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: 2023-06-29

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

Model vs. observations, sea ice class contingency tables

Date: 2023-06-23:

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 77374 21263 1650 4718 1110 54 6 0
OW 14 809 379 1838 1056 164 23 0
VODI 0 358 222 1287 2578 503 68 0
ODI 0 173 108 518 2542 1515 255 0
CDI 0 75 128 619 3801 8101 2180 0
VCDI 0 0 3 63 1096 11542 25567 13288
...date precedes bulletin

Date: 2023-06-25:

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 77988 22668 1898 4416 848 71 4 0
OW 11 791 367 1606 1150 214 31 0
VODI 0 367 221 1108 2146 582 78 0
ODI 0 168 102 508 2473 1873 128 0
CDI 0 120 124 562 3273 9884 2097 0
VCDI 0 0 1 11 763 13070 30633 4693
...date precedes bulletin

Date: 2023-06-27:

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 79549 23826 1954 3490 607 35 6 0
OW 10 471 367 1350 591 95 9 0
VODI 0 213 225 1628 1789 298 17 0
ODI 0 56 116 834 3815 1956 65 0
CDI 0 28 46 395 3005 11675 1376 0
VCDI 0 0 1 7 392 14139 30338 2274
...date precedes bulletin

Date: 2023-06-29:

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 80488 24505 1826 2927 617 47 1 0
OW 9 542 402 1412 741 70 3 0
VODI 0 206 206 1416 2204 478 17 0
ODI 0 67 92 698 3589 2038 71 0
CDI 0 35 60 407 2708 12579 2677 0
VCDI 0 0 2 4 307 14452 25176 3969
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 80488 24590 1885 3102 696 55 1 0
OW 9 461 348 1212 733 73 3 0
VODI 0 207 197 1421 2005 477 22 0
ODI 0 62 94 706 3581 1962 76 0
CDI 0 35 62 420 2853 12626 2699 0
VCDI 0 0 2 3 298 14471 25144 3969

Date: 2023-07-01:

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 82040 25080 1432 2153 479 38 1 0
OW 8 734 417 1432 807 108 2 0
VODI 0 210 216 1232 2119 1084 34 0
ODI 0 58 85 562 3013 2424 80 0
CDI 0 48 68 442 3103 15593 2165 0
VCDI 0 0 1 16 1401 20717 17370 276
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 82041 25276 1499 2354 601 61 2 0
OW 7 543 344 1221 759 128 4 0
VODI 0 203 219 1240 1990 972 34 0
ODI 0 64 93 552 2957 2437 73 0
CDI 0 44 63 464 3152 15436 2158 0
VCDI 0 0 1 6 1463 20930 17381 276

Date: 2023-07-03:

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 82437 25802 1330 1842 394 32 0 0
OW 7 566 455 1024 396 45 1 0
VODI 0 181 298 1747 1508 220 7 0
ODI 0 36 70 880 5414 2213 26 0
CDI 0 7 23 262 2846 23449 1343 0
VCDI 0 0 1 14 472 19069 12614 17
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 82438 25645 1424 2367 750 113 0 0
OW 6 539 354 1094 847 185 24 0
VODI 0 279 242 1214 2430 839 17 0
ODI 0 83 93 612 3043 2218 65 0
CDI 0 46 63 467 3155 18176 1780 0
VCDI 0 0 1 15 805 23497 12105 17

Date: 2023-07-05:

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 86253 23755 1057 1617 305 69 3 0
OW 6 754 425 993 502 85 2 0
VODI 0 309 329 1679 2094 236 13 0
ODI 0 40 74 749 5033 2149 67 0
CDI 0 5 23 360 5157 19637 2019 0
VCDI 0 0 0 21 1976 20496 8756 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 86253 23311 1120 2024 762 188 6 0
OW 6 839 357 1021 1000 206 9 0
VODI 0 531 259 1088 2541 712 36 0
ODI 0 147 109 726 3007 2134 137 0
CDI 0 35 63 521 5433 16725 1550 0
VCDI 0 0 0 39 2324 22707 9122 0

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
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 87210 22977 1160 1980 868 204 37 0
OW 5 941 394 1160 1287 193 46 0
VODI 0 514 257 1195 2557 470 58 0
ODI 0 178 117 793 3191 1933 62 0
CDI 0 74 85 636 6039 17896 1282 0
VCDI 0 1 0 18 1772 23127 6331 0


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