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

Validation of sea ice concentration - Full domain

Bulletin date: 2023-07-13

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

Model vs. observations, sea ice class contingency tables

Date: 2023-07-07:

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 87209 23524 1098 1525 326 91 3 0
OW 6 764 491 1101 641 98 15 0
VODI 0 328 319 1956 2514 262 56 0
ODI 0 47 60 725 4910 1868 75 0
CDI 0 21 45 456 5746 19815 1044 0
VCDI 0 1 0 19 1577 21689 6623 0
...date precedes bulletin

Date: 2023-07-09:

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 88697 22601 1144 1565 432 92 0 0
OW 5 1028 480 1282 796 115 0 0
VODI 0 415 308 1991 2848 412 19 0
ODI 0 63 55 778 4683 1567 72 0
CDI 0 36 52 578 10117 15905 771 0
VCDI 0 1 0 18 1885 21342 4895 0
...date precedes bulletin

Date: 2023-07-11:

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 87195 25722 1139 1395 397 55 0 0
OW 2 537 445 1075 373 28 0 0
VODI 0 211 328 2695 2263 145 5 0
ODI 0 28 50 1061 9110 2474 34 0
CDI 0 9 35 201 7924 24050 1375 0
VCDI 0 1 0 12 1079 11023 4572 0
...date precedes bulletin

Date: 2023-07-13:

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 89733 23803 1131 1451 445 27 0 0
OW 1 721 524 1518 490 34 0 0
VODI 0 291 365 2755 2689 207 10 0
ODI 0 57 92 1127 9989 2350 51 0
CDI 0 43 49 213 9052 21986 715 0
VCDI 0 5 0 13 1084 11326 2701 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 89733 23870 1163 1558 496 28 0 0
OW 1 629 466 1437 549 44 0 0
VODI 0 311 375 2665 2668 229 11 0
ODI 0 65 112 1174 9428 2135 55 0
CDI 0 40 45 231 9512 21937 787 0
VCDI 0 5 0 12 1096 11557 2624 0

Date: 2023-07-15:

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 92570 22123 1018 1392 368 31 0 0
OW 0 925 656 1835 593 44 0 0
VODI 0 362 376 2691 3054 342 13 0
ODI 0 54 108 1218 10329 2492 54 0
CDI 0 46 28 248 11173 17570 1263 0
VCDI 0 5 0 15 1614 10618 1820 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 92570 22202 1082 1645 427 39 0 0
OW 0 841 547 1609 626 70 1 0
VODI 0 340 412 2674 3048 303 20 0
ODI 0 88 114 1197 9470 2317 59 0
CDI 0 39 31 266 11968 17476 1267 0
VCDI 0 5 0 8 1592 10892 1803 0

Date: 2023-07-17:

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 94727 21375 1077 1196 267 49 0 0
OW 0 921 680 1235 187 25 0 0
VODI 0 276 492 3755 2088 63 4 0
ODI 0 32 38 1297 16167 2170 19 0
CDI 0 10 12 81 5838 23078 606 0
VCDI 0 4 0 0 22 8120 1137 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 94727 20796 1144 1863 426 54 0 0
OW 0 1131 531 1566 850 69 4 0
VODI 0 521 470 2535 3714 266 17 0
ODI 0 115 113 1317 9485 2710 46 0
CDI 0 50 41 264 9972 18107 559 0
VCDI 0 5 0 19 122 12299 1140 0

Date: 2023-07-19:

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 95112 22341 1231 1380 310 35 0 0
OW 0 896 671 1745 344 22 0 0
VODI 0 224 382 3559 3134 155 2 0
ODI 0 20 38 1299 15140 1754 42 0
CDI 0 16 10 134 6171 21864 655 0
VCDI 0 4 0 0 25 7029 1304 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 95112 21446 1201 2064 551 45 0 0
OW 0 1247 549 1757 972 76 1 0
VODI 0 637 449 2704 3938 355 11 0
ODI 0 112 94 1186 10085 1795 72 0
CDI 0 55 39 397 9430 17459 615 0
VCDI 0 4 0 9 148 11129 1304 0

Date: 2023-07-21:

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 95885 22763 1312 1460 227 39 0 0
OW 0 971 791 2229 500 26 0 0
VODI 0 230 292 3631 3697 176 4 0
ODI 0 27 53 1612 13539 1767 21 0
CDI 0 10 11 162 7508 20454 344 0
VCDI 0 4 0 0 63 6145 1095 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 95885 21650 1369 2593 667 55 0 0
OW 0 1351 474 1596 1060 64 0 0
VODI 0 799 462 2781 4116 577 3 0
ODI 0 131 107 1476 9442 1664 53 0
CDI 0 69 42 631 9975 15344 190 0
VCDI 0 5 5 17 274 10903 1218 0


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