Validation of sea ice concentration - American sector
 Bulletin date: 2025-07-01
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2025-07-01:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 2644 | 4075 | 6 | 90 | 21 | 13 | 1 | 0 |  
| OW | 161 | 603 | 8 | 64 | 49 | 26 | 2 | 0 |  
| VODI | 7 | 684 | 12 | 195 | 324 | 243 | 6 | 1 |  
| ODI | 1 | 693 | 48 | 526 | 874 | 1100 | 104 | 29 |  
| CDI | 0 | 692 | 60 | 1102 | 2255 | 4182 | 783 | 390 |  
| VCDI | 0 | 330 | 31 | 683 | 3459 | 13727 | 3674 | 1579 |  | 
 Date: 2025-07-03:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 3060 | 5487 | 45 | 272 | 220 | 64 | 8 | 0 |  
| OW | 1 | 189 | 5 | 60 | 95 | 45 | 8 | 0 |  
| VODI | 2 | 349 | 11 | 182 | 339 | 232 | 12 | 0 |  
| ODI | 0 | 577 | 26 | 375 | 892 | 962 | 148 | 3 |  
| CDI | 0 | 832 | 50 | 704 | 2359 | 3996 | 1043 | 13 |  
| VCDI | 0 | 456 | 29 | 473 | 3869 | 13061 | 4915 | 88 |  | 
 Date: 2025-07-05:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 2691 | 6530 | 48 | 464 | 375 | 166 | 14 | 0 |  
| OW | 0 | 175 | 6 | 59 | 98 | 40 | 4 | 0 |  
| VODI | 0 | 359 | 12 | 149 | 293 | 275 | 9 | 0 |  
| ODI | 0 | 551 | 21 | 273 | 880 | 911 | 87 | 0 |  
| CDI | 0 | 915 | 58 | 477 | 2601 | 3618 | 672 | 0 |  
| VCDI | 0 | 582 | 40 | 282 | 5227 | 13494 | 3097 | 4 |  | 
 Date: 2025-07-07:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 3907 | 5908 | 26 | 529 | 496 | 150 | 13 | 0 |  
| OW | 0 | 175 | 6 | 50 | 80 | 37 | 2 | 0 |  
| VODI | 2 | 392 | 9 | 142 | 269 | 241 | 19 | 0 |  
| ODI | 3 | 625 | 15 | 265 | 849 | 820 | 69 | 0 |  
| CDI | 3 | 812 | 21 | 364 | 2296 | 3837 | 593 | 0 |  
| VCDI | 0 | 552 | 25 | 266 | 4918 | 14263 | 2508 | 0 |  | 
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