-12-11, BE |
| =0m |
0 |
229 |
44 |
20 |
2 |
| 0 - 0.3m |
0 |
3390 |
868 |
165 |
10 |
| 0.3 - 0.6m |
0 |
155 |
1946 |
795 |
17 |
| 0.6 - 1m |
0 |
15 |
249 |
1232 |
80 |
| >1m |
0 |
0 |
0 |
2 |
4 |
| Week after 2025-12-11, FC |
| =0m |
0 |
409 |
28 |
2 |
0 |
| 0 - 0.3m |
0 |
2048 |
171 |
21 |
1 |
| 0.3 - 0.6m |
0 |
29 |
74 |
36 |
2 |
| 0.6 - 1m |
0 |
0 |
6 |
7 |
1 |
| >1m |
0 |
0 |
0 |
0 |
1 |
| Week after 2025-12-11, 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 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-11, BE |
| =0m |
0 |
28 |
9 |
2 |
0 |
0 |
| 0 - 1m |
0 |
9275 |
1470 |
54 |
10 |
2 |
| 1 - 1.5m |
0 |
183 |
5879 |
548 |
17 |
0 |
| 1.5 - 2m |
0 |
0 |
248 |
4237 |
854 |
2 |
| 2 - 2.5m |
0 |
0 |
0 |
215 |
1935 |
315 |
| >2.5m |
0 |
0 |
0 |
8 |
100 |
328 |
| Week after 2025-12-11, FC |
| =0m |
0 |
66 |
6 |
3 |
0 |
0 |
| 0 - 1m |
0 |
13577 |
1534 |
116 |
19 |
8 |
| 1 - 1.5m |
0 |
305 |
6506 |
725 |
20 |
7 |
| 1.5 - 2m |
0 |
0 |
503 |
3951 |
882 |
18 |
| 2 - 2.5m |
0 |
0 |
0 |
499 |
1939 |
364 |
| >2.5m |
0 |
0 |
0 |
2 |
30 |
409 |
| Week after 2025-12-11, 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 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-12-11, model vs. merged CS3SMOS data
Week after 2025-12-11, model vs. merged CS3SMOS data
Week before 2025-12-11, model vs. SMOS data
Week after 2025-12-11, model vs. SMOS data
Week before 2025-12-11, model vs. altimetry data
Week after 2025-12-11, model vs. altimetry data
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