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: 2025-11-11

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

Model vs. observations, sea ice class contingency tables

Date: 2025-11-11:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 51039 9035 7 32 1 3 0 0
OW 56 374 7 26 11 3 0 0
VODI 73 771 13 91 37 13 0 0
ODI 45 2114 41 528 210 63 3 2
CDI 10 1192 31 669 784 295 271 38
VCDI 0 301 17 629 2208 5909 28261 29219

Date: 2025-11-13:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 49735 10099 31 198 80 15 0 0
OW 68 321 7 43 24 15 0 0
VODI 85 524 7 78 84 36 1 0
ODI 41 594 14 139 104 59 7 0
CDI 13 1106 35 512 582 296 224 50
VCDI 0 1826 57 1056 1906 7038 27847 29475

Date: 2025-11-15:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 50152 9339 45 290 111 37 8 0
OW 67 244 2 61 56 15 2 0
VODI 69 335 9 100 70 33 3 0
ODI 72 401 6 119 113 50 6 0
CDI 76 444 28 269 310 359 222 31
VCDI 280 2715 80 1098 1961 8569 33228 22947

Date: 2025-11-17:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 49778 9344 34 340 167 44 10 0
OW 57 279 0 33 38 15 0 0
VODI 69 419 4 43 60 41 1 0
ODI 35 391 26 102 119 118 2 0
CDI 39 468 13 205 392 454 178 9
VCDI 292 2275 76 1098 2430 11152 31141 22641


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