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

Validation of sea ice concentration - Full domain

Bulletin date: 2025-03-25

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

Model vs. observations, sea ice class contingency tables

Date: 2025-03-25:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17001 14142 226 537 51 0 0 0
OW 3 354 28 149 12 0 0 0
VODI 3 464 62 322 93 4 1 0
ODI 0 384 70 470 259 79 22 31
CDI 0 235 58 573 714 819 556 573
VCDI 0 103 10 531 2023 7716 20772 65095

Date: 2025-03-27:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17636 14352 144 814 104 3 0 0
OW 0 252 14 133 51 0 0 0
VODI 0 344 25 299 158 10 0 0
ODI 0 211 15 316 303 119 51 31
CDI 0 214 23 391 737 1147 856 429
VCDI 0 120 20 598 1981 7296 22321 63027

Date: 2025-03-29:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17778 14463 154 997 159 4 0 0
OW 0 232 9 152 91 6 0 0
VODI 0 235 9 285 187 27 1 2
ODI 0 143 16 301 319 258 124 50
CDI 0 128 14 384 765 1423 1118 591
VCDI 0 90 12 481 1624 6962 23946 61005

Date: 2025-03-31:

Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17594 14563 95 1254 310 25 0 0
OW 1 85 11 151 97 9 1 0
VODI 6 105 11 219 188 65 13 11
ODI 1 67 11 195 285 275 176 57
CDI 1 76 2 200 751 1405 1315 475
VCDI 0 58 7 285 1473 7474 28749 56393


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