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

Validation of sea ice concentration - Full domain

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 70555 13575 303 336 3 0 0 0
OW 0 349 108 407 45 0 0 0
VODI 0 476 264 1269 781 33 20 0
ODI 0 247 148 1657 4179 903 88 0
CDI 0 50 28 278 3430 8978 2189 34
VCDI 0 1 0 58 615 3116 24420 48096

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 71285 13120 350 310 1 0 0 0
OW 0 312 122 426 33 1 0 0
VODI 0 498 296 1644 743 58 39 0
ODI 0 377 294 1846 4465 1236 107 0
CDI 0 14 24 407 3461 8611 2512 61
VCDI 0 0 0 3 82 3362 26592 44347

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 71788 12997 364 314 0 0 0 0
OW 0 393 141 551 18 0 0 0
VODI 0 546 286 1888 768 62 39 0
ODI 0 440 238 1848 5304 1201 82 4
CDI 0 5 14 386 3420 9635 2477 97
VCDI 0 0 0 17 169 4243 31835 35469

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 71549 13542 549 512 1 0 0 0
OW 0 344 162 464 26 0 0 0
VODI 0 580 369 2124 922 51 17 0
ODI 0 445 332 2063 5175 1180 72 17
CDI 0 0 6 230 2675 8860 4530 315
VCDI 0 0 0 0 35 3232 36927 29733

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 71463 14001 448 689 6 0 0 0
OW 0 348 120 638 77 0 0 0
VODI 0 733 289 2351 922 30 0 0
ODI 0 607 336 2097 5064 1087 105 7
CDI 0 15 12 303 2886 9060 3654 294
VCDI 0 4 1 2 136 2528 31222 35504

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 71639 14197 538 871 76 0 0 0
OW 0 398 122 779 59 0 0 0
VODI 0 654 328 2376 758 43 13 0
ODI 0 699 312 1927 5300 1210 113 10
CDI 0 6 8 312 2419 9529 2961 162
VCDI 0 0 0 0 39 3332 32320 33529

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 71825 14210 545 1097 182 0 0 0
OW 0 370 182 754 76 1 0 0
VODI 0 544 359 2314 890 49 11 0
ODI 0 627 247 1813 5373 1328 218 26
CDI 0 24 17 391 2567 10338 3174 163
VCDI 0 0 0 0 51 3734 28299 35240

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 14249 629 1206 42 0 0 0
OW 0 323 179 818 157 1 0 0
VODI 0 649 376 2260 832 73 5 0
ODI 0 638 236 1875 5747 1435 128 0
CDI 0 28 26 431 2536 11117 3864 262
VCDI 0 0 0 0 53 3214 26877 34822


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