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: 2025-02-06

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

Model vs. observations, sea ice class contingency tables

Date: 2025-01-31:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 0 2 1 0 0
ODI 0 0 0 17 8 11 0 0
CDI 0 0 2 22 61 87 13 0
VCDI 0 0 0 47 216 2029 14385 28965
...date precedes bulletin

Date: 2025-02-02:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 1 0 0 7 0 0
ODI 0 1 0 5 11 15 0 0
CDI 0 2 2 15 48 99 6 0
VCDI 0 1 3 47 245 2648 14134 28576
...date precedes bulletin

Date: 2025-02-04:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 1 3 0 0 0
ODI 0 0 0 1 14 22 0 0
CDI 0 0 0 1 45 139 14 0
VCDI 0 0 0 7 158 2925 18542 23994
...date precedes bulletin

Date: 2025-02-06:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 0 0 0 0 0
ODI 0 0 0 0 2 3 0 0
CDI 0 0 0 0 20 89 19 0
VCDI 0 0 0 0 104 2611 20325 22693
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 0 0 0 0 0 0 0
ODI 0 0 0 0 2 3 0 0
CDI 0 0 0 0 21 87 19 0
VCDI 0 0 0 0 103 2613 20325 22693

Date: 2025-02-08:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 0 0 0 0 0
ODI 0 0 0 0 0 2 0 0
CDI 0 0 0 0 0 26 22 0
VCDI 0 0 0 0 4 1708 16693 27411
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 0 0 0 0 0 0 0
ODI 0 0 0 0 0 2 0 0
CDI 0 0 0 0 0 30 37 1
VCDI 0 0 0 0 4 1704 16678 27410

Date: 2025-02-10:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 0 0 0 0 0
ODI 0 0 0 0 0 5 0 0
CDI 0 0 0 0 5 39 38 1
VCDI 0 0 0 0 5 1340 15822 28611
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 0 0 0 0 0 0 0
ODI 0 0 0 0 0 5 1 0
CDI 0 0 0 0 0 24 66 3
VCDI 0 0 0 0 10 1355 15793 28609

Date: 2025-02-12:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 0 0 0 0 0
ODI 0 0 0 0 2 1 0 0
CDI 0 0 0 0 15 47 33 31
VCDI 0 0 0 10 91 1335 14918 29383
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 0 0 0 0 0 5 0
ODI 0 0 0 0 1 8 12 0
CDI 0 0 0 1 7 90 107 2
VCDI 0 0 0 9 100 1285 14827 29412

Date: 2025-02-14:

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 3 1 1 2 0 0 0
ODI 0 6 2 9 13 4 0 0
CDI 0 6 2 11 20 80 20 2
VCDI 0 2 18 51 131 2558 14871 28053
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 0 0 0 1 0
ODI 0 5 2 8 0 7 15 0
CDI 0 5 2 10 38 138 131 63
VCDI 0 5 19 54 128 2497 14744 27992


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