Validation of ice thickness
Bulletin date: 2025-12-04
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 2025-12-04 | 0.410 | | -0.130 | | 0.200 |
| Week after 2025-12-04 | 0.416 | -0.080 | -0.080 | 0.180 | 0.170 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-12-04, BE |
0.199 |
0.74 |
0.763 |
0.939 |
1 |
| Week after 2025-12-04, FC |
0.172 |
0.872 |
0.774 |
0.828 |
0.714 |
| Week after 2025-12-04, BE |
0.2 |
0.877 |
0.785 |
0.864 |
0.833 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-12-04 | 1.306 | | -0.060 | | 0.160 |
|
| Week after 2025-12-04 | 1.294 | -0.070 | -0.070 | 0.190 | 0.170 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-04, BE |
0.033 |
0.954 |
0.951 |
0.931 |
0.944 |
0.967 |
| Week after 2025-12-04, FC |
0.049 |
0.929 |
0.943 |
0.92 |
0.926 |
0.909 |
| Week after 2025-12-04, BE |
0.077 |
0.94 |
0.965 |
0.945 |
0.941 |
0.929 |
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 2025-12-04, 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 |
| Week after 2025-12-04, FC |
| =0m |
0 |
305 |
58 |
25 |
2 |
| 0 - 0.3m |
0 |
3260 |
831 |
170 |
10 |
| 0.3 - 0.6m |
0 |
197 |
1880 |
781 |
15 |
| 0.6 - 1m |
0 |
27 |
338 |
1236 |
81 |
| >1m |
0 |
0 |
0 |
2 |
5 |
| Week after 2025-12-04, 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 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-04, 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 |
| Week after 2025-12-04, FC |
| =0m |
0 |
51 |
8 |
2 |
0 |
0 |
| 0 - 1m |
0 |
9143 |
1598 |
56 |
8 |
2 |
| 1 - 1.5m |
0 |
292 |
5681 |
667 |
22 |
0 |
| 1.5 - 2m |
0 |
0 |
319 |
4128 |
969 |
1 |
| 2 - 2.5m |
0 |
0 |
0 |
201 |
1803 |
360 |
| >2.5m |
0 |
0 |
0 |
10 |
114 |
284 |
| Week after 2025-12-04, 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 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-12-04, model vs. merged CS3SMOS data
Week after 2025-12-04, model vs. merged CS3SMOS data
Week before 2025-12-04, model vs. SMOS data
Week after 2025-12-04, model vs. SMOS data
Week before 2025-12-04, model vs. altimetry data
Week after 2025-12-04, model vs. altimetry data
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