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: 2025-11-18

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

Model vs. observations, sea ice class contingency tables

Date: 2025-11-18:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 8585 2175 9 58 25 0 0 0
OW 4 146 4 25 12 0 0 0
VODI 2 292 6 72 47 6 0 0
ODI 0 198 18 172 153 38 4 0
CDI 0 147 12 231 388 225 170 4
VCDI 0 69 6 160 964 3053 13888 14189

Date: 2025-11-20:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 8507 2238 13 127 85 17 0 0
OW 1 119 6 26 10 7 0 0
VODI 1 215 8 50 19 28 1 0
ODI 0 204 11 90 53 36 2 0
CDI 0 188 3 220 161 178 146 19
VCDI 0 192 12 339 935 3676 13922 13692

Date: 2025-11-22:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 8455 2070 31 212 167 102 16 0
OW 3 69 2 30 15 26 0 0
VODI 0 143 4 64 41 47 2 0
ODI 0 99 6 72 47 69 5 0
CDI 0 104 10 159 187 251 255 1
VCDI 0 91 13 230 994 3330 13465 14670

Date: 2025-11-24:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 8464 1817 26 253 219 279 50 0
OW 4 56 2 27 22 42 7 0
VODI 0 99 0 48 30 70 20 0
ODI 0 79 6 53 61 85 20 0
CDI 0 56 3 117 161 332 401 30
VCDI 0 44 4 173 1002 2586 11263 17546


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