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: 2025-06-19

Model: GLO MFC - NEMO

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

Model vs. observations, sea ice class contingency tables

Date: 2025-06-13:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 78136 18329 686 1032 137 1 0 0
OW 0 881 285 672 164 10 1 0
VODI 0 1483 341 1457 1483 1059 89 0
ODI 0 1289 484 2065 3952 2739 650 0
CDI 0 182 83 353 2286 9673 6286 0
VCDI 0 3 6 12 914 7513 25399 16894

Date: 2025-06-15:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 78599 18823 878 1121 120 3 0 0
OW 0 926 226 767 211 8 0 0
VODI 0 1514 401 1631 1648 870 40 0
ODI 0 1130 438 1935 3801 3257 579 0
CDI 0 165 60 278 2829 10807 6062 0
VCDI 0 1 2 6 1861 8514 26107 11411

Date: 2025-06-17:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 78756 20154 853 1021 91 2 0 0
OW 0 1085 287 834 219 5 0 0
VODI 0 1312 411 1737 1597 586 7 0
ODI 0 1054 433 1693 3910 3294 315 0
CDI 0 134 55 269 2554 11221 7287 0
VCDI 0 0 1 10 818 4962 24679 15383

Date: 2025-06-19:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80459 20327 715 806 82 1 0 0
OW 1 1290 324 782 318 14 0 0
VODI 0 1314 402 1567 2063 693 11 0
ODI 0 1059 370 1386 3324 2628 374 0
CDI 0 127 96 366 1963 13810 7474 2
VCDI 0 2 6 23 1099 4845 27856 9050

Date: 2025-06-21:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80503 21509 875 958 124 4 0 0
OW 0 1259 290 798 354 8 0 0
VODI 0 1233 361 1392 2785 479 26 0
ODI 0 1032 372 1496 3196 1749 259 0
CDI 0 116 81 342 3668 16681 5545 11
VCDI 0 0 1 6 704 4233 25976 8603

Date: 2025-06-23:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 81067 22517 847 867 139 4 0 0
OW 0 1273 335 1022 352 23 0 0
VODI 0 902 315 1244 2007 730 28 0
ODI 0 733 341 1473 3150 2680 268 0
CDI 0 69 66 336 4039 18626 4175 35
VCDI 0 0 0 6 512 6526 21293 9029

Date: 2025-06-25:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 83045 22096 821 913 103 5 0 0
OW 0 1232 330 1100 272 25 0 0
VODI 0 730 271 1341 1794 312 32 0
ODI 0 572 270 1439 3928 2300 403 0
CDI 0 82 66 280 4362 20247 5478 23
VCDI 0 0 0 2 2351 7515 20848 2441

Date: 2025-06-27:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 84736 22361 723 888 110 1 0 0
OW 0 1273 417 1029 218 18 1 0
VODI 0 647 271 2263 2039 259 38 0
ODI 0 560 279 1280 2851 2167 445 0
CDI 0 54 55 271 4198 23688 5536 42
VCDI 0 0 0 7 171 8114 16904 3115


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