Validation of sea ice concentration - European sector
 Bulletin date: 2025-10-14
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-10-14:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 44311 | 3439 | 3 | 2 | 1 | 0 | 0 | 0 |  
| OW | 9 | 96 | 0 | 7 | 0 | 0 | 0 | 0 |  
| VODI | 7 | 197 | 2 | 30 | 7 | 0 | 0 | 0 |  
| ODI | 0 | 381 | 17 | 148 | 36 | 3 | 1 | 0 |  
| CDI | 0 | 221 | 25 | 349 | 253 | 85 | 76 | 6 |  
| VCDI | 0 | 23 | 3 | 36 | 291 | 2140 | 3867 | 558 |  | 
 Date: 2025-10-16:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 43691 | 3722 | 6 | 86 | 28 | 3 | 0 | 0 |  
| OW | 0 | 79 | 3 | 14 | 4 | 0 | 0 | 0 |  
| VODI | 0 | 120 | 3 | 40 | 15 | 2 | 0 | 0 |  
| ODI | 0 | 135 | 9 | 101 | 65 | 1 | 0 | 0 |  
| CDI | 0 | 124 | 10 | 161 | 310 | 159 | 116 | 1 |  
| VCDI | 0 | 60 | 12 | 161 | 436 | 3339 | 3408 | 206 |  | 
 Date: 2025-10-18:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 43345 | 3664 | 19 | 242 | 55 | 7 | 0 | 0 |  
| OW | 0 | 67 | 1 | 28 | 26 | 2 | 0 | 0 |  
| VODI | 0 | 97 | 4 | 49 | 46 | 5 | 0 | 0 |  
| ODI | 0 | 106 | 6 | 70 | 62 | 6 | 5 | 0 |  
| CDI | 0 | 78 | 3 | 97 | 240 | 189 | 85 | 0 |  
| VCDI | 0 | 19 | 4 | 124 | 395 | 4268 | 3216 | 0 |  | 
 Date: 2025-10-20:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 42843 | 4010 | 24 | 263 | 88 | 17 | 0 | 0 |  
| OW | 0 | 58 | 3 | 34 | 17 | 5 | 0 | 0 |  
| VODI | 0 | 91 | 3 | 51 | 44 | 10 | 0 | 0 |  
| ODI | 0 | 54 | 3 | 45 | 74 | 15 | 7 | 0 |  
| CDI | 0 | 42 | 2 | 99 | 173 | 295 | 110 | 0 |  
| VCDI | 0 | 33 | 4 | 103 | 792 | 4745 | 2473 | 0 |  | 
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