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: 2025-06-26

Model: GLO MFC - NEMO

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

Model vs. observations, sea ice class contingency tables

Date: 2025-06-20:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 79781 12923 410 476 32 0 0 0
OW 0 341 94 387 68 0 0 0
VODI 0 374 132 700 548 82 7 0
ODI 0 297 144 474 891 637 139 0
CDI 0 4 9 50 230 972 1736 0
VCDI 0 0 0 4 38 127 4076 2901

Date: 2025-06-22:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80299 12868 460 394 39 0 0 0
OW 0 286 129 419 62 0 0 0
VODI 0 379 141 610 535 69 13 0
ODI 0 160 122 446 927 618 84 0
CDI 0 5 11 34 234 1657 1052 0
VCDI 0 0 0 2 29 215 5291 1494

Date: 2025-06-24:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80507 13147 401 465 37 2 0 0
OW 0 311 105 405 87 2 0 0
VODI 0 290 126 521 489 69 7 0
ODI 0 104 82 457 986 532 98 0
CDI 0 15 12 35 219 1216 1350 0
VCDI 0 0 0 2 21 336 5200 1448

Date: 2025-06-26:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 81081 13129 380 438 51 0 0 0
OW 0 304 84 275 48 3 0 0
VODI 0 249 120 534 470 70 12 0
ODI 0 116 108 439 924 508 172 0
CDI 0 14 14 36 292 1808 990 0
VCDI 0 0 0 0 24 1661 3795 935

Date: 2025-06-28:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 82706 12125 341 400 53 0 0 0
OW 0 347 87 235 45 1 0 0
VODI 0 243 82 484 530 66 0 0
ODI 0 113 101 358 1037 595 146 0
CDI 0 11 16 50 432 1735 871 0
VCDI 0 0 0 0 3 950 4456 465

Date: 2025-06-30:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 83418 11955 282 342 40 0 0 0
OW 0 384 81 217 71 2 0 0
VODI 0 243 86 429 475 56 0 0
ODI 0 148 73 286 1079 840 95 0
CDI 0 12 14 97 240 1538 1050 0
VCDI 0 0 0 0 6 327 5121 77

Date: 2025-07-02:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 83694 12040 303 280 28 0 0 0
OW 0 436 72 211 78 1 0 0
VODI 0 187 69 414 569 119 1 0
ODI 0 133 77 263 1195 830 85 0
CDI 0 17 42 122 672 1607 530 0
VCDI 0 0 0 1 11 884 3939 174

Date: 2025-07-04:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 84716 11139 301 326 25 3 0 0
OW 0 408 68 252 88 3 0 0
VODI 0 169 63 546 890 134 1 0
ODI 0 203 88 286 1019 974 154 0
CDI 0 2 18 88 1284 1292 771 0
VCDI 0 0 0 0 6 1679 2088 0


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