Validation of sea ice concentration - European sector
 Bulletin date: 2021-04-06
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2021-04-06:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 6577 | 7473 | 0 | 186 | 37 | 6 | 0 | 0 |  
| OW | 0 | 136 | 0 | 93 | 67 | 13 | 0 | 0 |  
| VODI | 0 | 186 | 0 | 108 | 138 | 73 | 1 | 0 |  
| ODI | 0 | 142 | 0 | 96 | 163 | 165 | 14 | 0 |  
| CDI | 0 | 126 | 0 | 108 | 308 | 256 | 201 | 10 |  
| VCDI | 0 | 251 | 0 | 483 | 1442 | 2453 | 4235 | 4855 |  | 
 Date: 2021-04-08:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 6893 | 7291 | 0 | 212 | 148 | 6 | 0 | 0 |  
| OW | 0 | 164 | 0 | 73 | 109 | 24 | 0 | 0 |  
| VODI | 0 | 255 | 0 | 117 | 136 | 100 | 3 | 0 |  
| ODI | 0 | 175 | 0 | 164 | 154 | 116 | 17 | 0 |  
| CDI | 0 | 193 | 0 | 146 | 223 | 215 | 123 | 2 |  
| VCDI | 0 | 635 | 0 | 662 | 1328 | 2332 | 3780 | 4606 |  | 
 Date: 2021-04-10:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 7252 | 7091 | 0 | 225 | 156 | 10 | 0 | 0 |  
| OW | 0 | 179 | 0 | 85 | 157 | 28 | 0 | 0 |  
| VODI | 0 | 272 | 0 | 124 | 232 | 26 | 2 | 0 |  
| ODI | 0 | 270 | 0 | 121 | 226 | 62 | 48 | 0 |  
| CDI | 0 | 317 | 0 | 135 | 228 | 234 | 216 | 3 |  
| VCDI | 0 | 917 | 0 | 524 | 976 | 1980 | 3673 | 4633 |  | 
 Date: 2021-04-12:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 7485 | 6837 | 0 | 237 | 180 | 16 | 0 | 0 |  
| OW | 0 | 162 | 0 | 73 | 124 | 23 | 0 | 0 |  
| VODI | 0 | 240 | 0 | 118 | 177 | 33 | 5 | 0 |  
| ODI | 0 | 227 | 0 | 96 | 144 | 87 | 35 | 0 |  
| CDI | 0 | 284 | 0 | 128 | 256 | 283 | 233 | 0 |  
| VCDI | 0 | 1072 | 0 | 584 | 1025 | 2086 | 3473 | 4679 |  | 
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