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: 2023-05-11

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-05-15

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 2 1 0 0
OW 0 0 0 0 4 4 0 0
VODI 0 0 0 0 0 14 0 0
ODI 0 0 0 0 1 16 0 0
CDI 0 0 0 1 6 97 57 0
VCDI 0 0 0 0 62 285 5853 30499
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 4 5 0 0
OW 0 0 0 0 2 11 0 0
VODI 0 0 0 0 0 25 1 0
ODI 0 0 0 0 0 31 48 0
CDI 0 0 0 1 3 62 61 0
VCDI 0 0 0 0 66 283 5800 30499

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 3 19 12 43 0
VCDI 0 0 0 28 43 199 1770 1016
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 9 18 2 52 3
VCDI 0 0 0 22 44 209 1761 1013

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 1 0 0 0 0
VODI 0 28 26 55 11 0 0 0
ODI 0 9 18 44 47 16 7 0
CDI 0 0 0 3 218 214 73 0
VCDI 0 0 0 11 93 2744 6068 296
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 10 7 0
CDI 0 5 11 39 52 58 49 0
VCDI 0 32 33 75 314 2906 6092 296

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 5 8 0 0 0
VODI 0 0 0 38 8 1 0 0
ODI 0 0 0 24 11 3 6 0
CDI 0 0 0 51 57 19 24 10
VCDI 0 0 0 0 91 335 2539 2424
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 2 6 0 0 0
VODI 0 0 0 24 11 2 2 0
ODI 0 0 0 16 5 4 15 0
CDI 0 0 0 35 24 8 21 9
VCDI 0 0 0 41 129 344 2531 2425

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 3 11 0
CDI 0 0 0 0 0 37 104 15
VCDI 0 0 0 0 0 358 2407 4311
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 51 0
CDI 0 0 0 0 0 25 136 22
VCDI 0 0 0 0 0 369 2335 4304

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 1 0 0 0
ODI 0 0 0 0 11 5 4 0
CDI 0 0 0 0 25 69 44 0
VCDI 0 0 0 0 6 244 3064 1853
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 1 0 0 0
ODI 0 0 0 0 3 0 3 0
CDI 0 0 0 0 20 44 57 0
VCDI 0 0 0 0 19 274 3052 1853

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 52 0 0 0 0 0 0
OW 0 14 1 7 1 0 0 0
VODI 0 12 7 19 32 3 0 0
ODI 0 9 3 9 67 42 0 0
CDI 0 2 8 40 117 413 27 0
VCDI 0 0 0 0 10 723 3872 841
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 17 0 0 0 0 0 0
OW 0 16 0 1 0 0 0 0
VODI 0 18 0 16 18 2 0 0
ODI 0 16 1 12 56 32 1 0
CDI 0 18 7 2 72 169 24 0
VCDI 0 4 11 44 81 978 3874 841

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5148 3109 158 196 7 0 0 0
OW 0 19 22 136 33 0 0 0
VODI 0 2 10 136 112 2 0 0
ODI 0 0 0 26 203 31 0 0
CDI 0 0 0 3 238 671 2 0
VCDI 0 0 0 0 18 1016 33 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5148 3086 157 227 18 0 0 0
OW 0 21 18 126 58 0 0 0
VODI 0 15 5 81 86 1 0 0
ODI 0 7 2 41 95 20 0 0
CDI 0 1 8 22 270 113 1 0
VCDI 0 0 0 0 84 1586 34 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 4781 2866 158 167 13 0 0 0
OW 0 2 15 132 19 0 0 0
VODI 0 0 0 124 96 2 0 0
ODI 0 0 0 25 286 5 1 0
CDI 0 0 0 0 521 933 10 0
VCDI 0 0 0 0 4 578 958 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4781 2857 139 174 20 0 0 0
OW 0 11 29 100 27 1 0 0
VODI 0 0 5 123 85 6 0 0
ODI 0 0 0 40 147 20 0 0
CDI 0 0 0 11 463 236 2 0
VCDI 0 0 0 0 197 1255 967 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 7402 3506 176 275 70 52 1 0
OW 0 2 23 125 30 15 6 0
VODI 0 0 0 73 95 19 7 0
ODI 0 0 0 4 209 27 6 0
CDI 0 0 0 0 98 236 67 0
VCDI 0 0 0 0 0 13 451 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7402 3506 190 341 106 72 9 0
OW 0 2 9 100 61 19 6 0
VODI 0 0 0 36 115 47 8 0
ODI 0 0 0 0 97 90 49 0
CDI 0 0 0 0 123 134 356 0
VCDI 0 0 0 0 0 0 110 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 0 327 59 17 0 0 0 0
OW 0 11 33 105 0 0 0 0
VODI 0 8 7 137 48 0 0 0
ODI 0 3 13 142 174 4 1 0
CDI 0 0 0 50 370 442 29 0
VCDI 0 0 0 0 55 556 3024 188
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 247 26 15 0 0 0 0
OW 0 29 9 46 0 0 0 0
VODI 0 35 36 56 21 0 0 0
ODI 0 25 22 123 51 1 1 0
CDI 0 12 12 118 318 149 168 0
VCDI 0 1 7 93 257 852 2885 188

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 7 11 77 1 0 0 0
OW 0 0 8 143 36 0 0 0
VODI 0 0 0 139 224 9 1 0
ODI 0 0 0 32 401 143 6 0
CDI 0 0 0 38 214 1195 152 6
VCDI 0 0 0 0 18 1026 4388 312
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 1 8 91 20 0 0 0
OW 0 5 9 103 38 4 0 0
VODI 0 1 2 101 205 80 3 0
ODI 0 0 0 63 235 212 15 0
CDI 0 0 0 56 313 703 404 1
VCDI 0 0 0 15 83 1374 4125 317

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11121 5591 217 250 43 0 0 0
OW 0 27 58 283 53 0 0 0
VODI 0 0 0 182 326 5 0 0
ODI 0 0 0 2 391 67 0 0
CDI 0 0 0 0 94 528 80 0
VCDI 0 0 0 0 1 184 706 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11121 5605 223 379 64 0 0 0
OW 0 12 45 201 96 2 0 0
VODI 0 1 7 126 268 27 0 0
ODI 0 0 0 10 299 109 29 0
CDI 0 0 0 1 168 441 195 0
VCDI 0 0 0 0 13 205 562 0


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