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: 2025-08-05

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

Model vs. observations, sea ice class contingency tables

Date: 2025-08-05:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11062 3580 17 77 19 0 0 0
OW 26 633 10 67 18 4 1 0
VODI 6 887 19 261 112 117 17 0
ODI 0 710 115 1356 835 871 263 0
CDI 0 458 77 1680 2305 2789 1504 0
VCDI 0 67 12 957 3079 5710 5821 15

Date: 2025-08-07:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11260 5117 48 331 84 5 1 0
OW 0 125 16 83 24 6 3 0
VODI 0 211 18 261 125 117 15 0
ODI 0 429 72 1131 879 777 245 19
CDI 0 393 101 1535 2544 2493 1799 206
VCDI 0 108 26 1078 3239 5308 4454 871

Date: 2025-08-09:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11240 5333 71 435 93 0 1 0
OW 0 91 9 75 13 1 5 0
VODI 0 197 18 271 139 80 66 0
ODI 0 461 68 1133 822 635 402 3
CDI 0 491 93 1561 2090 2787 1910 111
VCDI 0 331 49 1038 2192 5093 5312 837

Date: 2025-08-11:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11489 5257 59 426 96 12 0 0
OW 0 109 14 70 16 5 0 0
VODI 0 212 27 275 130 104 35 0
ODI 0 492 85 1201 909 767 257 0
CDI 0 620 87 1740 2382 3024 1526 6
VCDI 0 331 61 1030 2327 6109 4259 8


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