Validation of sea ice concentration - American sector
 Bulletin date: 2025-02-18
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-02-18:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| OW | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| VODI | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| ODI | 0 | 0 | 0 | 0 | 10 | 12 | 4 | 0 |  
| CDI | 0 | 0 | 0 | 0 | 46 | 124 | 116 | 55 |  
| VCDI | 0 | 0 | 0 | 0 | 157 | 1583 | 8042 | 35445 |  | 
 Date: 2025-02-20:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| OW | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| VODI | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| ODI | 0 | 0 | 0 | 2 | 6 | 4 | 7 | 0 |  
| CDI | 0 | 0 | 0 | 4 | 54 | 98 | 65 | 51 |  
| VCDI | 0 | 0 | 0 | 6 | 334 | 1592 | 6643 | 36728 |  | 
 Date: 2025-02-22:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| OW | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| VODI | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| ODI | 0 | 0 | 0 | 0 | 0 | 4 | 7 | 1 |  
| CDI | 0 | 0 | 0 | 0 | 11 | 118 | 100 | 71 |  
| VCDI | 0 | 0 | 0 | 0 | 123 | 1589 | 8373 | 35197 |  | 
 Date: 2025-02-24:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| OW | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| VODI | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  
| ODI | 0 | 0 | 0 | 0 | 0 | 6 | 4 | 4 |  
| CDI | 0 | 0 | 0 | 0 | 14 | 86 | 60 | 154 |  
| VCDI | 0 | 0 | 0 | 0 | 82 | 1164 | 8299 | 35721 |  | 
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