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

Validation of sea ice concentration - Asian sector

Bulletin date: 2025-06-19

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-06-13:

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 403 2072 41 39 2 2 0 0
OW 13 1097 299 298 32 1 0 0
VODI 10 139 139 1293 452 26 7 0
ODI 0 5 6 343 1603 424 43 0
CDI 0 0 1 37 1067 4169 2473 34
VCDI 0 0 0 0 371 859 5544 9752
...date precedes bulletin

Date: 2025-06-15:

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 366 2171 34 42 13 0 2 0
OW 0 1143 267 285 32 0 0 0
VODI 0 167 182 1276 496 42 5 0
ODI 0 9 9 455 1502 431 100 0
CDI 0 0 2 68 1156 3209 2358 20
VCDI 0 0 0 0 420 1972 7316 7546
...date precedes bulletin

Date: 2025-06-17:

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 371 2706 47 55 19 2 0 0
OW 0 957 378 328 6 0 0 0
VODI 0 16 70 1619 399 3 2 0
ODI 0 1 1 162 1990 149 13 0
CDI 0 0 0 12 1262 3100 345 0
VCDI 0 0 0 0 102 1810 8291 8880
...date precedes bulletin

Date: 2025-06-19:

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 398 2787 30 40 18 0 0 0
OW 0 1239 262 306 11 0 0 0
VODI 0 225 242 1413 385 8 2 0
ODI 0 0 4 354 1588 226 5 0
CDI 0 0 0 63 1666 3034 393 0
VCDI 0 0 0 0 79 3212 8348 6758
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 398 2962 39 53 17 0 0 0
OW 0 1101 275 303 10 0 0 0
VODI 0 188 223 1356 374 20 2 0
ODI 0 0 1 407 1598 209 9 0
CDI 0 0 0 57 1602 2931 301 0
VCDI 0 0 0 0 146 3320 8436 6758

Date: 2025-06-21:

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 685 2517 28 37 18 0 0 0
OW 12 1393 246 253 0 2 0 0
VODI 0 371 308 1320 391 31 0 0
ODI 0 6 17 465 1265 249 2 0
CDI 0 0 3 97 1569 3517 979 87
VCDI 0 0 0 0 196 2901 6234 7897
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 697 2645 33 46 18 0 0 0
OW 0 1320 236 247 4 3 0 0
VODI 0 312 299 1229 390 38 1 0
ODI 0 10 33 542 1292 266 19 0
CDI 0 0 1 108 1476 3211 800 339
VCDI 0 0 0 0 259 3182 6395 7645

Date: 2025-06-23:

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 833 2794 60 62 24 0 0 0
OW 0 1194 273 328 10 6 0 0
VODI 0 368 243 1200 358 39 6 0
ODI 0 6 24 551 1148 271 25 0
CDI 0 0 0 143 2389 3533 1302 380
VCDI 0 0 0 0 711 3195 7500 4120
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 833 2650 43 49 21 0 0 0
OW 0 1305 271 289 8 4 0 0
VODI 0 403 259 1247 353 32 5 0
ODI 0 4 27 557 1233 325 32 0
CDI 0 0 0 140 2318 3612 1140 395
VCDI 0 0 0 2 707 3071 7656 4105

Date: 2025-06-25:

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 944 3504 90 74 17 0 0 0
OW 0 712 494 467 20 3 0 0
VODI 0 23 58 1439 514 43 5 0
ODI 0 0 0 206 1436 486 18 0
CDI 0 0 0 17 1309 6650 2186 45
VCDI 0 0 0 0 408 1252 8041 2635
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 944 2679 78 68 18 0 0 0
OW 0 1202 321 408 20 0 0 0
VODI 0 357 198 1128 501 32 9 0
ODI 0 1 45 390 1053 484 40 0
CDI 0 0 0 209 1305 5989 4883 531
VCDI 0 0 0 0 807 1929 5318 2149

Date: 2025-06-27:

Best estimate Forecast
...observations not yet available ...observations not yet available


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