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

Validation of sea ice concentration - European sector

Bulletin date: 2025-05-29

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-05-23:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 63720 11599 125 103 7 0 0 0
OW 1 1697 593 1226 65 0 0 0
VODI 0 79 146 2350 800 11 0 0
ODI 0 0 5 300 2976 334 4 0
CDI 0 0 0 46 1404 4071 416 1
VCDI 0 0 0 17 44 1262 3408 3606
...date precedes bulletin

Date: 2025-05-25:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 65630 10099 71 32 0 0 0 0
OW 70 2003 522 1016 35 2 0 0
VODI 0 116 170 2122 784 28 0 0
ODI 0 0 4 397 2846 331 14 0
CDI 0 0 0 78 1521 3337 591 7
VCDI 0 0 0 13 91 1254 5070 2162
...date precedes bulletin

Date: 2025-05-27:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 66259 11074 86 54 3 0 0 0
OW 0 1302 579 850 61 3 0 0
VODI 0 36 93 2061 714 25 0 0
ODI 0 0 0 307 3056 164 2 0
CDI 0 0 0 14 965 3766 435 1
VCDI 0 0 0 4 27 533 5291 2651
...date precedes bulletin

Date: 2025-05-29:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 66517 11049 85 69 0 0 0 0
OW 1 1376 611 799 80 1 0 0
VODI 0 33 119 2096 589 36 0 0
ODI 0 1 5 371 2631 235 0 0
CDI 0 0 1 29 1416 2896 1312 155
VCDI 0 0 0 9 6 768 3304 3816
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 66516 11048 93 76 0 0 0 0
OW 2 1359 580 802 79 4 0 0
VODI 0 51 142 2099 655 39 0 0
ODI 0 1 5 362 2538 271 0 0
CDI 0 0 1 20 1418 2747 1371 184
VCDI 0 0 0 14 32 875 3245 3787

Date: 2025-05-31:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67044 10702 66 34 0 0 0 0
OW 35 1652 580 755 69 0 0 0
VODI 0 154 252 1889 686 2 0 0
ODI 0 2 14 475 2199 182 0 0
CDI 0 0 0 96 1678 2706 1533 9
VCDI 0 0 0 4 15 954 3989 2640
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67042 10695 76 36 0 0 0 0
OW 37 1635 544 747 91 0 0 0
VODI 0 176 285 1878 731 2 0 0
ODI 0 4 7 491 2119 226 0 0
CDI 0 0 0 91 1637 2528 1538 6
VCDI 0 0 0 10 69 1088 3984 2643

Date: 2025-06-02:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67568 10233 87 46 0 0 0 0
OW 16 1742 496 911 76 0 0 0
VODI 0 284 275 1764 716 3 0 0
ODI 0 3 36 636 1963 296 0 0
CDI 0 0 0 146 1790 3134 1505 0
VCDI 0 0 0 8 48 1095 4524 1015
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67573 9925 59 30 0 0 0 0
OW 11 2015 487 873 94 0 0 0
VODI 0 320 312 1829 702 1 0 0
ODI 0 2 36 627 1913 306 0 0
CDI 0 0 0 143 1758 2709 1338 3
VCDI 0 0 0 9 126 1512 4691 1012

Date: 2025-06-04:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67567 11395 124 52 0 0 0 0
OW 0 1315 658 938 43 0 0 0
VODI 0 71 112 2030 583 15 0 0
ODI 0 0 0 283 2398 118 0 0
CDI 0 0 0 33 1455 4273 1175 2
VCDI 0 0 0 0 0 596 4382 798
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67558 10291 97 60 0 0 0 0
OW 9 2031 517 977 102 16 0 0
VODI 0 446 227 1474 755 7 0 0
ODI 0 13 50 653 1713 172 0 0
CDI 0 0 3 159 1715 3515 1887 64
VCDI 0 0 0 13 194 1292 3670 736

Date: 2025-06-06:

Best estimate Forecast
...observations not yet available ...observations not yet available


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