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

Validation of sea ice concentration - American sector

Bulletin date: 2023-10-26

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2023-10-20:

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 29485 6031 349 623 134 0 0 0
OW 1 285 95 472 388 9 0 0
VODI 0 49 28 291 614 71 0 0
ODI 0 0 6 76 429 328 0 0
CDI 0 0 0 54 227 1870 660 0
VCDI 0 0 0 4 122 1624 7196 9710
...date precedes bulletin

Date: 2023-10-22:

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 28603 6084 254 409 57 0 0 0
OW 2 333 183 728 264 18 0 0
VODI 0 50 33 423 624 80 0 0
ODI 0 12 10 100 553 162 2 0
CDI 0 9 10 43 319 987 174 0
VCDI 0 0 2 34 151 3391 7830 9297
...date precedes bulletin

Date: 2023-10-24:

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 29134 5672 185 129 12 0 0 0
OW 0 419 242 500 43 0 0 0
VODI 0 43 79 795 384 21 0 0
ODI 0 3 3 213 785 124 0 0
CDI 0 1 1 36 643 731 4 0
VCDI 0 0 0 15 207 3318 8141 9348
...date precedes bulletin

Date: 2023-10-26:

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 28696 5357 136 167 34 2 0 0
OW 1 461 236 568 140 13 0 0
VODI 0 103 95 713 316 121 0 0
ODI 0 5 12 240 431 392 0 0
CDI 0 1 1 36 580 912 94 0
VCDI 0 0 0 6 405 4031 7788 9138
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 28692 5316 174 233 30 1 0 0
OW 1 503 198 488 134 9 0 0
VODI 4 101 96 757 338 100 0 0
ODI 0 6 11 212 499 306 0 0
CDI 0 1 1 37 534 917 34 0
VCDI 0 0 0 3 371 4138 7848 9138

Date: 2023-10-28:

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 27345 5615 211 365 7 0 0 0
OW 0 398 193 682 193 31 0 0
VODI 0 52 67 610 583 106 0 0
ODI 0 5 5 163 633 330 2 0
CDI 0 0 0 35 462 1091 21 0
VCDI 0 0 0 0 86 4516 7800 9624
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 27342 5586 245 465 17 0 0 0
OW 0 403 165 581 236 25 0 0
VODI 3 76 60 612 577 90 0 0
ODI 0 3 5 172 573 284 2 0
CDI 0 2 1 25 501 1157 48 0
VCDI 0 0 0 0 60 4518 7773 9624

Date: 2023-10-30:

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 26194 5568 285 324 15 0 0 0
OW 0 211 195 697 133 0 0 0
VODI 0 0 19 789 564 16 0 0
ODI 0 0 0 68 1181 246 0 0
CDI 0 0 0 3 544 1372 42 0
VCDI 0 0 0 0 2 2723 9117 10923
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 26187 5432 302 612 154 0 0 0
OW 4 305 163 676 307 46 0 0
VODI 3 40 32 452 663 159 0 0
ODI 0 2 2 123 688 318 1 0
CDI 0 0 0 18 480 1037 122 0
VCDI 0 0 0 0 147 2797 9036 10923

Date: 2023-11-01:

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 25686 4702 351 465 82 0 0 0
OW 0 306 175 700 361 23 0 0
VODI 0 31 21 426 648 160 0 0
ODI 0 0 1 122 577 386 0 0
CDI 0 0 0 14 646 1038 35 0
VCDI 0 0 0 0 97 2005 6022 16151
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 25676 4567 360 551 94 0 0 0
OW 6 396 151 693 593 33 0 0
VODI 4 72 30 367 808 236 0 0
ODI 0 4 7 87 430 547 0 0
CDI 0 0 0 29 310 985 62 0
VCDI 0 0 0 0 176 1811 5995 16151

Date: 2023-11-03:

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 25392 4072 330 556 39 0 0 0
OW 1 401 153 516 398 24 0 0
VODI 0 48 44 473 674 265 0 0
ODI 0 2 3 168 666 280 4 0
CDI 0 0 0 53 545 540 41 0
VCDI 0 0 0 14 563 2146 7293 15527
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 25374 3788 363 755 248 9 0 0
OW 15 540 85 384 472 56 0 0
VODI 4 186 76 441 787 384 0 0
ODI 0 9 6 140 524 553 1 0
CDI 0 0 0 46 400 579 142 0
VCDI 0 0 0 14 454 1674 7195 15527


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