Validation of sea ice concentration - Full domain
 Bulletin date: 2025-09-09
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-09-09:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 72717 | 13061 | 9 | 82 | 13 | 0 | 0 | 0 |  
| OW | 120 | 1037 | 24 | 112 | 17 | 0 | 0 | 0 |  
| VODI | 207 | 2723 | 97 | 561 | 175 | 35 | 4 | 0 |  
| ODI | 130 | 3227 | 218 | 2450 | 1450 | 969 | 118 | 0 |  
| CDI | 1 | 416 | 74 | 3159 | 6367 | 6693 | 963 | 0 |  
| VCDI | 0 | 3 | 0 | 73 | 3265 | 10871 | 2992 | 0 |  | 
 Date: 2025-09-11:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 72907 | 14907 | 65 | 334 | 47 | 0 | 0 | 0 |  
| OW | 52 | 972 | 24 | 145 | 36 | 0 | 0 | 0 |  
| VODI | 86 | 2013 | 57 | 519 | 188 | 18 | 7 | 0 |  
| ODI | 16 | 2086 | 125 | 1867 | 1221 | 592 | 141 | 0 |  
| CDI | 0 | 404 | 82 | 2926 | 4690 | 5253 | 1260 | 0 |  
| VCDI | 0 | 20 | 2 | 202 | 2889 | 13876 | 4404 | 0 |  | 
 Date: 2025-09-13:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 72868 | 16274 | 65 | 571 | 97 | 9 | 0 | 0 |  
| OW | 55 | 691 | 12 | 182 | 60 | 0 | 0 | 0 |  
| VODI | 71 | 1203 | 33 | 472 | 179 | 33 | 5 | 0 |  
| ODI | 16 | 1704 | 83 | 1321 | 825 | 493 | 134 | 0 |  
| CDI | 0 | 383 | 69 | 2519 | 3559 | 3662 | 1187 | 0 |  
| VCDI | 0 | 13 | 0 | 456 | 3389 | 14786 | 6954 | 0 |  | 
 Date: 2025-09-15:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 73935 | 16193 | 102 | 735 | 304 | 48 | 0 | 0 |  
| OW | 84 | 402 | 17 | 130 | 55 | 13 | 0 | 0 |  
| VODI | 167 | 704 | 25 | 325 | 166 | 99 | 19 | 0 |  
| ODI | 157 | 1337 | 67 | 1030 | 575 | 524 | 164 | 0 |  
| CDI | 20 | 421 | 79 | 1912 | 2881 | 3313 | 1123 | 0 |  
| VCDI | 2 | 46 | 13 | 501 | 2515 | 14377 | 9853 | 0 |  | 
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