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: 2025-05-27

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

Model vs. observations, sea ice class contingency tables

Date: 2025-05-27:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 161 12 136 22 4 0 0
OW 0 135 4 87 37 7 2 0
VODI 0 399 19 300 247 155 33 10
ODI 0 158 20 408 526 548 452 117
CDI 0 20 8 221 576 1414 3158 1507
VCDI 0 11 1 192 1230 5616 14612 13028

Date: 2025-05-29:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 692 35 242 170 35 0 0
OW 0 102 6 63 87 26 4 0
VODI 0 203 1 181 250 150 76 9
ODI 0 113 11 242 455 415 546 139
CDI 0 71 8 287 741 1378 3386 1521
VCDI 0 53 7 305 1881 4166 15878 11658

Date: 2025-05-31:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 965 34 313 223 34 10 0
OW 0 67 0 72 76 29 5 0
VODI 0 167 3 129 269 144 74 6
ODI 0 106 5 216 456 453 409 139
CDI 0 96 5 275 744 1872 3245 1988
VCDI 0 76 5 390 1125 5147 12862 13359

Date: 2025-06-02:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 995 32 485 299 36 1 0
OW 0 55 3 70 95 26 2 0
VODI 0 98 5 152 318 140 34 7
ODI 0 108 3 243 563 542 447 114
CDI 0 142 3 408 895 1896 3339 1750
VCDI 0 95 2 313 1346 4023 11539 14969


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