Validation of sea ice concentration - American sector
 Bulletin date: 2025-08-26
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-08-26:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 13736 | 3017 | 3 | 25 | 6 | 0 | 0 | 0 |  
| OW | 134 | 761 | 10 | 33 | 11 | 0 | 0 | 0 |  
| VODI | 137 | 1631 | 53 | 222 | 87 | 11 | 6 | 0 |  
| ODI | 75 | 3935 | 187 | 1616 | 1091 | 562 | 259 | 0 |  
| CDI | 28 | 817 | 58 | 1189 | 3147 | 3048 | 1051 | 0 |  
| VCDI | 0 | 33 | 5 | 199 | 1795 | 4867 | 1712 | 0 |  | 
 Date: 2025-08-28:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 14383 | 4384 | 20 | 246 | 68 | 5 | 0 | 0 |  
| OW | 25 | 389 | 9 | 66 | 23 | 5 | 0 | 0 |  
| VODI | 29 | 827 | 27 | 190 | 82 | 26 | 2 | 0 |  
| ODI | 149 | 3164 | 98 | 1291 | 846 | 623 | 56 | 0 |  
| CDI | 31 | 936 | 56 | 1215 | 2427 | 4045 | 441 | 0 |  
| VCDI | 0 | 60 | 6 | 290 | 1215 | 6695 | 1107 | 0 |  | 
 Date: 2025-08-30:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 14585 | 4924 | 41 | 245 | 118 | 2 | 0 | 0 |  
| OW | 9 | 323 | 6 | 50 | 20 | 1 | 0 | 0 |  
| VODI | 20 | 734 | 18 | 193 | 87 | 18 | 3 | 0 |  
| ODI | 113 | 2522 | 60 | 1045 | 805 | 428 | 41 | 0 |  
| CDI | 34 | 974 | 47 | 979 | 2979 | 3548 | 316 | 0 |  
| VCDI | 0 | 135 | 7 | 278 | 2461 | 6544 | 844 | 0 |  | 
 Date: 2025-09-01:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 14851 | 5042 | 49 | 214 | 106 | 14 | 0 | 0 |  
| OW | 20 | 336 | 9 | 67 | 18 | 6 | 0 | 0 |  
| VODI | 39 | 811 | 22 | 173 | 89 | 40 | 2 | 0 |  
| ODI | 132 | 2263 | 89 | 928 | 736 | 377 | 36 | 0 |  
| CDI | 77 | 1103 | 52 | 1118 | 2408 | 2923 | 432 | 0 |  
| VCDI | 0 | 198 | 19 | 432 | 2716 | 6475 | 1135 | 0 |  | 
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