Validation of sea ice concentration - Full domain
 Bulletin date: 2025-09-16
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-09-16:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 74147 | 11242 | 2 | 31 | 2 | 1 | 0 | 0 |  
| OW | 229 | 902 | 15 | 64 | 24 | 0 | 0 | 0 |  
| VODI | 536 | 2596 | 64 | 423 | 189 | 42 | 8 | 0 |  
| ODI | 440 | 3181 | 154 | 1739 | 845 | 481 | 117 | 0 |  
| CDI | 17 | 361 | 63 | 2046 | 3759 | 3681 | 1376 | 0 |  
| VCDI | 0 | 7 | 0 | 84 | 1443 | 12363 | 11724 | 35 |  | 
 Date: 2025-09-18:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 73669 | 14262 | 110 | 212 | 67 | 27 | 0 | 0 |  
| OW | 140 | 866 | 61 | 158 | 49 | 15 | 0 | 0 |  
| VODI | 277 | 1681 | 156 | 661 | 212 | 59 | 0 | 0 |  
| ODI | 196 | 1614 | 365 | 1468 | 763 | 326 | 57 | 0 |  
| CDI | 3 | 188 | 63 | 1726 | 3256 | 3173 | 1129 | 56 |  
| VCDI | 0 | 4 | 0 | 175 | 1368 | 11896 | 12864 | 1061 |  | 
 Date: 2025-09-20:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 74618 | 14906 | 61 | 449 | 149 | 16 | 0 | 0 |  
| OW | 96 | 633 | 17 | 167 | 43 | 15 | 0 | 0 |  
| VODI | 164 | 1241 | 50 | 377 | 149 | 81 | 3 | 0 |  
| ODI | 138 | 1452 | 85 | 1164 | 582 | 294 | 41 | 6 |  
| CDI | 0 | 271 | 39 | 922 | 1887 | 2941 | 1034 | 129 |  
| VCDI | 0 | 46 | 8 | 231 | 1256 | 12604 | 13919 | 2149 |  | 
 Date: 2025-09-22:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 74478 | 15424 | 176 | 540 | 239 | 91 | 7 | 0 |  
| OW | 40 | 445 | 36 | 161 | 102 | 32 | 1 | 0 |  
| VODI | 84 | 748 | 60 | 318 | 241 | 110 | 6 | 0 |  
| ODI | 82 | 1143 | 125 | 701 | 676 | 310 | 61 | 5 |  
| CDI | 1 | 305 | 86 | 739 | 1340 | 1857 | 1342 | 96 |  
| VCDI | 0 | 80 | 22 | 339 | 1319 | 8332 | 19534 | 2599 |  | 
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