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

Validation of sea ice concentration - European sector

Reference date: 2025-05-15

Model: GLO MFC - NEMO

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

Model vs. observations, sea ice class contingency tables

Date: 2025-05-09:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 70527 13123 285 314 0 0 0 0
OW 0 314 104 357 40 0 0 0
VODI 0 388 253 1042 615 23 0 0
ODI 0 123 86 879 2921 792 32 0
CDI 0 12 8 56 1420 4262 1290 0
VCDI 0 0 0 0 72 679 6342 2732

Date: 2025-05-11:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71258 12690 325 288 1 0 0 0
OW 0 269 108 379 33 0 0 0
VODI 0 371 224 1347 664 48 0 0
ODI 0 116 110 927 3045 1059 39 0
CDI 0 4 6 156 1751 3671 948 0
VCDI 0 0 0 3 43 1225 6045 1938

Date: 2025-05-13:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71740 12535 330 262 0 0 0 0
OW 0 336 129 490 13 0 0 0
VODI 0 378 217 1616 614 47 4 0
ODI 0 127 93 917 3524 813 1 0
CDI 0 1 2 114 1335 3870 970 1
VCDI 0 0 0 0 4 706 6600 1302

Date: 2025-05-15:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71544 12945 501 475 1 0 0 0
OW 0 287 143 388 26 0 0 0
VODI 0 396 295 1747 758 43 0 0
ODI 0 127 115 948 3236 888 0 0
CDI 0 0 1 77 1126 3762 1098 5
VCDI 0 0 0 0 4 553 6357 1245

Date: 2025-05-17:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71452 13313 410 630 6 0 0 0
OW 0 267 99 562 67 0 0 0
VODI 0 426 195 1933 740 14 0 0
ODI 0 197 88 828 3349 813 17 0
CDI 0 0 1 91 1008 3763 909 5
VCDI 0 0 0 0 0 385 5954 1569

Date: 2025-05-19:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71637 13545 494 792 76 0 0 0
OW 0 296 92 709 56 0 0 0
VODI 0 354 169 1715 586 39 9 0
ODI 0 285 102 664 3520 752 36 0
CDI 0 6 5 67 849 3433 956 30
VCDI 0 0 0 0 0 1042 4388 2387

Date: 2025-05-21:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71804 13535 482 999 182 0 0 0
OW 0 229 112 685 72 0 0 0
VODI 0 203 171 1509 724 13 9 0
ODI 0 176 98 621 3508 782 58 0
CDI 0 0 0 94 777 3619 1039 13
VCDI 0 0 0 0 3 668 5341 1565

Date: 2025-05-23:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71951 13520 542 1100 42 0 0 0
OW 0 149 118 698 152 0 0 0
VODI 0 258 151 1426 725 32 4 0
ODI 0 217 94 633 3475 872 38 0
CDI 0 0 0 82 782 4260 648 10
VCDI 0 0 0 0 3 468 3079 3562


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