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: 2025-10-28

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

Model vs. observations, sea ice class contingency tables

Date: 2025-10-28:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 59790 8876 31 165 21 4 0 0
OW 47 382 13 96 27 4 0 0
VODI 67 667 21 378 108 7 4 0
ODI 131 702 33 507 298 71 12 0
CDI 57 348 24 604 1006 568 450 82
VCDI 0 136 27 564 2439 11732 35641 8292

Date: 2025-10-30:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58314 10295 26 268 112 29 6 0
OW 9 346 10 65 27 29 8 0
VODI 14 526 24 199 89 56 19 0
ODI 4 531 39 361 244 139 28 0
CDI 0 351 19 434 476 625 647 146
VCDI 0 181 18 457 1354 10724 35213 11970

Date: 2025-11-01:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 56102 12343 35 329 119 13 0 0
OW 2 283 7 65 24 10 0 0
VODI 4 480 17 168 45 18 15 0
ODI 0 612 32 229 105 49 52 0
CDI 0 491 27 453 371 449 546 176
VCDI 0 245 31 657 1395 6572 30062 21799

Date: 2025-11-03:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57305 10736 26 350 160 23 2 0
OW 8 248 5 77 43 4 0 0
VODI 12 388 12 131 123 15 5 0
ODI 2 410 19 187 177 58 45 0
CDI 0 512 28 403 482 260 487 39
VCDI 0 622 40 611 1651 7208 32144 19374


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