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: 2025-04-29

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

Model vs. observations, sea ice class contingency tables

Date: 2025-04-29:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17055 14368 122 802 235 16 0 0
OW 20 283 15 167 60 11 0 0
VODI 25 490 17 373 233 77 58 3
ODI 0 293 24 591 627 713 575 69
CDI 0 110 14 627 1695 2262 2894 813
VCDI 0 24 6 279 1793 6590 32105 48011

Date: 2025-05-01:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17686 14278 132 1148 330 35 2 0
OW 1 111 14 180 91 25 2 0
VODI 0 180 17 396 298 172 108 1
ODI 0 177 12 521 688 878 644 86
CDI 0 51 9 514 1633 2621 3166 757
VCDI 0 47 4 376 2151 7513 29731 47759

Date: 2025-05-03:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17945 14347 166 1155 349 39 3 1
OW 5 108 9 160 124 40 7 5
VODI 8 160 20 287 348 205 123 34
ODI 10 144 24 522 758 958 674 143
CDI 14 69 22 551 1800 2967 2942 889
VCDI 30 28 9 439 2377 8447 27368 47712

Date: 2025-05-05:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17747 14619 150 1379 414 87 8 10
OW 6 108 6 178 199 89 20 22
VODI 5 155 16 376 417 302 150 44
ODI 1 122 18 449 1022 1056 692 181
CDI 9 84 24 454 2018 3175 2858 1001
VCDI 29 40 8 390 2315 8538 25204 48350


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