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

Validation of sea ice concentration - American sector

Bulletin date: 2025-06-24

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

Model vs. observations, sea ice class contingency tables

Date: 2025-06-24:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 832 3161 1 45 24 7 4 0
OW 107 785 4 64 25 24 5 0
VODI 98 1101 15 173 186 232 37 0
ODI 33 706 22 435 731 1003 224 5
CDI 9 490 20 559 2430 4720 2075 234
VCDI 0 75 5 202 4655 11382 7609 1003

Date: 2025-06-26:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 1680 4839 32 219 85 61 13 0
OW 7 166 1 59 44 63 10 0
VODI 9 298 11 175 237 284 47 0
ODI 3 390 20 422 591 1253 169 26
CDI 3 408 28 697 1566 5334 1043 428
VCDI 0 139 5 439 2521 14871 5077 1784

Date: 2025-06-28:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 2146 5150 20 284 208 114 16 0
OW 0 133 4 61 59 58 12 0
VODI 0 248 11 176 228 340 20 0
ODI 0 418 35 462 531 1239 103 15
CDI 0 574 27 987 1289 5008 940 309
VCDI 0 373 7 657 2349 15223 4495 1228

Date: 2025-06-30:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 2649 5101 30 337 251 169 40 0
OW 1 121 3 58 106 57 9 0
VODI 0 252 11 176 320 342 17 0
ODI 1 449 33 399 777 1089 110 13
CDI 0 649 53 963 1668 4407 851 209
VCDI 0 360 43 777 3247 14952 3675 782


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