Validation of sea ice concentration - American sector
 Bulletin date: 2021-07-27
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2021-07-27:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 1225 | 3710 | 0 | 175 | 54 | 7 | 0 | 0 |  
| OW | 0 | 100 | 0 | 169 | 72 | 34 | 2 | 0 |  
| VODI | 0 | 126 | 0 | 388 | 1060 | 603 | 104 | 0 |  
| ODI | 0 | 101 | 0 | 382 | 2465 | 2962 | 1134 | 0 |  
| CDI | 0 | 30 | 0 | 190 | 2973 | 9861 | 5184 | 0 |  
| VCDI | 0 | 0 | 0 | 0 | 106 | 1008 | 1104 | 0 |  | 
 Date: 2021-07-29:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 1804 | 3440 | 0 | 347 | 177 | 82 | 2 | 0 |  
| OW | 0 | 143 | 0 | 123 | 238 | 95 | 18 | 0 |  
| VODI | 0 | 187 | 0 | 182 | 739 | 879 | 137 | 18 |  
| ODI | 0 | 158 | 0 | 245 | 1774 | 3488 | 1094 | 288 |  
| CDI | 0 | 27 | 0 | 163 | 2331 | 9320 | 5091 | 977 |  
| VCDI | 0 | 0 | 0 | 1 | 46 | 895 | 746 | 74 |  | 
 Date: 2021-07-31:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 1801 | 3759 | 0 | 462 | 216 | 124 | 16 | 0 |  
| OW | 0 | 130 | 0 | 91 | 187 | 55 | 24 | 0 |  
| VODI | 0 | 201 | 0 | 212 | 1032 | 573 | 206 | 1 |  
| ODI | 0 | 182 | 0 | 365 | 2522 | 3032 | 1267 | 16 |  
| CDI | 0 | 30 | 0 | 250 | 2618 | 8824 | 5667 | 57 |  
| VCDI | 0 | 0 | 0 | 1 | 47 | 654 | 699 | 8 |  | 
 Date: 2021-08-02:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 864 | 4845 | 0 | 493 | 213 | 127 | 17 | 0 |  
| OW | 0 | 117 | 0 | 100 | 185 | 55 | 32 | 0 |  
| VODI | 0 | 278 | 0 | 271 | 1075 | 548 | 257 | 15 |  
| ODI | 0 | 244 | 0 | 475 | 2510 | 3053 | 1652 | 256 |  
| CDI | 0 | 40 | 0 | 256 | 2515 | 7007 | 5513 | 1404 |  
| VCDI | 0 | 0 | 0 | 1 | 82 | 386 | 390 | 53 |  | 
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