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

Validation of sea ice concentration - Asian 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 14 643 26 35 0 0 0 0
OW 0 63 18 57 0 0 0 0
VODI 0 235 70 291 57 5 9 0
ODI 0 291 179 912 1087 149 52 6
CDI 0 2 4 68 760 3310 833 69
VCDI 0 0 0 0 7 784 13083 8963

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 4 608 28 77 0 0 0 0
OW 0 66 15 46 2 0 0 0
VODI 0 259 84 368 56 1 1 0
ODI 0 277 156 877 1154 174 47 3
CDI 0 2 1 78 717 3689 893 82
VCDI 0 0 0 0 1 732 11677 9907

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 8 632 23 52 1 0 0 0
OW 0 91 23 38 2 0 0 0
VODI 0 344 158 448 59 2 4 0
ODI 0 336 141 827 1168 227 69 21
CDI 0 0 1 60 823 4116 899 91
VCDI 0 0 0 0 2 1867 10829 8720

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 24 591 38 63 1 0 0 0
OW 0 112 30 44 1 0 0 0
VODI 0 345 158 533 79 5 5 0
ODI 0 344 112 742 1377 323 73 18
CDI 0 0 0 57 789 3974 1603 268
VCDI 0 0 0 0 4 1895 10927 7547

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 0 628 31 67 1 0 0 0
OW 0 123 32 53 3 0 0 0
VODI 0 377 195 513 62 1 0 0
ODI 0 286 110 716 1705 321 15 0
CDI 0 0 0 37 856 4776 1755 105
VCDI 0 0 0 0 4 1820 10219 7271

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 0 647 45 50 0 0 0 0
OW 0 119 42 56 1 0 0 0
VODI 0 347 142 559 99 19 0 0
ODI 0 209 83 576 1934 559 33 0
CDI 0 0 0 20 684 5165 1869 75
VCDI 0 0 0 0 12 1438 9254 8045

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 1 890 66 112 0 0 0 0
OW 0 115 25 92 0 0 0 0
VODI 0 338 132 473 86 0 0 0
ODI 0 265 120 634 1949 304 33 0
CDI 0 0 0 54 763 5287 1405 1
VCDI 0 0 0 0 48 1012 8688 9189

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 1 1072 87 122 0 0 0 0
OW 0 135 20 41 2 0 0 0
VODI 0 384 143 456 76 0 6 0
ODI 0 369 123 710 1803 343 60 0
CDI 0 0 0 65 1032 4985 1284 3
VCDI 0 0 0 0 13 993 8110 9644


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