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: 2025-10-09

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-10-03:

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

Date: 2025-10-05:

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

Date: 2025-10-07:

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

Date: 2025-10-09:

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

Date: 2025-10-11:

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 127547 13492 445 447 24 0 0 0
OW 101 1170 528 1011 270 15 0 0
VODI 7 169 125 1120 1015 140 0 0
ODI 0 108 16 283 1008 596 53 0
CDI 0 75 70 269 1078 2320 634 0
VCDI 0 0 0 20 153 15296 21705 3433
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 127604 13512 481 529 66 0 0 0
OW 47 1132 459 997 265 21 0 0
VODI 4 193 154 1016 1012 117 0 0
ODI 0 88 18 303 1019 641 25 0
CDI 0 89 72 270 996 2479 709 0
VCDI 0 0 0 35 190 15109 21658 3433

Date: 2025-10-13:

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 128626 11438 1014 247 4 10 0 0
OW 132 1297 845 1149 45 20 0 0
VODI 2 91 318 980 600 20 0 0
ODI 1 2 215 358 1214 123 0 0
CDI 0 0 425 186 978 3333 200 0
VCDI 0 0 596 4012 1569 9807 17094 7792
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 128628 10917 1086 376 19 14 0 0
OW 127 1429 550 752 271 27 0 0
VODI 5 320 435 936 692 170 3 0
ODI 0 70 245 349 846 617 47 0
CDI 1 92 520 330 869 2249 568 0
VCDI 0 0 577 4189 1713 10236 16676 7792

Date: 2025-10-15:

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 124259 14277 827 854 93 0 0 0
OW 170 964 358 1800 337 5 0 0
VODI 33 44 70 932 1163 63 0 0
ODI 1 0 2 352 1138 350 10 0
CDI 0 0 0 197 1060 2769 561 0
VCDI 1 0 0 54 877 11841 18308 10973
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 124197 13508 722 997 152 15 0 0
OW 201 1291 342 1170 395 64 4 0
VODI 64 324 139 1145 989 162 27 0
ODI 1 94 10 351 1088 624 80 0
CDI 0 50 10 201 777 2032 1268 0
VCDI 1 18 34 325 1267 12131 17500 10973

Date: 2025-10-17:

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 123913 13276 596 679 119 0 0 0
OW 359 1202 429 1582 380 34 0 0
VODI 102 131 93 1043 1370 240 0 0
ODI 1 36 27 267 1034 681 23 0
CDI 0 4 24 260 833 2469 1014 0
VCDI 1 0 0 1 212 12141 19193 10974
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 123804 12245 610 1090 345 54 0 0
OW 290 1537 269 1097 522 125 9 0
VODI 234 439 179 901 1143 359 63 0
ODI 46 142 33 261 855 758 269 0
CDI 1 135 18 164 548 1430 1654 8
VCDI 1 151 60 319 535 12839 18235 10966


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