Validation of ice thickness
Bulletin date: 2025-12-25
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 2025-12-25 | 0.371 | | -0.080 | | 0.180 |
| Week after 2025-12-25 | 0.423 | -0.100 | -0.110 | 0.210 | 0.200 |
| Accept frequency |
| Week | =0m | 0 - 0.3m | 0.3 - 0.6m | 0.6-1m | >1m |
| Week before 2025-12-25, BE |
0.034 |
0.878 |
0.821 |
0.772 |
0.375 |
| Week after 2025-12-25, FC |
0.088 |
0.671 |
0.721 |
0.81 |
0.663 |
| Week after 2025-12-25, BE |
0.112 |
0.689 |
0.736 |
0.845 |
0.687 |
| CryoSat-2, Sentinel 3A/B |
| Week | Avg. obs. | FC bias | BE bias | FC RMS | BE RMS |
|
| Week before 2025-12-25 | 1.274 | | -0.040 | | 0.200 |
|
| Week after 2025-12-25 | 1.347 | -0.110 | -0.110 | 0.230 | 0.210 |
|
| Accept frequency |
| Week | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-25, BE |
0 |
0.931 |
0.958 |
0.924 |
0.875 |
0.958 |
| Week after 2025-12-25, FC |
0.017 |
0.886 |
0.862 |
0.888 |
0.955 |
0.98 |
| Week after 2025-12-25, BE |
0 |
0.905 |
0.876 |
0.9 |
0.979 |
0.981 |
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 2025-12-25, BE |
| =0m |
0 |
399 |
49 |
10 |
6 |
| 0 - 0.3m |
5 |
4455 |
1319 |
118 |
20 |
| 0.3 - 0.6m |
0 |
363 |
2159 |
571 |
26 |
| 0.6 - 1m |
0 |
71 |
255 |
858 |
104 |
| >1m |
0 |
0 |
12 |
20 |
8 |
| Week after 2025-12-25, FC |
| =0m |
6 |
313 |
68 |
42 |
12 |
| 0 - 0.3m |
2 |
3584 |
2457 |
221 |
40 |
| 0.3 - 0.6m |
0 |
511 |
1923 |
854 |
52 |
| 0.6 - 1m |
0 |
20 |
315 |
1164 |
136 |
| >1m |
0 |
0 |
2 |
82 |
118 |
| Week after 2025-12-25, BE |
| =0m |
6 |
176 |
61 |
33 |
9 |
| 0 - 0.3m |
2 |
3885 |
2551 |
214 |
42 |
| 0.3 - 0.6m |
0 |
359 |
1930 |
890 |
50 |
| 0.6 - 1m |
0 |
8 |
222 |
1151 |
151 |
| >1m |
0 |
0 |
1 |
75 |
106 |
| CryoSat-2, Sentinel 3A/B |
Observed →
Modeled ↓ | =0m | 0 - 1m | 1 - 1.5m | 1.5-2m | 2 - 2.5m | >2.5m |
| Week before 2025-12-25, BE |
| =0m |
0 |
15 |
5 |
0 |
3 |
0 |
| 0 - 1m |
0 |
9330 |
1796 |
70 |
19 |
15 |
| 1 - 1.5m |
0 |
334 |
7064 |
634 |
61 |
22 |
| 1.5 - 2m |
0 |
0 |
722 |
4334 |
262 |
12 |
| 2 - 2.5m |
0 |
0 |
0 |
655 |
1767 |
213 |
| >2.5m |
0 |
0 |
0 |
0 |
61 |
517 |
| Week after 2025-12-25, FC |
| =0m |
0 |
48 |
8 |
2 |
1 |
0 |
| 0 - 1m |
0 |
8215 |
2492 |
149 |
39 |
11 |
| 1 - 1.5m |
0 |
314 |
7074 |
2074 |
49 |
7 |
| 1.5 - 2m |
0 |
0 |
200 |
3757 |
967 |
6 |
| 2 - 2.5m |
0 |
0 |
0 |
238 |
2332 |
214 |
| >2.5m |
0 |
0 |
0 |
0 |
114 |
592 |
| Week after 2025-12-25, BE |
| =0m |
0 |
47 |
6 |
2 |
0 |
0 |
| 0 - 1m |
0 |
8311 |
2344 |
132 |
34 |
10 |
| 1 - 1.5m |
0 |
219 |
7287 |
2027 |
42 |
6 |
| 1.5 - 2m |
0 |
0 |
137 |
3939 |
1013 |
7 |
| 2 - 2.5m |
0 |
0 |
0 |
120 |
2313 |
234 |
| >2.5m |
0 |
0 |
0 |
0 |
100 |
573 |
Sea ice thickness maps
Statistics | Contingency tables | Maps
Week before 2025-12-25, model vs. merged CS3SMOS data
Week after 2025-12-25, model vs. merged CS3SMOS data
Week before 2025-12-25, model vs. SMOS data
Week after 2025-12-25, model vs. SMOS data
Week before 2025-12-25, model vs. altimetry data
Week after 2025-12-25, model vs. altimetry data
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