Validation of ice thickness
Bulletin date: 2026-03-19
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 2026-03-19 | 0.499 | | 0.040 | | 0.220 |
| Week after 2026-03-19 | 0.500 | 0.080 | 0.060 | 0.260 | 0.240 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2026-03-19, BE |
0.094 |
0.905 |
0.837 |
0.753 |
0.651 |
| Week after 2026-03-19, FC |
0.135 |
0.913 |
0.812 |
0.657 |
0.632 |
| Week after 2026-03-19, BE |
0.143 |
0.916 |
0.837 |
0.716 |
0.68 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2026-03-19 | 1.677 | | -0.130 | | 0.260 |
|
| Week after 2026-03-19 | 1.774 | -0.140 | -0.120 | 0.280 | 0.250 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-03-19, BE |
0 |
0.871 |
0.905 |
0.869 |
0.849 |
0.972 |
| Week after 2026-03-19, FC |
0 |
0.894 |
0.879 |
0.845 |
0.736 |
0.99 |
| Week after 2026-03-19, BE |
0 |
0.91 |
0.91 |
0.893 |
0.809 |
0.997 |
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 2026-03-19, BE |
| =0m |
0 |
60 |
54 |
11 |
3 |
| 0 - 0.3m |
2 |
2678 |
596 |
111 |
29 |
| 0.3 - 0.6m |
2 |
872 |
2269 |
224 |
31 |
| 0.6 - 1m |
0 |
123 |
1010 |
2137 |
259 |
| >1m |
0 |
2 |
55 |
523 |
548 |
| Week after 2026-03-19, FC |
| =0m |
0 |
124 |
55 |
22 |
6 |
| 0 - 0.3m |
0 |
2754 |
474 |
137 |
33 |
| 0.3 - 0.6m |
0 |
1413 |
2043 |
254 |
46 |
| 0.6 - 1m |
0 |
198 |
1498 |
1799 |
172 |
| >1m |
0 |
26 |
105 |
818 |
883 |
| Week after 2026-03-19, BE |
| =0m |
0 |
101 |
54 |
22 |
5 |
| 0 - 0.3m |
0 |
3034 |
578 |
138 |
34 |
| 0.3 - 0.6m |
0 |
1211 |
2211 |
278 |
45 |
| 0.6 - 1m |
0 |
146 |
1239 |
1884 |
153 |
| >1m |
0 |
23 |
93 |
708 |
903 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2026-03-19, BE |
| =0m |
0 |
29 |
7 |
7 |
0 |
0 |
| 0 - 1m |
0 |
3503 |
1049 |
121 |
57 |
11 |
| 1 - 1.5m |
0 |
334 |
6718 |
2208 |
148 |
26 |
| 1.5 - 2m |
0 |
5 |
335 |
5403 |
1882 |
42 |
| 2 - 2.5m |
0 |
0 |
8 |
158 |
3154 |
1336 |
| >2.5m |
0 |
0 |
0 |
0 |
165 |
1598 |
| Week after 2026-03-19, FC |
| =0m |
0 |
18 |
10 |
2 |
0 |
0 |
| 0 - 1m |
0 |
2828 |
886 |
89 |
37 |
14 |
| 1 - 1.5m |
0 |
491 |
5600 |
2143 |
66 |
17 |
| 1.5 - 2m |
0 |
17 |
356 |
5781 |
2334 |
72 |
| 2 - 2.5m |
0 |
0 |
19 |
204 |
3081 |
2170 |
| >2.5m |
0 |
0 |
0 |
4 |
99 |
1918 |
| Week after 2026-03-19, BE |
| =0m |
0 |
18 |
11 |
2 |
0 |
0 |
| 0 - 1m |
0 |
2896 |
816 |
74 |
35 |
12 |
| 1 - 1.5m |
0 |
429 |
5717 |
1929 |
40 |
15 |
| 1.5 - 2m |
0 |
11 |
311 |
6037 |
1917 |
63 |
| 2 - 2.5m |
0 |
0 |
16 |
179 |
3549 |
1793 |
| >2.5m |
0 |
0 |
0 |
2 |
76 |
2308 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2026-03-19, model vs. merged CS3SMOS data
Week after 2026-03-19, model vs. merged CS3SMOS data
Week before 2026-03-19, model vs. SMOS data
Week after 2026-03-19, model vs. SMOS data
Week before 2026-03-19, model vs. altimetry data
Week after 2026-03-19, model vs. altimetry data
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