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: 2025-05-20

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

Model vs. observations, sea ice class contingency tables

Date: 2025-05-20:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 96 4 72 4 0 0 0
OW 0 26 1 43 16 5 0 0
VODI 0 124 12 193 134 95 34 23
ODI 0 107 12 301 289 276 226 280
CDI 0 16 2 217 482 886 1835 1963
VCDI 0 3 0 111 736 2898 13291 20781

Date: 2025-05-22:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 237 17 194 71 16 1 0
OW 0 71 7 81 74 30 1 0
VODI 0 100 13 208 156 134 39 42
ODI 0 64 8 197 228 397 261 307
CDI 0 25 3 221 346 774 1289 2380
VCDI 0 8 0 222 779 2722 11105 22766

Date: 2025-05-24:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 433 35 295 156 40 2 0
OW 0 55 16 79 79 39 18 0
VODI 0 121 12 188 179 212 105 16
ODI 0 22 7 196 240 463 321 297
CDI 0 6 0 165 331 757 1391 2044
VCDI 0 10 0 317 825 3631 12691 19800

Date: 2025-05-26:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 639 22 319 258 69 28 3
OW 0 40 0 62 61 46 12 12
VODI 0 92 4 136 168 225 143 37
ODI 0 35 3 193 290 445 538 265
CDI 0 21 1 218 412 866 2002 1755
VCDI 0 20 2 312 958 4143 16493 14246


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