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: 2023-07-20

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

Model vs. observations, sea ice class contingency tables

Date: 2023-07-14:

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 93353 20926 1044 1276 393 35 1 0
OW 0 884 575 1659 547 32 1 0
VODI 0 366 382 2611 3004 242 17 0
ODI 0 68 106 1160 10222 2451 62 0
CDI 0 37 36 237 11195 18901 723 0
VCDI 0 5 0 13 1280 11469 1735 0
...date precedes bulletin

Date: 2023-07-16:

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 93437 21579 1081 1427 312 49 0 0
OW 0 1109 641 1962 628 38 0 0
VODI 0 460 390 2554 3428 258 6 0
ODI 0 48 95 1315 10860 2266 43 0
CDI 0 35 29 254 9779 18292 1015 0
VCDI 0 4 0 7 413 11889 1345 0
...date precedes bulletin

Date: 2023-07-18:

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 96508 20269 1166 1394 359 53 1 0
OW 0 806 581 1584 295 25 0 0
VODI 0 218 387 3618 2771 100 1 0
ODI 0 23 37 1466 14616 2809 24 0
CDI 0 13 14 93 5748 22360 820 0
VCDI 0 5 0 0 22 7537 1325 0
...date precedes bulletin

Date: 2023-07-20:

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 97574 20685 1206 1299 269 40 0 0
OW 0 1037 750 1945 346 31 0 0
VODI 0 215 359 3534 3406 177 1 0
ODI 0 27 48 1550 13677 2410 39 0
CDI 0 10 19 151 6371 21277 722 0
VCDI 0 4 0 0 15 6785 1069 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 97574 20819 1262 1603 297 43 0 0
OW 0 892 671 1678 429 29 0 0
VODI 0 227 382 3404 3344 180 1 0
ODI 0 25 44 1620 13623 2450 38 0
CDI 0 11 23 174 6375 21364 722 0
VCDI 0 4 0 0 16 6654 1070 0

Date: 2023-07-22:

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 97925 21166 1392 1667 205 28 1 0
OW 0 943 813 2235 681 38 0 0
VODI 0 206 359 3407 4520 231 14 0
ODI 0 45 41 1439 11991 2576 43 0
CDI 0 9 21 180 6162 21417 509 0
VCDI 0 4 0 0 61 5680 1039 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 97925 21320 1514 1958 330 30 1 0
OW 0 771 667 1943 723 29 0 0
VODI 0 222 366 3338 4364 280 8 0
ODI 0 42 59 1466 12103 2737 47 0
CDI 0 14 20 223 6039 21379 497 0
VCDI 0 4 0 0 61 5515 1053 0

Date: 2023-07-24:

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 98406 21622 1554 1735 175 24 0 0
OW 0 754 678 1368 269 18 0 0
VODI 0 290 486 4941 2197 89 8 0
ODI 0 23 46 1764 15402 1732 28 0
CDI 0 1 9 67 2676 27750 746 0
VCDI 0 4 0 1 10 1660 515 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 98406 21593 1702 2369 448 37 0 0
OW 0 722 574 2006 1026 57 1 0
VODI 0 310 415 3601 4538 582 28 0
ODI 0 48 41 1683 10262 3215 84 0
CDI 0 17 41 213 4399 23495 956 0
VCDI 0 4 0 4 56 3887 228 0

Date: 2023-07-26:

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 97602 23923 1554 1653 202 24 0 0
OW 0 713 689 1785 437 48 0 0
VODI 0 228 387 5201 3257 182 15 0
ODI 0 34 42 1183 13334 2698 69 0
CDI 0 9 14 65 3199 22812 2785 0
VCDI 0 4 0 2 17 2762 119 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 97602 23701 1676 2500 565 43 0 0
OW 0 713 523 2109 1215 112 9 0
VODI 0 406 364 3787 5081 631 49 0
ODI 0 57 84 1309 9346 3212 173 0
CDI 0 30 39 177 4131 21830 2580 0
VCDI 0 4 0 7 108 2698 177 0

Date: 2023-07-28:

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 98823 23681 1500 1481 199 28 0 0
OW 0 869 936 2203 429 51 3 0
VODI 0 229 376 5468 4104 159 4 0
ODI 0 22 44 955 12158 3122 53 0
CDI 0 9 16 50 3192 18406 4299 0
VCDI 0 4 0 2 24 2724 1425 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 98821 23470 1797 2665 575 62 0 0
OW 2 788 519 2655 1284 113 3 0
VODI 0 428 401 3664 5460 684 36 0
ODI 0 91 112 1025 8330 3525 197 0
CDI 0 33 43 142 4393 18021 3951 0
VCDI 0 4 0 8 64 2085 1597 0


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