Validation of sea ice concentration - American sector
 Bulletin date: 2021-05-04
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2021-05-04:
 | 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 | 9 | 12 | 1 | 2 | 0 |  
| OW | 0 | 0 | 0 | 5 | 17 | 3 | 8 | 5 |  
| VODI | 0 | 5 | 0 | 47 | 29 | 29 | 38 | 38 |  
| ODI | 0 | 0 | 0 | 8 | 60 | 82 | 92 | 158 |  
| CDI | 0 | 0 | 0 | 2 | 33 | 113 | 184 | 782 |  
| VCDI | 0 | 0 | 0 | 0 | 65 | 515 | 3994 | 28993 |  | 
 Date: 2021-05-06:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 9 | 0 | 95 | 82 | 68 | 63 | 11 |  
| OW | 0 | 5 | 0 | 25 | 53 | 43 | 53 | 10 |  
| VODI | 0 | 0 | 0 | 14 | 74 | 65 | 155 | 26 |  
| ODI | 0 | 0 | 0 | 14 | 44 | 39 | 186 | 66 |  
| CDI | 0 | 0 | 0 | 7 | 33 | 102 | 437 | 330 |  
| VCDI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  | 
 Date: 2021-05-08:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| OW | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| VODI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| ODI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| CDI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| VCDI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  | 
 Date: 2021-05-10:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| OW | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| VODI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| ODI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| CDI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  
| VCDI | 0 | 0 | 0 | 33 | 159 | 658 | 6511 | 25859 |  | 
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