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: 2025-05-13

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

Model vs. observations, sea ice class contingency tables

Date: 2025-05-13:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 1 0 3 1 0 0 0
OW 0 5 1 19 6 1 0 8
VODI 0 33 1 58 57 81 24 32
ODI 0 38 1 84 231 208 216 102
CDI 0 85 11 120 682 764 1168 655
VCDI 0 35 1 143 1422 3632 16232 19433

Date: 2025-05-15:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 52 1 44 20 1 7 0
OW 0 17 5 34 28 3 16 0
VODI 0 37 3 59 105 32 93 5
ODI 0 20 3 77 214 142 311 63
CDI 0 82 17 124 488 599 1724 467
VCDI 0 7 2 163 867 2849 18605 18208

Date: 2025-05-17:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 123 2 89 49 5 16 0
OW 0 30 1 42 44 13 31 0
VODI 0 34 1 69 138 129 87 3
ODI 0 27 0 108 264 244 304 61
CDI 0 67 0 100 467 675 1608 858
VCDI 0 59 4 280 1036 2469 15597 20460

Date: 2025-05-19:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 146 18 203 87 21 1 17
OW 0 25 2 72 102 91 7 22
VODI 0 12 1 85 146 197 70 46
ODI 0 16 0 99 201 240 345 195
CDI 0 43 0 142 344 571 1978 991
VCDI 0 43 10 244 786 2518 16704 18753


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