Validation of sea ice concentration - European sector
 Bulletin date: 2025-05-27
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-05-27:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 22965 | 10689 | 30 | 193 | 21 | 5 | 0 | 0 |  
| OW | 14 | 573 | 21 | 207 | 55 | 7 | 0 | 0 |  
| VODI | 38 | 986 | 91 | 788 | 508 | 159 | 23 | 0 |  
| ODI | 14 | 568 | 87 | 1236 | 1689 | 777 | 287 | 37 |  
| CDI | 0 | 88 | 27 | 595 | 1508 | 1530 | 1553 | 461 |  
| VCDI | 0 | 21 | 0 | 216 | 847 | 1909 | 3793 | 2052 |  | 
 Date: 2025-05-29:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 23254 | 12356 | 127 | 992 | 258 | 27 | 0 | 0 |  
| OW | 0 | 172 | 27 | 206 | 79 | 11 | 0 | 0 |  
| VODI | 0 | 238 | 55 | 484 | 495 | 186 | 33 | 4 |  
| ODI | 0 | 177 | 32 | 768 | 1428 | 694 | 364 | 72 |  
| CDI | 0 | 62 | 20 | 580 | 1369 | 1275 | 1506 | 1072 |  
| VCDI | 0 | 19 | 4 | 318 | 849 | 1694 | 2606 | 2755 |  | 
 Date: 2025-05-31:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 23839 | 12372 | 166 | 1212 | 324 | 28 | 0 | 0 |  
| OW | 0 | 128 | 15 | 145 | 120 | 19 | 2 | 0 |  
| VODI | 0 | 219 | 30 | 351 | 578 | 166 | 56 | 2 |  
| ODI | 0 | 212 | 61 | 692 | 1283 | 672 | 381 | 23 |  
| CDI | 0 | 93 | 25 | 493 | 1292 | 1267 | 1682 | 494 |  
| VCDI | 0 | 54 | 13 | 332 | 817 | 1638 | 3334 | 2038 |  | 
 Date: 2025-06-02:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 24045 | 12449 | 168 | 1372 | 300 | 69 | 0 | 0 |  
| OW | 0 | 95 | 14 | 199 | 71 | 28 | 0 | 0 |  
| VODI | 0 | 211 | 29 | 406 | 537 | 156 | 41 | 0 |  
| ODI | 0 | 185 | 39 | 683 | 1291 | 661 | 344 | 2 |  
| CDI | 0 | 105 | 18 | 518 | 1432 | 1568 | 1948 | 136 |  
| VCDI | 0 | 79 | 14 | 280 | 816 | 1960 | 3568 | 831 |  | 
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