Validation of sea ice concentration - American sector
 Bulletin date: 2024-12-31
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2024-12-31:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 398 | 671 | 0 | 0 | 0 | 0 | 0 | 0 |  
| OW | 6 | 99 | 0 | 0 | 0 | 0 | 0 | 0 |  
| VODI | 13 | 298 | 7 | 28 | 5 | 0 | 0 | 0 |  
| ODI | 3 | 551 | 36 | 168 | 80 | 3 | 1 | 0 |  
| CDI | 0 | 351 | 18 | 356 | 283 | 142 | 59 | 117 |  
| VCDI | 0 | 72 | 2 | 506 | 1243 | 2519 | 7686 | 29873 |  | 
 Date: 2025-01-02:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 253 | 918 | 1 | 65 | 8 | 0 | 0 | 0 |  
| OW | 8 | 112 | 1 | 28 | 7 | 1 | 0 | 0 |  
| VODI | 0 | 272 | 3 | 80 | 18 | 3 | 0 | 0 |  
| ODI | 0 | 326 | 3 | 182 | 86 | 8 | 1 | 1 |  
| CDI | 0 | 226 | 7 | 300 | 165 | 162 | 74 | 115 |  
| VCDI | 0 | 150 | 2 | 392 | 404 | 3047 | 9682 | 28483 |  | 
 Date: 2025-01-04:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 417 | 899 | 8 | 120 | 24 | 0 | 0 | 0 |  
| OW | 20 | 127 | 4 | 41 | 24 | 0 | 0 | 0 |  
| VODI | 41 | 252 | 7 | 93 | 34 | 0 | 0 | 0 |  
| ODI | 0 | 238 | 6 | 109 | 50 | 8 | 0 | 0 |  
| CDI | 0 | 216 | 8 | 113 | 96 | 93 | 98 | 109 |  
| VCDI | 0 | 259 | 12 | 405 | 475 | 3289 | 7646 | 30253 |  | 
 Date: 2025-01-06:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 224 | 1103 | 32 | 183 | 121 | 38 | 0 | 0 |  
| OW | 3 | 100 | 7 | 31 | 24 | 25 | 0 | 0 |  
| VODI | 9 | 178 | 7 | 95 | 43 | 43 | 0 | 0 |  
| ODI | 0 | 95 | 4 | 137 | 84 | 48 | 1 | 1 |  
| CDI | 0 | 99 | 1 | 138 | 82 | 95 | 44 | 122 |  
| VCDI | 0 | 181 | 8 | 320 | 282 | 2011 | 7698 | 31877 |  | 
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