Validation of sea ice concentration - European sector
 Bulletin date: 2021-05-25
 Data source: OSI SAF N.H. sea ice concentration
 Model vs. observations, sea ice class contingency tables
 Date: 2021-05-25:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 7467 | 7315 | 0 | 280 | 109 | 70 | 12 | 0 |  
| OW | 0 | 167 | 0 | 192 | 134 | 42 | 7 | 0 |  
| VODI | 0 | 146 | 0 | 291 | 377 | 216 | 130 | 17 |  
| ODI | 0 | 66 | 0 | 255 | 380 | 377 | 273 | 67 |  
| CDI | 0 | 38 | 0 | 172 | 360 | 530 | 505 | 260 |  
| VCDI | 0 | 50 | 0 | 289 | 1133 | 2640 | 3815 | 2220 |  | 
 Date: 2021-05-27:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 8278 | 6371 | 0 | 321 | 256 | 99 | 47 | 0 |  
| OW | 0 | 225 | 0 | 215 | 196 | 74 | 39 | 0 |  
| VODI | 0 | 191 | 0 | 259 | 452 | 269 | 101 | 22 |  
| ODI | 0 | 137 | 0 | 250 | 373 | 355 | 144 | 132 |  
| CDI | 0 | 78 | 0 | 203 | 381 | 628 | 262 | 392 |  
| VCDI | 0 | 108 | 0 | 523 | 1018 | 2789 | 2413 | 2801 |  | 
 Date: 2021-05-29:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 7911 | 6895 | 0 | 365 | 262 | 100 | 68 | 0 |  
| OW | 0 | 176 | 0 | 217 | 288 | 128 | 55 | 1 |  
| VODI | 0 | 212 | 0 | 286 | 488 | 273 | 116 | 33 |  
| ODI | 0 | 149 | 0 | 224 | 331 | 287 | 227 | 179 |  
| CDI | 0 | 103 | 0 | 221 | 335 | 624 | 508 | 386 |  
| VCDI | 0 | 101 | 0 | 507 | 1013 | 2860 | 2401 | 2072 |  | 
 Date: 2021-05-31:
 | Forecast | 
 | 
|  | observations |  
|  | Ice free | Ice free near MIZ
 | OW | VODI | ODI | CDI | VCDI near MIZ
 | VCDI |  
| m o
 d
 e
 l
 | Ice free | 7700 | 7225 | 0 | 435 | 235 | 154 | 69 | 0 |  
| OW | 0 | 229 | 0 | 264 | 251 | 125 | 58 | 0 |  
| VODI | 0 | 188 | 0 | 334 | 479 | 291 | 143 | 13 |  
| ODI | 0 | 148 | 0 | 264 | 406 | 304 | 285 | 156 |  
| CDI | 0 | 133 | 0 | 260 | 372 | 580 | 608 | 417 |  
| VCDI | 0 | 102 | 0 | 432 | 924 | 2330 | 2863 | 1625 |  | 
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