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: 2025-04-22

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

Model vs. observations, sea ice class contingency tables

Date: 2025-04-22:

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 2 1 0 0
OW 0 0 0 1 2 1 0 0
VODI 0 0 0 3 34 59 11 0
ODI 0 0 0 17 79 141 159 65
CDI 0 0 0 86 201 536 823 589
VCDI 0 0 0 26 227 1434 12413 28684

Date: 2025-04-24:

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 1 20 15 0 0
OW 0 0 0 6 5 8 2 0
VODI 0 2 0 12 21 46 41 1
ODI 0 7 0 23 49 119 205 50
CDI 0 20 0 71 156 377 886 608
VCDI 0 0 0 30 247 1246 13345 27975

Date: 2025-04-26:

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 22 12 6 0
OW 0 0 0 2 7 7 3 0
VODI 0 0 0 12 20 22 32 0
ODI 0 0 0 34 56 120 168 29
CDI 0 0 0 104 161 353 1060 524
VCDI 0 0 0 96 345 1264 13412 27721

Date: 2025-04-28:

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 15 25 8 1 0
OW 0 0 0 6 7 1 0 0
VODI 0 0 0 12 39 14 28 1
ODI 0 13 0 46 92 116 204 42
CDI 0 2 0 117 170 322 780 709
VCDI 0 0 0 160 389 1818 13344 27113


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