Validation of ice thickness
Bulletin date: 2025-11-20
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 2025-11-20 | 0.376 | | -0.140 | | 0.190 |
| Week after 2025-11-20 | 0.409 | -0.130 | -0.130 | 0.190 | 0.180 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-11-20, BE |
0.257 |
0.792 |
0.72 |
0.931 |
1 |
| Week after 2025-11-20, FC |
0.236 |
0.708 |
0.598 |
0.924 |
1 |
| Week after 2025-11-20, BE |
0.282 |
0.746 |
0.643 |
0.976 |
1 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-11-20 | 1.321 | | -0.110 | | 0.190 |
|
| Week after 2025-11-20 | 1.281 | -0.050 | -0.040 | 0.200 | 0.170 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-11-20, BE |
0.087 |
0.947 |
0.911 |
0.913 |
0.906 |
0.996 |
| Week after 2025-11-20, FC |
0.021 |
0.935 |
0.911 |
0.909 |
0.874 |
0.674 |
| Week after 2025-11-20, BE |
0.028 |
0.948 |
0.943 |
0.942 |
0.921 |
0.792 |
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 2025-11-20, BE |
| =0m |
1 |
315 |
78 |
10 |
1 |
| 0 - 0.3m |
0 |
3179 |
1322 |
120 |
9 |
| 0.3 - 0.6m |
0 |
27 |
1506 |
939 |
20 |
| 0.6 - 1m |
0 |
0 |
17 |
143 |
13 |
| >1m |
0 |
0 |
0 |
2 |
10 |
| Week after 2025-11-20, FC |
| =0m |
0 |
326 |
44 |
15 |
1 |
| 0 - 0.3m |
2 |
2856 |
1725 |
198 |
7 |
| 0.3 - 0.6m |
0 |
107 |
1204 |
1115 |
19 |
| 0.6 - 1m |
0 |
0 |
76 |
582 |
10 |
| >1m |
0 |
0 |
0 |
0 |
8 |
| Week after 2025-11-20, 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 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-11-20, BE |
| =0m |
0 |
19 |
3 |
1 |
0 |
0 |
| 0 - 1m |
0 |
7926 |
1099 |
70 |
10 |
0 |
| 1 - 1.5m |
0 |
126 |
4673 |
1140 |
15 |
0 |
| 1.5 - 2m |
0 |
0 |
251 |
3932 |
919 |
1 |
| 2 - 2.5m |
0 |
0 |
9 |
149 |
1666 |
345 |
| >2.5m |
0 |
0 |
1 |
0 |
10 |
265 |
| Week after 2025-11-20, FC |
| =0m |
0 |
44 |
3 |
0 |
0 |
0 |
| 0 - 1m |
0 |
8311 |
1062 |
90 |
11 |
0 |
| 1 - 1.5m |
0 |
314 |
4946 |
770 |
21 |
0 |
| 1.5 - 2m |
0 |
0 |
686 |
4168 |
608 |
12 |
| 2 - 2.5m |
0 |
0 |
8 |
441 |
1674 |
131 |
| >2.5m |
0 |
0 |
2 |
17 |
196 |
150 |
| Week after 2025-11-20, 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 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-11-20, model vs. merged CS3SMOS data
Week after 2025-11-20, model vs. merged CS3SMOS data
Week before 2025-11-20, model vs. SMOS data
Week after 2025-11-20, model vs. SMOS data
Week before 2025-11-20, model vs. altimetry data
Week after 2025-11-20, model vs. altimetry data
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