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: 2025-05-22

Model: GLO MFC - NEMO

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

Model vs. observations, sea ice class contingency tables

Date: 2025-05-16:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71282 13323 432 589 10 0 0 0
OW 0 298 81 440 34 0 0 0
VODI 0 455 230 1937 738 22 0 0
ODI 0 178 102 963 3123 852 5 0
CDI 0 1 0 117 1002 3867 1071 2
VCDI 0 0 0 0 1 634 6677 625

Date: 2025-05-18:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71387 13524 489 702 19 0 0 0
OW 0 240 85 663 88 0 0 0
VODI 0 391 168 1892 683 30 0 0
ODI 0 251 106 750 3559 707 10 0
CDI 0 0 1 85 935 3456 999 10
VCDI 0 0 0 0 0 340 5515 2006

Date: 2025-05-20:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71437 13728 487 957 198 0 0 0
OW 0 238 100 694 111 0 0 0
VODI 0 219 162 1572 719 24 9 0
ODI 0 221 105 616 3314 968 63 0
CDI 0 1 0 84 644 3598 1198 30
VCDI 0 0 0 0 0 552 4556 2486

Date: 2025-05-22:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 71812 13521 495 1124 52 0 0 0
OW 0 182 97 745 152 0 0 0
VODI 0 237 141 1473 735 36 4 0
ODI 0 154 105 653 3518 835 56 0
CDI 0 0 0 76 753 3983 859 6
VCDI 0 0 0 0 5 468 5032 1782

Date: 2025-05-24:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 72705 13251 519 793 39 0 0 0
OW 0 147 148 584 134 3 0 0
VODI 0 268 146 1504 706 25 6 0
ODI 0 226 101 703 3649 623 38 0
CDI 0 3 4 41 868 4098 726 6
VCDI 0 0 0 0 2 237 2951 3837

Date: 2025-05-26:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 74818 12064 409 574 5 0 0 0
OW 0 182 147 516 13 0 0 0
VODI 0 228 151 1538 592 34 3 0
ODI 0 243 113 710 3355 930 60 0
CDI 0 1 2 25 667 3489 1134 0
VCDI 0 0 0 0 0 215 4820 2053

Date: 2025-05-28:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 75054 12087 405 735 34 0 0 0
OW 0 171 111 434 57 0 0 0
VODI 0 269 170 1312 590 26 0 0
ODI 0 238 119 848 3255 1079 48 0
CDI 0 0 2 18 528 3328 1462 5
VCDI 0 0 0 0 1 123 4288 2294

Date: 2025-05-30:

Best estimate
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 75393 12079 433 685 22 0 0 0
OW 0 159 135 467 32 0 0 0
VODI 0 270 155 1346 731 24 0 0
ODI 0 327 150 710 3168 1199 36 0
CDI 0 0 0 17 550 2376 2015 0
VCDI 0 0 0 0 0 37 3744 2831


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