Validation of sea ice concentration

Bulletin date: 2024-06-13

Model vs. observations, sea ice class contingency tables

Date: 2024-06-07:

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 66433 20096 1626 328 96 46 73 0
OW 0 926 2082 1065 274 157 229 0
VODI 0 45 1014 1931 1564 717 698 21
ODI 0 22 141 990 1351 2358 1780 72
CDI 0 41 95 567 789 2675 8980 158
VCDI 0 0 20 272 163 860 18546 19167
...date precedes bulletin

Date: 2024-06-11:

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 66537 20050 2302 494 40 17 53 0
OW 3 786 1724 4066 724 140 248 14
VODI 2 118 396 2345 2119 948 928 42
ODI 1 62 82 850 1058 2068 1876 47
CDI 2 56 28 592 730 2736 11230 90
VCDI 0 0 0 72 48 288 13437 19019
...date precedes bulletin

Date: 2024-06-13:

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 66147 20096 2412 338 102 31 37 0
OW 0 649 2928 2672 969 291 215 9
VODI 0 67 548 1619 2369 1262 1007 23
ODI 0 29 117 573 888 2290 2899 47
CDI 0 0 56 667 643 2437 15123 586
VCDI 0 0 0 56 55 126 11069 17016
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 66147 20086 2426 394 143 41 47 0
OW 0 660 2876 2688 1080 301 245 4
VODI 0 62 566 1564 2188 1239 1015 26
ODI 0 33 136 577 922 2222 2997 49
CDI 0 0 57 616 621 2494 14727 549
VCDI 0 0 0 86 72 140 11319 17053

Date: 2024-06-17:

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 65939 19915 5149 888 174 81 87 0
OW 0 263 3433 2532 944 274 335 0
VODI 0 3 611 1349 1855 1356 1013 7
ODI 0 2 44 620 1097 2802 2975 35
CDI 0 0 9 306 534 1591 11937 177
VCDI 0 0 0 37 63 67 12964 17000
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 65939 19645 3860 735 160 91 106 0
OW 0 471 4029 1992 750 242 318 0
VODI 0 57 1024 1884 1825 892 1003 7
ODI 0 10 231 595 1120 2059 2816 48
CDI 0 0 102 458 702 2738 14090 340
VCDI 0 0 0 68 110 149 10978 16824

Date: 2024-06-19:

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 65442 20452 6598 760 236 79 125 0
OW 0 148 3216 2163 912 190 379 3
VODI 0 4 533 1153 1860 1199 901 34
ODI 0 0 128 420 870 2233 3508 96
CDI 0 0 162 367 385 1273 12653 699
VCDI 0 0 0 52 101 139 13688 15307
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 65442 20170 5029 529 158 75 137 0
OW 0 361 3862 1777 650 169 348 0
VODI 0 48 1100 1467 1666 976 1213 80
ODI 0 24 323 580 1131 1542 3458 149
CDI 0 1 323 512 674 2248 15069 1142
VCDI 0 0 0 50 85 103 11029 14768

Date: 2024-06-21:

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 68322 20054 6306 615 165 67 78 0
OW 0 215 2695 1799 709 318 282 5
VODI 0 14 527 1086 1654 930 888 52
ODI 0 3 166 473 819 1880 3264 110
CDI 0 0 109 549 671 1502 12386 1176
VCDI 0 0 0 83 101 260 14106 14029
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68322 19493 4553 429 127 68 89 0
OW 0 555 3551 1421 502 204 288 0
VODI 0 152 1064 1372 1310 918 1429 15
ODI 0 63 403 625 1058 1465 3702 113
CDI 0 23 226 583 985 2149 14379 2885
VCDI 0 0 6 175 137 153 11117 12359


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