Description of algorithm
Full domain
  Ice concntr, edge pos
  Contingency tables
American sector
European sector
Asian sector

Validation of sea ice concentration - Full domain

Bulletin date: 2023-01-19

Data source: OSI SAF N.H. AMSR sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2023-01-13:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57885 23009 7250 248 102 63 54 0
OW 79 614 407 182 74 39 31 0
VODI 1 414 380 326 178 57 13 0
ODI 0 105 189 296 248 101 33 0
CDI 0 64 106 269 340 310 153 0
VCDI 0 49 207 627 1201 5749 38905 46690
...date precedes bulletin

Date: 2023-01-15:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57598 22434 7107 567 84 71 37 0
OW 63 379 696 224 95 40 27 0
VODI 0 236 584 283 199 62 34 0
ODI 0 91 378 255 212 98 47 0
CDI 0 57 185 303 311 323 149 0
VCDI 0 102 258 718 1450 6347 35691 49253
...date precedes bulletin

Date: 2023-01-17:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55475 23655 7986 713 116 42 22 0
OW 63 349 480 367 66 24 8 0
VODI 0 185 358 514 271 73 18 0
ODI 0 72 198 297 295 162 16 0
CDI 0 51 170 258 379 370 69 1
VCDI 0 38 342 567 1495 7022 33059 51402
...date precedes bulletin

Date: 2023-01-19:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 54236 25217 8309 209 50 34 20 0
OW 64 536 374 229 83 14 9 0
VODI 0 349 284 413 210 76 5 0
ODI 0 171 149 289 223 150 8 0
CDI 0 112 110 285 301 258 58 11
VCDI 0 174 249 634 1650 5877 30760 54858
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 54237 25254 8333 218 54 35 20 0
OW 63 483 326 200 76 13 10 0
VODI 0 370 287 374 177 83 4 0
ODI 0 189 156 331 234 132 11 0
CDI 0 102 121 286 318 252 58 11
VCDI 0 161 252 650 1658 5894 30757 54858

Date: 2023-01-21:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58786 24593 4113 324 94 40 13 0
OW 75 564 331 284 114 44 14 0
VODI 0 422 259 396 277 113 13 0
ODI 0 210 116 310 285 151 17 0
CDI 0 169 81 309 319 369 177 0
VCDI 0 250 375 678 1366 5623 33405 51969
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58785 24624 4099 343 113 45 8 0
OW 76 504 329 257 99 57 24 0
VODI 0 436 257 360 217 96 10 0
ODI 0 236 133 320 308 133 18 0
CDI 0 184 90 337 334 355 187 0
VCDI 0 224 367 684 1384 5654 33392 51969

Date: 2023-01-23:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57190 24161 6451 440 93 16 0 0
OW 74 343 350 348 96 23 0 0
VODI 0 202 270 743 458 61 3 0
ODI 0 135 135 339 507 144 0 0
CDI 0 110 148 304 434 470 90 0
VCDI 0 168 160 516 1113 6663 28724 55566
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57188 23580 6075 473 136 39 0 0
OW 76 478 339 216 138 48 3 0
VODI 0 322 361 535 333 118 0 0
ODI 0 255 185 323 357 140 13 0
CDI 0 202 180 316 314 346 172 0
VCDI 0 282 374 827 1423 6686 28629 55566

Date: 2023-01-25:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55633 22990 8645 830 105 23 1 0
OW 73 276 279 350 159 23 4 0
VODI 0 273 258 561 410 63 14 0
ODI 0 156 122 313 457 140 24 0
CDI 0 101 134 323 555 447 209 5
VCDI 0 176 174 716 1618 7751 30998 51659
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55628 22375 8272 620 133 43 4 0
OW 78 474 279 184 102 68 21 0
VODI 0 397 327 483 254 101 27 0
ODI 0 245 226 439 450 133 56 0
CDI 0 177 213 364 453 367 186 40
VCDI 0 304 295 1003 1912 7735 30956 51624

Date: 2023-01-27:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55096 26031 5431 1052 181 21 9 0
OW 63 243 214 301 217 50 16 0
VODI 0 228 140 461 352 129 20 0
ODI 0 149 107 322 477 228 41 0
CDI 0 56 78 256 511 557 289 0
VCDI 0 104 91 453 1649 6991 29326 55108
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55108 25345 5136 855 150 61 12 0
OW 51 392 258 189 83 65 39 0
VODI 0 331 180 356 181 84 58 0
ODI 0 270 114 277 345 172 100 0
CDI 0 213 114 326 587 458 258 15
VCDI 0 260 259 842 2041 7136 29234 55093


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