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: 2025-09-04

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

Model vs. observations, sea ice class contingency tables

Date: 2025-08-29:

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 12607 4455 24 8 0 0 0 0
OW 25 1323 356 306 0 0 0 0
VODI 0 25 88 1898 499 0 0 0
ODI 0 0 0 133 4543 726 0 0
CDI 0 0 0 0 1493 4587 0 0
VCDI 0 0 0 0 0 0 0 0
...date precedes bulletin

Date: 2025-08-31:

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 12639 4193 14 8 0 0 0 0
OW 4 1525 309 239 0 0 0 0
VODI 0 74 178 1967 616 0 0 0
ODI 0 0 0 211 5533 975 0 0
CDI 0 0 0 0 1576 3035 0 0
VCDI 0 0 0 0 0 0 0 0
...date precedes bulletin

Date: 2025-09-02:

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 12495 4735 26 9 0 0 0 0
OW 0 1027 449 588 0 0 0 0
VODI 0 4 29 1877 612 0 0 0
ODI 0 0 0 73 7021 252 0 0
CDI 0 0 0 0 1012 2885 0 0
VCDI 0 0 0 0 0 2 0 0
...date precedes bulletin

Date: 2025-09-04:

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 12410 4594 33 6 0 0 0 0
OW 0 1257 377 471 0 0 0 0
VODI 0 37 82 2046 541 0 0 0
ODI 0 0 0 84 6329 571 0 0
CDI 0 0 0 0 918 3340 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12410 4624 40 7 0 0 0 0
OW 0 1237 374 488 0 0 0 0
VODI 0 27 78 2003 541 0 0 0
ODI 0 0 0 109 6275 697 0 0
CDI 0 0 0 0 972 3205 0 0
VCDI 0 0 0 0 0 9 0 0

Date: 2025-09-06:

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 12385 4342 12 0 0 0 0 0
OW 0 1348 382 372 3 0 0 0
VODI 0 63 103 2190 619 2 0 0
ODI 0 0 0 75 5680 1004 0 0
CDI 0 0 0 0 783 3733 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12385 4426 16 1 0 0 0 0
OW 0 1291 392 478 3 0 0 0
VODI 0 36 89 2020 620 3 0 0
ODI 0 0 0 138 5618 1253 0 0
CDI 0 0 0 0 844 3483 0 0
VCDI 0 0 0 0 0 0 0 0

Date: 2025-09-08:

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 12358 4750 27 4 0 0 0 0
OW 0 985 401 663 1 0 0 0
VODI 0 0 12 1829 570 0 0 0
ODI 0 0 0 139 3838 22 0 0
CDI 0 0 0 0 2046 5240 0 0
VCDI 0 0 0 0 3 208 0 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12358 4143 12 2 0 0 0 0
OW 0 1532 313 461 9 0 0 0
VODI 0 60 115 1961 664 12 0 0
ODI 0 0 0 211 4634 1531 0 0
CDI 0 0 0 0 1151 3927 0 0
VCDI 0 0 0 0 0 0 0 0

Date: 2025-09-10:

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 12291 4766 26 1 0 0 0 0
OW 0 921 381 642 10 0 0 0
VODI 0 0 17 1877 545 4 0 0
ODI 0 0 0 120 2668 291 0 0
CDI 0 0 0 0 1364 7064 0 0
VCDI 0 0 0 0 0 108 0 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12291 4071 10 0 0 0 0 0
OW 0 1550 290 574 32 0 0 0
VODI 0 66 124 1771 821 88 0 0
ODI 0 0 0 295 2611 2041 0 0
CDI 0 0 0 0 1123 5338 0 0
VCDI 0 0 0 0 0 0 0 0

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
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12246 4172 22 8 0 0 0 0
OW 0 1449 305 695 147 5 0 0
VODI 0 122 122 1367 940 224 0 0
ODI 0 0 2 285 1118 1838 2 0
CDI 0 0 0 0 745 6504 327 0
VCDI 0 0 0 0 0 250 201 0


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