Validation of sea ice concentration

Bulletin date: 2024-01-18

Model vs. observations, sea ice class contingency tables

Date: 2024-01-12:

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 54378 21951 1652 419 196 64 0 0
OW 0 829 1587 796 363 168 3 0
VODI 0 242 1062 931 794 624 125 0
ODI 0 82 403 474 617 1047 995 1
CDI 0 55 298 363 533 1245 5145 35
VCDI 0 6 65 73 123 425 27447 32852
...date precedes bulletin

Date: 2024-01-16:

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 53473 21046 1999 90 52 9 0 0
OW 0 483 2315 1215 126 115 0 0
VODI 0 12 966 1461 1020 562 93 0
ODI 0 0 187 486 930 1051 435 0
CDI 0 0 70 312 800 1879 2970 17
VCDI 0 0 10 181 358 1324 33632 28789
...date precedes bulletin

Date: 2024-01-18:

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 54442 20778 970 116 19 0 0 0
OW 0 1375 1679 801 134 27 0 0
VODI 0 260 1197 1402 563 401 16 0
ODI 0 71 409 921 662 845 222 1
CDI 0 4 157 670 778 1436 2464 188
VCDI 0 0 2 186 487 1214 36678 26893
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 54442 20840 999 121 33 0 0 0
OW 0 1319 1642 754 138 34 0 0
VODI 0 250 1204 1456 579 387 22 0
ODI 0 74 411 919 630 896 223 1
CDI 0 5 156 667 843 1492 2613 196
VCDI 0 0 2 179 420 1114 36522 26885

Date: 2024-01-22:

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 56332 20611 1463 142 5 1 1 0
OW 0 1158 1748 794 157 17 31 0
VODI 0 195 641 1022 527 312 108 0
ODI 0 40 212 891 550 510 195 0
CDI 0 73 227 692 887 2256 2032 60
VCDI 0 0 34 169 389 4306 32418 27262
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 56332 19710 1021 225 39 1 0 0
OW 0 1307 1298 503 151 113 23 0
VODI 0 533 855 682 386 259 99 0
ODI 0 252 479 750 490 405 237 1
CDI 0 165 415 1171 953 2380 2274 58
VCDI 0 110 257 379 496 4244 32152 27263

Date: 2024-01-24:

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 57675 19838 1296 97 26 0 0 0
OW 0 1200 1325 464 98 9 1 0
VODI 0 400 839 1087 515 253 38 0
ODI 0 174 427 1064 680 466 178 11
CDI 0 153 377 818 752 1295 3192 94
VCDI 0 152 376 479 605 3180 35957 22877
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57675 18452 1040 154 38 15 0 0
OW 0 1589 1027 333 96 82 0 0
VODI 0 808 871 766 302 201 13 0
ODI 0 462 517 841 692 490 146 0
CDI 0 324 717 1414 971 1529 3075 43
VCDI 0 282 468 501 577 2886 36132 22939

Date: 2024-01-26:

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 58361 19373 1043 96 1 1 0 0
OW 0 1259 1152 305 45 10 11 0
VODI 0 658 1286 1118 461 121 88 0
ODI 0 323 523 1171 527 354 308 0
CDI 0 370 677 1129 806 1232 2916 70
VCDI 0 395 780 1184 740 2918 38596 18060
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58361 18031 1190 209 48 1 0 0
OW 0 1566 818 355 132 47 6 0
VODI 0 1046 885 694 320 194 34 0
ODI 0 617 763 924 432 326 205 23
CDI 0 655 1067 1581 841 1068 2945 96
VCDI 0 463 738 1240 807 3000 38729 18011


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