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: 2025-09-18

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

Model vs. observations, sea ice class contingency tables

Date: 2025-09-12:

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 12246 4702 17 1 0 0 0 0
OW 0 1026 362 557 50 0 0 0
VODI 0 15 72 1711 743 12 0 0
ODI 0 0 0 86 1606 417 0 0
CDI 0 0 0 0 548 7777 213 0
VCDI 0 0 0 0 3 615 317 0
...date precedes bulletin

Date: 2025-09-14:

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 12161 4695 12 4 0 0 0 0
OW 0 1105 334 602 41 0 0 0
VODI 0 63 113 1605 861 16 0 0
ODI 0 0 0 79 1236 422 0 0
CDI 0 0 0 0 531 5983 19 0
VCDI 0 0 0 0 3 2981 230 0
...date precedes bulletin

Date: 2025-09-16:

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 12216 5229 55 6 0 0 0 0
OW 0 621 402 666 7 0 0 0
VODI 0 0 8 1325 366 0 0 0
ODI 0 0 0 68 1159 44 0 0
CDI 0 0 0 3 764 6742 183 0
VCDI 0 0 0 0 11 1517 1704 0
...date precedes bulletin

Date: 2025-09-18:

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 12506 5147 50 5 0 0 0 0
OW 0 783 324 506 25 0 0 0
VODI 0 37 68 1216 406 8 0 0
ODI 0 8 5 142 900 156 0 0
CDI 0 0 3 38 409 6191 77 0
VCDI 0 0 0 0 66 3409 611 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12506 5179 86 14 0 0 0 0
OW 0 762 294 493 20 0 0 0
VODI 0 27 62 1198 363 8 0 0
ODI 0 7 6 167 922 152 0 0
CDI 0 0 2 35 425 6029 165 0
VCDI 0 0 0 0 76 3575 523 0

Date: 2025-09-20:

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 12842 4921 23 4 0 0 0 0
OW 0 816 313 489 42 0 0 0
VODI 0 81 85 871 597 51 0 0
ODI 0 19 11 130 620 500 0 0
CDI 0 1 7 42 344 4784 984 0
VCDI 0 0 0 0 0 3866 653 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12842 5021 58 18 0 0 0 0
OW 0 745 284 480 49 0 0 0
VODI 0 54 82 853 531 51 0 0
ODI 0 17 9 138 650 474 0 0
CDI 0 1 6 47 369 4759 763 0
VCDI 0 0 0 0 4 3917 874 0

Date: 2025-09-22:

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 12548 5374 148 55 0 0 0 0
OW 0 222 210 675 53 0 0 0
VODI 0 6 21 490 534 70 0 0
ODI 0 0 0 28 625 253 12 0
CDI 0 0 0 0 282 1549 55 0
VCDI 0 0 0 0 3 2721 6999 163
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12548 5129 100 57 0 0 0 0
OW 0 462 226 523 146 0 0 0
VODI 0 11 53 582 676 271 8 0
ODI 0 0 0 78 482 626 72 0
CDI 0 0 0 8 193 1553 596 0
VCDI 0 0 0 0 0 2143 6390 163

Date: 2025-09-24:

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 12393 5391 105 34 0 0 0 0
OW 0 248 261 574 8 0 0 0
VODI 0 0 14 565 414 20 0 0
ODI 0 0 0 95 646 154 0 0
CDI 0 0 0 0 394 1233 149 0
VCDI 0 0 0 0 19 1642 7456 1281
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12393 5004 78 69 0 0 0 0
OW 0 602 195 443 114 1 0 0
VODI 0 33 107 559 543 125 0 0
ODI 0 0 0 190 548 593 18 0
CDI 0 0 0 7 253 1084 675 0
VCDI 0 0 0 0 23 1246 6912 1281

Date: 2025-09-26:

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


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