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

Validation of sea ice concentration - Full domain

Bulletin date: 2023-04-27

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

Model vs. observations, sea ice class contingency tables

Date: 2023-04-21:

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 67654 16036 690 1267 356 34 21 0
OW 60 243 81 461 417 32 4 0
VODI 0 116 50 301 605 145 3 0
ODI 0 21 24 141 618 394 40 0
CDI 0 13 2 149 715 1189 701 31
VCDI 0 8 0 39 1121 6399 24166 62701
...date precedes bulletin

Date: 2023-04-23:

Best estimate Forecast
...observations not yet available ...observations not yet available

Date: 2023-04-25:

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 67393 16173 722 1449 507 102 16 0
OW 59 118 82 408 467 80 1 0
VODI 0 80 36 313 592 246 23 6
ODI 0 47 25 175 528 527 87 21
CDI 0 19 19 175 724 1617 955 52
VCDI 0 1 2 174 1399 7759 29154 54715
...date precedes bulletin

Date: 2023-04-27:

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 67235 16387 714 1492 467 130 7 0
OW 59 141 83 422 464 84 1 0
VODI 0 117 53 271 663 224 51 0
ODI 0 67 25 141 559 476 121 0
CDI 0 62 11 124 752 1702 958 7
VCDI 0 38 18 184 1359 7587 26261 57531
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67235 16415 733 1541 521 145 7 0
OW 59 137 73 382 429 67 10 0
VODI 0 108 44 286 634 239 47 0
ODI 0 59 26 126 574 482 128 1
CDI 0 68 11 120 803 1728 936 6
VCDI 0 25 17 179 1303 7542 26271 57531

Date: 2023-04-29:

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 67688 16310 744 1310 478 137 4 0
OW 74 198 71 474 401 132 1 0
VODI 0 136 67 276 543 255 61 0
ODI 0 68 22 139 416 479 135 0
CDI 0 75 9 134 735 1549 938 14
VCDI 0 34 17 151 1462 7257 27718 56336
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67688 16350 745 1372 516 152 4 0
OW 74 186 77 415 386 112 7 0
VODI 0 118 65 290 518 266 58 0
ODI 0 66 18 143 430 488 139 5
CDI 0 77 8 116 839 1647 938 21
VCDI 0 24 17 148 1346 7144 27711 56324

Date: 2023-05-01:

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 68304 16243 697 1040 305 89 0 0
OW 93 128 111 582 270 47 0 0
VODI 13 39 32 418 525 114 0 0
ODI 0 28 11 161 853 261 24 0
CDI 0 0 6 133 1378 3734 633 13
VCDI 0 0 0 34 876 5658 27047 57148
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68285 15981 673 1250 576 178 0 0
OW 95 194 84 379 341 143 22 0
VODI 13 111 45 281 455 322 74 0
ODI 15 58 19 136 423 465 188 1
CDI 2 47 16 133 746 1836 1180 29
VCDI 0 47 20 189 1666 6959 26240 57131

Date: 2023-05-03:

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 68143 16132 742 1356 456 65 0 0
OW 91 67 62 464 343 47 1 0
VODI 6 42 14 288 682 139 12 0
ODI 0 19 12 156 952 346 62 0
CDI 0 6 13 137 1553 3240 706 31
VCDI 0 0 0 115 956 7736 29429 52427
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68117 15893 663 1415 695 121 11 0
OW 82 174 78 355 389 142 32 0
VODI 15 82 65 213 647 343 79 0
ODI 20 31 14 163 666 436 152 0
CDI 6 43 2 195 1080 1845 685 22
VCDI 0 43 21 175 1465 8686 29251 52436

Date: 2023-05-05:

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 68339 15680 756 1574 438 72 0 0
OW 84 57 51 486 441 37 0 0
VODI 0 29 11 288 763 192 15 0
ODI 0 17 2 188 859 519 77 0
CDI 0 9 12 124 1411 3740 1103 4
VCDI 0 0 2 115 839 7568 30001 51145
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68291 15534 690 1521 699 130 14 0
OW 93 120 88 386 460 145 45 0
VODI 15 52 32 374 673 403 115 0
ODI 23 10 4 181 612 448 213 10
CDI 1 29 1 122 1016 2187 938 130
VCDI 0 47 19 191 1291 8815 29871 51009


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