Validation of sea ice concentration

Bulletin date: 2024-12-12

Model vs. observations, sea ice class contingency tables

Date: 2024-12-06:

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 72818 23992 2512 172 36 9 1 0
OW 0 1473 1802 441 112 108 10 0
VODI 0 474 1444 847 404 353 205 0
ODI 0 50 438 683 599 685 1166 0
CDI 0 28 207 309 343 1011 5595 10
VCDI 0 1 50 144 215 717 19154 20226
...date precedes bulletin

Date: 2024-12-10:

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 70635 26171 2534 312 25 2 1 0
OW 0 1035 1879 987 275 25 11 0
VODI 0 87 707 1096 923 339 75 0
ODI 0 1 126 616 592 986 437 0
CDI 0 1 43 160 507 2225 2181 3
VCDI 0 0 21 88 171 1574 23193 18800
...date precedes bulletin

Date: 2024-12-12:

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 70706 24775 2517 325 28 4 4 0
OW 0 1048 1581 916 297 131 25 0
VODI 0 162 585 863 750 648 130 0
ODI 0 40 172 315 541 747 785 0
CDI 0 40 126 190 421 1187 3102 1
VCDI 0 0 16 19 137 996 24808 19706
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 70706 25009 2885 435 71 17 10 0
OW 0 853 1468 879 312 191 22 0
VODI 0 113 410 907 752 701 242 0
ODI 0 38 115 281 514 825 936 0
CDI 0 43 114 118 401 1216 3358 1
VCDI 0 9 5 8 124 763 24286 19706

Date: 2024-12-16:

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 67854 25781 2388 409 117 12 13 0
OW 0 1342 1813 524 119 67 35 0
VODI 0 39 863 816 533 379 142 0
ODI 0 1 245 301 462 728 638 36
CDI 0 4 100 188 325 1172 4423 210
VCDI 0 0 27 42 110 803 23214 22569
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67854 25036 2496 514 166 79 66 0
OW 0 1456 1128 493 163 232 214 0
VODI 0 583 1013 501 372 519 820 0
ODI 0 86 511 351 333 553 1220 40
CDI 0 5 259 371 481 874 4628 225
VCDI 0 1 29 50 151 904 21517 22550

Date: 2024-12-18:

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 65567 25497 3648 435 83 58 2 0
OW 0 518 1735 895 308 95 27 0
VODI 0 50 578 929 739 318 200 0
ODI 0 11 194 435 652 594 655 7
CDI 0 3 122 334 548 1292 6100 26
VCDI 0 0 7 120 394 877 25695 19096
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 65567 24910 3267 672 139 102 40 0
OW 0 903 1496 601 319 229 71 0
VODI 0 216 925 921 646 514 568 0
ODI 0 38 373 480 635 553 1392 0
CDI 0 11 212 375 676 940 4757 16
VCDI 0 1 11 99 309 896 25851 19113

Date: 2024-12-20:

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 64240 24962 2891 856 189 45 3 0
OW 0 621 1178 918 637 249 20 0
VODI 0 162 440 926 961 567 184 0
ODI 0 35 190 477 774 818 841 0
CDI 0 13 130 482 937 1935 7324 11
VCDI 0 0 8 62 248 683 25087 18740
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 64240 24578 2731 1136 606 167 16 0
OW 0 973 891 591 440 214 88 0
VODI 0 221 897 882 956 596 442 0
ODI 0 10 237 548 811 851 1601 0
CDI 0 11 79 445 716 1663 5331 53
VCDI 0 0 2 119 217 806 25981 18698


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