Validation of ice thickness
Bulletin date: 2025-11-27
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 2025-11-27 | 0.409 | | -0.130 | | 0.180 |
| Week after 2025-11-27 | 0.410 | -0.130 | -0.130 | 0.210 | 0.200 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-11-27, BE |
0.282 |
0.746 |
0.643 |
0.976 |
1 |
| Week after 2025-11-27, FC |
0.169 |
0.748 |
0.765 |
0.918 |
1 |
| Week after 2025-11-27, BE |
0.199 |
0.74 |
0.763 |
0.939 |
1 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-11-27 | 1.281 | | -0.040 | | 0.170 |
|
| Week after 2025-11-27 | 1.306 | -0.050 | -0.060 | 0.170 | 0.160 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-11-27, BE |
0.028 |
0.948 |
0.943 |
0.942 |
0.921 |
0.792 |
| Week after 2025-11-27, FC |
0 |
0.945 |
0.93 |
0.912 |
0.925 |
0.946 |
| Week after 2025-11-27, BE |
0.033 |
0.954 |
0.951 |
0.931 |
0.944 |
0.967 |
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 2025-11-27, BE |
| =0m |
0 |
220 |
54 |
16 |
1 |
| 0 - 0.3m |
2 |
2967 |
1524 |
169 |
7 |
| 0.3 - 0.6m |
0 |
102 |
1439 |
1115 |
16 |
| 0.6 - 1m |
0 |
0 |
32 |
610 |
13 |
| >1m |
0 |
0 |
0 |
0 |
8 |
| Week after 2025-11-27, FC |
| =0m |
1 |
415 |
81 |
37 |
4 |
| 0 - 0.3m |
7 |
2695 |
1431 |
216 |
15 |
| 0.3 - 0.6m |
0 |
32 |
1586 |
730 |
9 |
| 0.6 - 1m |
0 |
16 |
106 |
917 |
20 |
| >1m |
0 |
0 |
0 |
1 |
4 |
| Week after 2025-11-27, BE |
| =0m |
1 |
346 |
67 |
39 |
4 |
| 0 - 0.3m |
7 |
2773 |
1548 |
206 |
16 |
| 0.3 - 0.6m |
0 |
28 |
1504 |
717 |
8 |
| 0.6 - 1m |
0 |
11 |
85 |
938 |
20 |
| >1m |
0 |
0 |
0 |
1 |
4 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-11-27, BE |
| =0m |
0 |
34 |
2 |
0 |
0 |
0 |
| 0 - 1m |
0 |
8471 |
949 |
80 |
9 |
0 |
| 1 - 1.5m |
0 |
164 |
5190 |
665 |
15 |
0 |
| 1.5 - 2m |
0 |
0 |
560 |
4369 |
489 |
0 |
| 2 - 2.5m |
0 |
0 |
6 |
369 |
1830 |
108 |
| >2.5m |
0 |
0 |
0 |
3 |
167 |
185 |
| Week after 2025-11-27, FC |
| =0m |
0 |
20 |
6 |
1 |
0 |
0 |
| 0 - 1m |
0 |
8939 |
1338 |
44 |
12 |
0 |
| 1 - 1.5m |
0 |
247 |
4986 |
699 |
7 |
1 |
| 1.5 - 2m |
0 |
0 |
488 |
4274 |
769 |
0 |
| 2 - 2.5m |
0 |
0 |
16 |
348 |
2122 |
150 |
| >2.5m |
0 |
0 |
0 |
5 |
128 |
312 |
| Week after 2025-11-27, BE |
| =0m |
0 |
23 |
6 |
1 |
0 |
0 |
| 0 - 1m |
0 |
9003 |
1250 |
40 |
12 |
0 |
| 1 - 1.5m |
0 |
180 |
5191 |
635 |
7 |
1 |
| 1.5 - 2m |
0 |
0 |
377 |
4470 |
796 |
0 |
| 2 - 2.5m |
0 |
0 |
10 |
223 |
2133 |
162 |
| >2.5m |
0 |
0 |
0 |
2 |
90 |
300 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-11-27, model vs. merged CS3SMOS data
Week after 2025-11-27, model vs. merged CS3SMOS data
Week before 2025-11-27, model vs. SMOS data
Week after 2025-11-27, model vs. SMOS data
Week before 2025-11-27, model vs. altimetry data
Week after 2025-11-27, model vs. altimetry data
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