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

Validation of sea ice concentration - American sector

Bulletin date: 2025-04-29

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

Model vs. observations, sea ice class contingency tables

Date: 2025-04-29:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 1 0 5 9 7 7 1
ODI 0 12 0 50 62 109 156 53
CDI 0 17 3 156 272 420 885 569
VCDI 0 1 0 87 435 2065 13182 27030

Date: 2025-05-01:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 2 0 15 5 21 24 1
ODI 0 32 1 27 103 106 161 77
CDI 0 7 1 109 310 388 869 508
VCDI 0 1 0 84 517 2285 12596 27344

Date: 2025-05-03:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 0 0 2 0 0 2 0
OW 0 0 0 2 0 2 4 0
VODI 0 4 0 9 11 21 45 3
ODI 0 28 0 53 114 92 217 110
CDI 0 0 0 40 335 384 992 685
VCDI 0 0 0 12 470 1913 12308 27736

Date: 2025-05-05:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 0 0 4 0 0 2 2
OW 0 0 0 4 1 2 3 14
VODI 0 0 0 26 6 25 51 23
ODI 0 0 0 35 95 117 259 133
CDI 0 0 0 7 323 481 977 652
VCDI 0 0 0 5 391 1925 10972 29059


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