Validation of sea ice concentration

Bulletin date: 2024-02-22

Model vs. observations, sea ice class contingency tables

Date: 2024-02-16:

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 55592 22692 1323 247 25 1 6 0
OW 2 1948 1524 735 170 46 15 0
VODI 0 706 1161 968 525 249 108 0
ODI 0 196 487 734 731 614 280 0
CDI 0 130 521 998 1216 1585 3149 19
VCDI 0 232 787 1140 1000 2337 33487 20782
...date precedes bulletin

Date: 2024-02-20:

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 51170 23703 2728 1028 34 7 0 0
OW 0 734 1786 1685 281 26 10 0
VODI 0 239 898 1538 1052 405 110 0
ODI 0 94 243 903 966 969 504 13
CDI 0 0 310 900 1461 2713 5063 60
VCDI 0 0 51 725 1209 4670 30430 19750
...date precedes bulletin

Date: 2024-02-22:

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 53897 22586 2381 278 63 2 0 0
OW 0 564 2134 805 430 91 4 0
VODI 0 131 1077 916 628 476 88 0
ODI 0 62 388 639 715 840 446 0
CDI 0 60 264 610 879 2661 5889 13
VCDI 0 40 209 296 862 2806 30691 23547
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 53897 22514 2422 296 57 1 1 0
OW 0 630 2059 802 428 97 4 0
VODI 0 135 1079 932 679 477 103 0
ODI 0 65 382 617 665 792 472 0
CDI 0 62 290 596 911 2701 5890 12
VCDI 0 37 221 301 837 2808 30648 23548

Date: 2024-02-26:

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 55897 22081 2486 275 84 19 16 0
OW 4 785 2710 881 295 142 56 0
VODI 0 141 1127 911 683 459 274 0
ODI 0 88 478 477 746 585 636 0
CDI 0 139 705 786 888 2080 5659 13
VCDI 0 1 290 890 475 1346 29694 23166
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 55901 21602 1850 197 73 16 6 0
OW 0 915 1874 528 236 85 41 0
VODI 0 270 1528 701 393 293 239 0
ODI 0 137 894 702 533 411 697 0
CDI 0 174 868 872 1218 1917 6053 51
VCDI 0 137 782 1220 718 1909 29299 23128

Date: 2024-02-28:

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 57589 21693 1789 178 27 6 7 0
OW 8 1058 2047 892 130 65 41 0
VODI 0 222 1141 1183 416 174 205 0
ODI 0 123 487 832 539 474 383 4
CDI 0 143 564 1175 696 1422 4887 16
VCDI 0 19 514 1033 682 1314 34760 19530
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57538 20683 989 195 28 7 8 0
OW 59 1353 1466 469 128 30 44 0
VODI 0 581 1503 721 341 171 184 0
ODI 0 229 923 954 370 197 510 4
CDI 0 360 856 1600 802 1322 4905 49
VCDI 0 52 805 1354 821 1728 34632 19497

Date: 2024-03-01:

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 58840 21621 862 292 3 3 6 0
OW 0 1798 1199 729 84 25 54 0
VODI 0 642 1257 1080 287 87 131 0
ODI 0 281 733 930 524 197 254 0
CDI 0 271 982 1288 1081 1387 3606 0
VCDI 0 86 623 1213 881 1959 36678 16494
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58840 19734 393 237 21 11 0 0
OW 0 2380 630 444 51 42 37 0
VODI 0 1186 1241 815 235 107 232 0
ODI 0 551 1076 964 378 150 422 0
CDI 0 519 1342 1487 989 867 3851 1
VCDI 0 329 974 1585 1186 2481 36187 16493


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