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: 2025-06-26

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

Model vs. observations, sea ice class contingency tables

Date: 2025-06-20:

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 72654 9673 57 21 0 0 0 0
OW 52 1905 387 347 12 0 0 0
VODI 0 342 297 1695 304 3 0 0
ODI 0 0 8 408 940 120 0 1
CDI 0 0 0 73 787 1340 329 41
VCDI 0 0 0 3 59 574 4065 3919
...date precedes bulletin

Date: 2025-06-22:

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 73405 8699 52 21 0 0 0 0
OW 180 2144 315 340 7 0 0 0
VODI 0 460 295 1489 294 1 0 0
ODI 0 2 21 418 980 71 9 0
CDI 0 0 0 123 903 1427 370 1
VCDI 0 0 0 4 78 1174 4289 2844
...date precedes bulletin

Date: 2025-06-24:

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 73685 9431 54 34 0 0 0 0
OW 77 1962 528 389 4 0 0 0
VODI 0 16 91 1586 311 1 0 1
ODI 0 0 0 196 1357 64 1 0
CDI 0 0 0 74 622 1531 285 7
VCDI 0 0 0 1 17 423 3691 3977
...date precedes bulletin

Date: 2025-06-26:

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 74404 9027 56 34 0 0 0 0
OW 81 2073 370 332 14 2 0 0
VODI 0 113 198 1270 329 8 0 0
ODI 0 0 7 297 1075 62 14 0
CDI 0 0 0 175 974 1619 241 0
VCDI 0 0 0 0 18 2136 3852 1635
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 74419 9125 63 47 0 0 0 0
OW 66 1958 343 300 16 1 0 0
VODI 0 130 220 1298 363 9 0 0
ODI 0 0 5 288 1074 73 20 0
CDI 0 0 0 174 924 1637 429 0
VCDI 0 0 0 1 33 2107 3658 1635

Date: 2025-06-28:

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 75680 8426 52 13 0 0 0 0
OW 122 1941 295 256 9 0 0 0
VODI 0 239 200 987 185 2 1 0
ODI 0 4 25 424 990 30 13 5
CDI 0 0 0 267 1368 952 308 8
VCDI 0 0 0 0 56 1915 4034 1609
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 75682 8446 64 22 0 0 0 0
OW 120 1893 277 240 8 0 0 0
VODI 0 271 210 1024 200 2 1 0
ODI 0 0 21 381 1007 42 25 6
CDI 0 0 0 280 1210 1041 477 5
VCDI 0 0 0 0 183 1814 3853 1611

Date: 2025-06-30:

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 76521 9041 41 34 0 0 0 0
OW 178 1232 454 503 6 0 0 0
VODI 0 1 41 1033 217 3 1 0
ODI 0 0 0 155 1304 19 0 1
CDI 0 0 0 10 853 1855 8 15
VCDI 0 0 0 0 0 550 3527 2813
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 76343 8354 26 32 0 0 0 0
OW 334 1509 236 221 7 3 0 0
VODI 22 370 205 797 234 1 1 0
ODI 0 41 60 351 920 91 4 9
CDI 0 0 9 329 1145 1283 371 14
VCDI 0 0 0 5 74 1049 3160 2806

Date: 2025-07-02:

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 76969 8943 60 22 0 0 0 0
OW 145 1190 364 380 5 0 0 0
VODI 0 28 97 955 289 1 1 0
ODI 0 0 0 307 1185 30 8 0
CDI 0 0 0 44 1533 1054 75 0
VCDI 0 0 0 0 185 1690 4143 713
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 76818 8132 40 21 0 0 0 0
OW 295 1489 179 197 19 1 0 0
VODI 1 464 238 677 241 0 5 0
ODI 0 71 43 430 901 179 10 0
CDI 0 5 21 365 1624 961 325 0
VCDI 0 0 0 18 412 1634 3887 713

Date: 2025-07-04:

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 80919 4937 191 12 0 0 0 0
OW 506 710 361 266 3 0 0 0
VODI 21 92 673 649 140 0 1 1
ODI 0 14 672 400 906 42 5 12
CDI 0 0 763 171 1113 346 75 17
VCDI 0 0 0 99 1098 2781 2116 304
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80411 4602 212 22 0 0 0 0
OW 813 826 322 160 3 0 0 0
VODI 187 245 526 575 138 0 1 2
ODI 35 66 582 344 691 86 0 7
CDI 0 14 914 353 1500 589 250 13
VCDI 0 0 104 143 928 2494 1946 312


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