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

Validation of sea ice concentration - GODAE regions

Bulletin date: 2023-04-20

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-04-24

Best estimate

Forecast

Arctic Deep Basin:

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 7 0 0
OW 0 0 0 0 0 16 0 0
VODI 0 0 0 0 0 22 12 0
ODI 0 0 0 1 0 14 38 0
CDI 0 0 0 12 9 20 78 0
VCDI 0 0 0 35 121 427 5301 30789
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 11 0 0
OW 0 0 0 0 0 17 0 0
VODI 0 0 0 0 0 17 17 0
ODI 0 0 0 0 0 16 38 0
CDI 0 0 0 11 8 20 65 0
VCDI 0 0 0 37 122 425 5309 30789

Queen Elisabeth Islands:

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 0 0 0
CDI 0 0 0 0 0 0 0 4
VCDI 0 0 0 0 0 67 530 2532
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 0 0 0
CDI 0 0 0 0 0 0 0 1
VCDI 0 0 0 0 0 67 530 2535

Beaufort Sea:

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 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 74 568 9340
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 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 74 568 9340

Chuckchi Sea:

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 4 8 0 0
CDI 0 0 0 0 9 70 58 0
VCDI 0 0 0 0 4 161 2585 2755
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 3 8 0 0
CDI 0 0 0 0 5 62 43 0
VCDI 0 0 0 0 9 169 2600 2755

Siberian Sea:

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 4 0 0
CDI 0 0 0 0 0 51 18 5
VCDI 0 0 0 0 0 206 3157 3805
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 4 0 0
CDI 0 0 0 0 0 57 16 6
VCDI 0 0 0 0 0 200 3159 3804

Laptev Sea:

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 0 0 0
CDI 0 0 0 0 0 2 4 0
VCDI 0 0 0 0 0 147 2841 2332
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 0 0 0
CDI 0 0 0 0 0 7 22 0
VCDI 0 0 0 0 0 142 2823 2332

Kara Sea:

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 7 0 0 10 1 0 0
ODI 0 8 9 10 23 28 1 0
CDI 0 1 5 49 42 146 45 0
VCDI 0 0 0 59 223 1459 4195 10
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 4 0 0 3 0 0 0
ODI 0 9 0 1 20 28 10 0
CDI 0 3 14 44 37 137 57 0
VCDI 0 0 0 73 238 1469 4174 10

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3447 3786 229 404 75 0 0 0
OW 0 49 46 175 100 4 0 0
VODI 0 29 14 149 124 10 0 0
ODI 0 16 2 81 137 20 0 0
CDI 0 11 1 60 122 93 1 0
VCDI 0 2 0 23 230 1684 207 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3447 3722 229 404 111 1 0 0
OW 0 96 36 137 96 4 0 0
VODI 0 41 21 153 110 9 0 0
ODI 0 16 5 90 123 32 0 0
CDI 0 13 1 67 117 103 2 0
VCDI 0 5 0 41 231 1662 206 0

Greenland Basin:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4257 3075 157 290 73 5 0 0
OW 0 10 18 108 47 10 0 0
VODI 0 4 7 83 82 7 0 0
ODI 0 1 1 34 115 19 0 0
CDI 0 0 1 16 173 207 44 0
VCDI 0 0 0 0 103 1414 1335 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4257 3079 154 293 79 5 0 0
OW 0 10 19 74 52 10 0 0
VODI 0 1 10 82 82 7 0 0
ODI 0 0 1 58 80 27 0 0
CDI 0 0 0 24 176 174 47 0
VCDI 0 0 0 0 124 1439 1332 0

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7444 3575 154 305 131 43 14 0
OW 0 5 8 85 111 21 1 0
VODI 0 0 0 28 114 54 8 0
ODI 0 0 0 0 56 116 17 0
CDI 0 0 0 0 9 382 298 0
VCDI 0 0 0 0 0 0 9 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7444 3578 155 299 147 43 14 0
OW 0 2 7 86 84 18 1 0
VODI 0 0 0 29 106 37 3 0
ODI 0 0 0 4 66 96 13 0
CDI 0 0 0 0 18 417 290 0
VCDI 0 0 0 0 0 5 26 0

Baffin Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 60 8 0 0 0 0 0
OW 0 53 17 13 0 0 0 0
VODI 0 9 18 27 7 0 0 0
ODI 0 0 4 50 13 0 0 0
CDI 0 0 0 32 88 136 23 0
VCDI 0 0 0 3 228 1141 2966 907
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 92 15 1 0 0 0 0
OW 0 22 13 19 1 0 0 0
VODI 0 6 15 24 7 0 0 0
ODI 0 2 3 43 19 0 0 0
CDI 0 0 1 29 85 168 54 0
VCDI 0 0 0 9 224 1109 2935 907

Hudson Bay:

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 6 0 0 0
ODI 0 0 0 4 63 20 0 0
CDI 0 0 0 11 210 206 27 1
VCDI 0 0 0 2 301 1279 4292 2164
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 10 0 0 0
ODI 0 0 0 4 67 19 0 0
CDI 0 0 0 11 221 214 12 0
VCDI 0 0 0 2 282 1272 4307 2165

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10626 5409 177 418 179 33 0 0
OW 0 5 3 89 254 40 0 0
VODI 0 0 0 18 226 140 2 5
ODI 0 0 0 0 159 276 18 16
CDI 0 0 0 0 76 415 218 34
VCDI 0 0 0 0 0 192 1103 78
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10626 5414 180 456 267 36 0 0
OW 0 0 0 52 209 47 0 0
VODI 0 0 0 17 186 144 5 4
ODI 0 0 0 0 150 263 19 11
CDI 0 0 0 0 82 426 244 34
VCDI 0 0 0 0 0 180 1073 84


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