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: 2025-07-17

Model: GLO MFC - NEMO

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

Model vs. observations, sea ice class contingency tables

Date: 2025-07-11:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 86058 10863 431 496 23 0 0 0
OW 0 222 130 400 59 0 0 0
VODI 0 165 97 826 740 40 37 0
ODI 0 52 25 256 1400 436 82 0
CDI 0 11 18 49 645 4328 350 0
VCDI 0 0 0 0 3 209 636 0

Date: 2025-07-13:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 86415 10791 523 751 65 0 0 0
OW 0 132 111 390 118 1 0 0
VODI 0 138 87 682 811 72 43 0
ODI 0 82 51 291 1277 509 63 0
CDI 0 1 0 16 565 4700 243 0
VCDI 0 0 0 0 0 146 13 0

Date: 2025-07-15:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87051 10409 547 796 91 0 0 0
OW 0 162 158 475 145 5 0 0
VODI 0 59 54 644 847 113 4 0
ODI 0 64 43 212 971 703 24 0
CDI 0 0 4 14 342 5001 100 0
VCDI 0 0 0 0 5 40 4 0

Date: 2025-07-17:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87596 9966 629 863 102 0 0 0
OW 0 185 114 607 247 2 0 0
VODI 0 29 48 504 773 101 6 0
ODI 0 34 36 113 932 825 21 0
CDI 0 0 1 9 238 4811 249 0
VCDI 0 0 0 1 0 41 4 0

Date: 2025-07-19:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87894 10078 625 743 31 0 0 0
OW 0 201 133 667 194 0 0 0
VODI 0 26 54 490 659 78 6 0
ODI 0 13 16 47 841 800 37 0
CDI 0 0 0 1 249 4665 493 0
VCDI 0 0 0 0 0 41 5 0

Date: 2025-07-21:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 88996 9292 560 796 38 0 0 0
OW 0 182 119 569 204 5 0 0
VODI 0 16 43 379 625 99 1 0
ODI 0 3 4 20 721 632 55 0
CDI 0 0 0 0 378 4137 1160 0
VCDI 0 0 0 0 0 29 24 0

Date: 2025-07-23:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 90259 8112 507 744 29 0 0 0
OW 0 158 124 576 192 2 0 0
VODI 0 25 46 436 588 57 6 0
ODI 0 0 0 29 881 476 106 0
CDI 0 0 0 0 672 4615 376 0
VCDI 0 0 0 0 0 50 21 0

Date: 2025-07-25:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 90584 8000 496 677 7 0 0 0
OW 0 137 120 533 176 2 0 0
VODI 0 26 29 414 695 87 6 0
ODI 0 0 0 28 1052 833 94 0
CDI 0 0 0 0 298 4588 139 0
VCDI 0 0 0 0 0 63 3 0


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