Validation of sea ice concentration - European sector
 Bulletin date: 2025-05-06
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-05-06:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 17791 | 13381 | 78 | 488 | 36 | 2 | 0 | 0 |  
| OW | 8 | 300 | 15 | 223 | 50 | 5 | 0 | 0 |  
| VODI | 9 | 464 | 42 | 559 | 374 | 87 | 10 | 0 |  
| ODI | 17 | 235 | 38 | 712 | 1053 | 616 | 120 | 14 |  
| CDI | 10 | 49 | 10 | 506 | 1399 | 1955 | 810 | 324 |  
| VCDI | 6 | 21 | 5 | 187 | 1171 | 3759 | 4903 | 4826 |  | 
 Date: 2025-05-08:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 17702 | 14317 | 142 | 1045 | 161 | 18 | 0 | 0 |  
| OW | 10 | 89 | 7 | 233 | 133 | 18 | 0 | 0 |  
| VODI | 9 | 150 | 20 | 419 | 561 | 166 | 12 | 0 |  
| ODI | 5 | 65 | 18 | 516 | 1159 | 680 | 188 | 5 |  
| CDI | 2 | 23 | 8 | 342 | 1397 | 1800 | 946 | 150 |  
| VCDI | 1 | 10 | 4 | 173 | 1199 | 3787 | 6870 | 2108 |  | 
 Date: 2025-05-10:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 19010 | 13490 | 140 | 1035 | 323 | 34 | 0 | 0 |  
| OW | 3 | 116 | 15 | 175 | 187 | 30 | 0 | 0 |  
| VODI | 5 | 139 | 19 | 428 | 691 | 232 | 8 | 0 |  
| ODI | 0 | 82 | 44 | 518 | 1200 | 752 | 172 | 3 |  
| CDI | 0 | 61 | 9 | 348 | 1403 | 1716 | 1095 | 123 |  
| VCDI | 1 | 29 | 6 | 249 | 1226 | 3073 | 6367 | 2111 |  | 
 Date: 2025-05-12:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 19718 | 12951 | 92 | 1253 | 391 | 41 | 0 | 0 |  
| OW | 1 | 85 | 7 | 231 | 199 | 39 | 0 | 0 |  
| VODI | 0 | 152 | 9 | 566 | 746 | 191 | 10 | 0 |  
| ODI | 0 | 121 | 16 | 663 | 1221 | 635 | 246 | 3 |  
| CDI | 0 | 56 | 8 | 411 | 1572 | 1579 | 1369 | 70 |  
| VCDI | 0 | 15 | 4 | 262 | 1502 | 2601 | 6037 | 1595 |  | 
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