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: 2023-12-14

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

Model vs. observations, sea ice class contingency tables

Date: 2023-12-08:

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 80732 15161 839 1509 487 285 181 9
OW 152 1123 336 1049 461 60 12 13
VODI 16 474 139 792 791 232 4 7
ODI 3 101 40 425 548 579 6 4
CDI 0 9 8 156 715 1541 96 24
VCDI 0 7 13 73 509 3776 21555 51996
...date precedes bulletin

Date: 2023-12-10:

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 80206 13761 870 1437 578 337 173 5
OW 144 1055 262 1240 809 101 10 12
VODI 0 562 217 854 953 316 8 9
ODI 0 88 57 366 805 502 7 6
CDI 0 17 6 243 744 1325 144 8
VCDI 0 19 14 136 694 3925 19452 54571
...date precedes bulletin

Date: 2023-12-12:

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 78400 14829 1060 1650 449 248 144 0
OW 113 546 345 1213 362 47 10 0
VODI 7 265 161 1165 841 133 21 0
ODI 0 55 47 474 1115 463 20 0
CDI 0 13 19 259 1166 1615 138 20
VCDI 0 2 14 162 840 5402 19607 53608
...date precedes bulletin

Date: 2023-12-14:

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 78278 13892 771 1383 448 259 110 0
OW 58 666 337 1041 497 156 9 0
VODI 0 295 181 1070 779 294 14 0
ODI 0 76 50 684 1056 350 20 0
CDI 0 31 23 372 1151 881 94 8
VCDI 0 31 33 186 1351 7072 18835 54206
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 78271 13974 787 1450 530 305 109 0
OW 65 572 294 971 455 121 9 0
VODI 0 311 206 1080 755 307 15 0
ODI 0 66 50 696 1086 412 24 0
CDI 0 32 23 347 1111 781 105 9
VCDI 0 36 35 192 1345 7086 18820 54205

Date: 2023-12-16:

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 75736 15484 934 1109 694 201 180 0
OW 65 719 177 1025 717 154 21 0
VODI 0 428 202 802 884 476 38 0
ODI 0 96 104 453 796 452 65 0
CDI 0 32 42 350 1033 908 289 6
VCDI 0 38 37 321 1424 7793 18686 54077
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 75733 15516 971 1299 832 244 180 0
OW 67 707 139 880 573 145 32 0
VODI 1 415 216 773 895 464 46 0
ODI 0 80 85 456 798 497 114 0
CDI 0 36 42 319 1007 850 371 5
VCDI 0 43 43 333 1443 7784 18536 54078

Date: 2023-12-18:

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 78299 12407 568 970 511 583 221 0
OW 73 498 175 833 462 321 35 0
VODI 0 249 162 898 534 650 23 0
ODI 0 125 116 615 697 605 65 0
CDI 0 54 49 386 760 962 282 5
VCDI 0 47 50 366 1546 8416 18570 54860
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 78301 12436 566 953 612 565 223 0
OW 71 442 190 761 339 316 34 0
VODI 0 319 202 1025 569 703 22 0
ODI 0 93 80 648 771 717 69 0
CDI 0 44 37 375 765 966 300 8
VCDI 0 46 45 306 1454 8270 18548 54857

Date: 2023-12-20:

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 77379 12062 588 933 492 407 115 0
OW 97 550 166 685 370 273 10 0
VODI 6 232 83 708 811 775 67 0
ODI 0 85 70 434 782 557 175 0
CDI 0 61 60 303 956 956 485 15
VCDI 0 38 52 428 1529 8116 20951 54186
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 77388 12047 585 895 571 508 119 0
OW 94 553 147 672 305 334 10 0
VODI 0 237 122 752 819 692 107 0
ODI 0 137 74 532 744 612 258 0
CDI 0 46 42 264 998 885 461 8
VCDI 0 8 49 376 1503 8053 20848 54193

Date: 2023-12-22:

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


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