Description of algorithm
Full domain
American sector
  Ice concntr, edge pos
  Contingency tables
European sector
Asian sector

Validation of sea ice concentration - American sector

Bulletin date: 2024-07-25

Data source: OSI SAF N.H. AMSR sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2024-07-19:

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 5420 6420 83 46 2 0 0 0
OW 3 1537 264 350 76 7 0 0
VODI 3 554 384 1912 1033 96 0 0
ODI 1 22 47 789 3411 210 0 0
CDI 4 123 21 64 6689 13499 325 0
VCDI 0 7 8 43 801 1439 173 0
...date precedes bulletin

Date: 2024-07-21:

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 5662 6412 43 18 2 0 0 0
OW 2 1581 291 391 112 6 0 0
VODI 2 705 367 2399 826 44 0 0
ODI 1 42 70 618 2987 96 0 0
CDI 3 134 18 80 6323 13015 310 0
VCDI 0 44 13 50 869 2271 59 0
...date precedes bulletin

Date: 2024-07-23:

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 5871 6953 92 56 8 0 0 0
OW 2 1243 406 472 57 5 0 0
VODI 2 316 390 2232 1096 55 0 0
ODI 0 63 14 508 6098 546 0 0
CDI 0 134 15 53 4964 10258 958 0
VCDI 0 2 2 25 636 1179 1155 0
...date precedes bulletin

Date: 2024-07-25:

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 6212 6823 80 43 8 0 0 0
OW 4 1513 385 433 78 17 0 0
VODI 0 478 531 2651 574 53 0 0
ODI 0 72 21 719 5474 1410 13 0
CDI 0 124 10 74 2547 9632 2097 0
VCDI 0 9 5 74 745 1993 964 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 6212 6852 94 55 5 0 0 0
OW 4 1419 365 467 69 12 0 0
VODI 0 524 538 2468 596 81 0 0
ODI 0 67 20 853 5495 1410 20 0
CDI 0 150 10 76 2509 8926 1998 0
VCDI 0 7 5 75 752 2676 1056 0

Date: 2024-07-27:

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 6547 6654 79 74 13 0 0 0
OW 2 1793 413 571 131 14 0 0
VODI 2 517 461 2120 880 160 4 0
ODI 0 79 34 703 4373 1898 70 0
CDI 0 122 29 93 2427 10790 2172 0
VCDI 0 19 17 123 526 1107 849 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 6548 6697 92 86 12 0 0 0
OW 1 1708 390 509 132 13 0 0
VODI 2 537 470 2102 787 160 4 0
ODI 0 79 37 779 4495 1976 151 0
CDI 0 136 28 87 2398 10621 2156 0
VCDI 0 27 16 121 526 1199 784 0

Date: 2024-07-29:

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 6355 8001 103 93 16 0 0 0
OW 2 1766 550 542 91 0 0 0
VODI 5 227 384 2336 676 41 0 0
ODI 0 88 19 332 5555 884 2 0
CDI 0 52 23 76 735 11737 1314 1
VCDI 0 7 17 114 349 817 2551 5
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 6354 7182 79 99 23 0 0 0
OW 2 1971 368 530 129 7 0 0
VODI 0 673 549 1876 682 167 0 0
ODI 6 112 43 755 4060 1921 53 1
CDI 0 145 27 81 2119 10353 3257 5
VCDI 0 58 30 152 409 1031 557 0

Date: 2024-07-31:

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 7151 7599 121 82 6 0 0 0
OW 17 1907 485 486 67 11 0 0
VODI 15 279 442 2140 887 39 0 0
ODI 8 86 21 236 4155 1414 0 0
CDI 0 80 35 84 1852 10351 2587 0
VCDI 0 40 28 207 247 1697 1004 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 7148 6674 101 75 9 0 0 0
OW 6 2113 396 563 102 18 0 0
VODI 7 836 507 1683 771 135 0 0
ODI 22 102 46 581 3393 2181 20 0
CDI 8 171 34 100 2657 10014 3321 0
VCDI 0 95 48 233 282 1164 250 0

Date: 2024-08-02:

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 8606 6512 93 37 2 0 0 0
OW 67 2284 433 419 42 0 0 0
VODI 46 637 441 2083 488 54 1 0
ODI 18 99 29 509 3926 687 143 0
CDI 0 126 31 100 2773 9746 2342 0
VCDI 0 131 45 152 276 1137 1351 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 8450 5653 98 54 2 0 0 0
OW 218 2377 355 446 67 8 1 0
VODI 30 1221 487 1502 420 148 74 0
ODI 27 136 45 1006 3174 1909 91 0
CDI 12 210 38 139 3589 8869 3237 0
VCDI 0 192 49 153 255 690 434 0


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