Validation of ice thickness
Bulletin date: 2026-02-26
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 2026-02-26 | 0.625 | | -0.030 | | 0.220 |
| Week after 2026-02-26 | 0.544 | 0.010 | -0.010 | 0.270 | 0.250 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-02-26, BE |
0.286 |
0.778 |
0.834 |
0.86 |
0.723 |
| Week after 2026-02-26, FC |
0.167 |
0.743 |
0.813 |
0.732 |
0.616 |
| Week after 2026-02-26, BE |
0.111 |
0.763 |
0.828 |
0.772 |
0.651 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2026-02-26 | 1.516 | | -0.030 | | 0.200 |
|
| Week after 2026-02-26 | 1.579 | -0.050 | -0.060 | 0.240 | 0.230 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-02-26, BE |
0.065 |
0.905 |
0.954 |
0.945 |
0.938 |
0.979 |
| Week after 2026-02-26, FC |
0 |
0.867 |
0.926 |
0.873 |
0.922 |
0.908 |
| Week after 2026-02-26, BE |
0 |
0.884 |
0.938 |
0.892 |
0.931 |
0.932 |
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 2026-02-26, BE |
| =0m |
3 |
61 |
39 |
25 |
5 |
| 0 - 0.3m |
2 |
1518 |
774 |
279 |
41 |
| 0.3 - 0.6m |
0 |
507 |
2216 |
731 |
63 |
| 0.6 - 1m |
0 |
32 |
871 |
2939 |
380 |
| >1m |
0 |
0 |
68 |
533 |
1047 |
| Week after 2026-02-26, FC |
| =0m |
1 |
227 |
63 |
31 |
1 |
| 0 - 0.3m |
0 |
1928 |
864 |
246 |
45 |
| 0.3 - 0.6m |
0 |
513 |
1718 |
534 |
26 |
| 0.6 - 1m |
0 |
261 |
1229 |
2474 |
192 |
| >1m |
0 |
26 |
110 |
483 |
596 |
| Week after 2026-02-26, BE |
| =0m |
1 |
109 |
48 |
30 |
1 |
| 0 - 0.3m |
0 |
2143 |
919 |
233 |
47 |
| 0.3 - 0.6m |
0 |
455 |
1871 |
585 |
30 |
| 0.6 - 1m |
0 |
220 |
1035 |
2517 |
189 |
| >1m |
0 |
28 |
111 |
403 |
593 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-02-26, BE |
| =0m |
0 |
31 |
10 |
4 |
1 |
0 |
| 0 - 1m |
0 |
3477 |
870 |
60 |
26 |
7 |
| 1 - 1.5m |
0 |
622 |
10046 |
938 |
88 |
10 |
| 1.5 - 2m |
0 |
20 |
675 |
5702 |
302 |
21 |
| 2 - 2.5m |
0 |
0 |
0 |
473 |
2759 |
179 |
| >2.5m |
0 |
0 |
0 |
0 |
188 |
1264 |
| Week after 2026-02-26, FC |
| =0m |
0 |
17 |
6 |
5 |
2 |
0 |
| 0 - 1m |
0 |
3006 |
1116 |
92 |
43 |
17 |
| 1 - 1.5m |
0 |
855 |
9259 |
1757 |
57 |
18 |
| 1.5 - 2m |
0 |
11 |
841 |
5599 |
1339 |
63 |
| 2 - 2.5m |
0 |
0 |
4 |
200 |
2785 |
455 |
| >2.5m |
0 |
0 |
0 |
0 |
476 |
1395 |
| Week after 2026-02-26, BE |
| =0m |
0 |
16 |
6 |
5 |
2 |
0 |
| 0 - 1m |
0 |
3177 |
1134 |
90 |
36 |
17 |
| 1 - 1.5m |
0 |
689 |
9607 |
1879 |
51 |
13 |
| 1.5 - 2m |
0 |
7 |
479 |
5552 |
1307 |
46 |
| 2 - 2.5m |
0 |
0 |
0 |
127 |
2893 |
453 |
| >2.5m |
0 |
0 |
0 |
0 |
413 |
1419 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2026-02-26, model vs. merged CS3SMOS data
Week after 2026-02-26, model vs. merged CS3SMOS data
Week before 2026-02-26, model vs. SMOS data
Week after 2026-02-26, model vs. SMOS data
Week before 2026-02-26, model vs. altimetry data
Week after 2026-02-26, model vs. altimetry data
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