Validation of sea ice concentration

Bulletin date: 2024-01-25

Model vs. observations, sea ice class contingency tables

Date: 2024-01-19:

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 54274 20796 1055 164 19 0 0 0
OW 0 1388 1556 760 127 43 1 0
VODI 0 333 1224 1501 445 269 41 0
ODI 0 106 481 1148 577 397 415 5
CDI 0 60 288 792 733 1075 2874 144
VCDI 0 2 71 306 544 1556 40218 22680
...date precedes bulletin

Date: 2024-01-23:

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 56686 20619 1465 83 12 0 0 0
OW 0 908 1811 485 153 9 3 0
VODI 0 175 816 880 534 321 23 0
ODI 0 58 404 822 682 632 149 0
CDI 0 24 421 620 875 2326 2348 10
VCDI 0 37 318 421 439 3194 31501 28204
...date precedes bulletin

Date: 2024-01-25:

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 57128 20510 1128 86 13 12 1 0
OW 0 1066 1235 484 79 13 16 0
VODI 0 451 1036 1315 530 131 96 0
ODI 0 206 452 1147 578 317 246 7
CDI 0 219 653 976 815 1396 3064 143
VCDI 0 200 384 851 650 2642 37516 20676
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57128 20665 1238 90 9 7 0 0
OW 0 940 1174 513 69 19 14 0
VODI 0 435 968 1277 519 132 89 0
ODI 0 201 477 1101 593 292 235 7
CDI 0 214 659 1045 838 1403 3106 143
VCDI 0 197 372 833 637 2658 37495 20676

Date: 2024-01-29:

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 59769 19883 1208 229 25 2 4 0
OW 0 1582 2180 1312 184 52 21 0
VODI 0 281 667 1467 634 168 105 5
ODI 0 183 229 649 656 407 276 42
CDI 0 323 838 1127 757 1278 1530 178
VCDI 0 21 286 1130 930 2447 32421 22982
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 59769 19465 931 173 17 2 0 0
OW 0 1178 1179 440 54 18 8 0
VODI 0 566 1111 1335 382 128 78 8
ODI 0 254 576 1032 576 219 228 45
CDI 0 472 647 1021 914 1018 985 198
VCDI 0 338 964 1913 1243 2969 33058 22956

Date: 2024-01-31:

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 59881 20278 1679 148 15 7 4 0
OW 0 1925 1660 626 166 78 32 0
VODI 0 604 1138 1009 470 221 200 0
ODI 0 304 283 602 522 422 412 4
CDI 0 506 826 1088 772 1146 2354 49
VCDI 0 333 1075 1687 1159 2469 34621 17693
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 59865 18871 1338 159 54 22 4 0
OW 16 1444 884 266 60 74 20 0
VODI 0 991 1151 667 296 130 107 0
ODI 0 652 823 730 361 210 350 16
CDI 0 1368 989 1260 969 1153 2287 54
VCDI 0 624 1476 2078 1364 2754 34855 17676

Date: 2024-02-02:

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 54856 23187 2044 735 283 2 1 0
OW 7 1440 1332 1138 461 59 34 0
VODI 0 648 1273 1136 581 377 187 0
ODI 0 304 362 723 526 590 445 0
CDI 0 636 525 1205 1063 1634 3656 37
VCDI 0 945 1225 1814 944 2761 32768 16524
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 54788 21150 1759 1185 661 216 12 0
OW 52 1494 692 316 183 169 44 0
VODI 23 1095 1067 649 326 287 124 0
ODI 0 583 915 746 355 348 292 0
CDI 0 1344 715 1083 720 1169 2038 0
VCDI 0 1494 1613 2772 1613 3234 34581 16561


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