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

Validation of sea ice concentration - American sector

Bulletin date: 2025-09-25

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

Model vs. observations, sea ice class contingency tables

Date: 2025-09-19:

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 32535 6143 86 66 0 0 0 0
OW 37 1639 393 728 48 0 0 0
VODI 0 104 103 1083 969 43 0 0
ODI 0 0 3 142 990 1619 11 0
CDI 0 0 0 47 785 3616 197 0
VCDI 0 0 0 0 91 4661 4986 106
...date precedes bulletin

Date: 2025-09-21:

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 33442 4949 46 46 0 0 0 0
OW 178 1769 264 569 68 0 0 0
VODI 0 175 72 797 1073 33 0 0
ODI 0 11 4 233 1083 1350 0 0
CDI 0 6 0 115 790 3334 131 0
VCDI 0 0 0 1 47 5297 5270 78
...date precedes bulletin

Date: 2025-09-23:

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 34237 4450 103 53 0 0 0 0
OW 291 1159 163 556 126 0 0 0
VODI 52 226 77 607 1004 95 0 0
ODI 0 30 20 207 744 1369 18 0
CDI 0 8 4 118 731 3245 857 0
VCDI 0 0 0 4 38 3606 5905 1128
...date precedes bulletin

Date: 2025-09-25:

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

Date: 2025-09-27:

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

Date: 2025-09-29:

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

Date: 2025-10-01:

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 31096 4985 387 151 1 0 0 0
OW 281 1046 258 437 28 0 0 0
VODI 2 117 84 940 284 3 0 0
ODI 0 21 8 302 880 24 0 0
CDI 0 12 0 14 862 963 0 0
VCDI 0 0 0 0 203 3477 8419 5946
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 30910 4569 422 228 42 1 0 0
OW 469 1118 157 533 351 48 0 0
VODI 0 479 137 717 686 325 6 0
ODI 0 15 21 254 476 714 91 0
CDI 0 0 0 111 486 900 838 0
VCDI 0 0 0 1 217 2479 7484 5946

Date: 2025-10-03:

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


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