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: 2023-06-08

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-06-12

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 3 3 0 0 0
OW 0 0 4 13 6 0 0 0
VODI 0 0 2 18 1 5 0 0
ODI 0 0 0 21 20 15 2 0
CDI 0 0 0 6 92 576 38 0
VCDI 0 0 0 0 31 6305 22213 7528
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 5 6 0 0 0
OW 0 0 0 4 3 5 0 0
VODI 0 0 3 7 8 11 4 0
ODI 0 0 3 15 1 22 11 0
CDI 0 0 0 30 81 382 272 9
VCDI 0 0 0 0 54 6481 21966 7519

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 43 0 0 1 0 0 0
OW 0 6 1 31 6 0 3 0
VODI 0 4 2 40 76 0 9 0
ODI 0 4 1 2 105 0 9 0
CDI 0 0 0 0 22 16 19 1
VCDI 0 0 0 0 3 365 408 1956
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 1 0 0 0
OW 0 20 1 60 34 0 4 0
VODI 0 12 1 11 133 0 12 0
ODI 0 2 1 1 19 1 15 0
CDI 0 6 1 1 20 7 38 8
VCDI 0 0 0 0 6 373 379 1949

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 72 5 95 64 0 0 0
OW 0 34 10 41 26 0 0 0
VODI 0 37 7 28 25 0 0 0
ODI 0 36 32 96 74 1 0 0
CDI 0 3 12 57 111 227 41 0
VCDI 0 0 0 27 68 371 3352 5030
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 2 1 100 81 0 0 0
OW 0 14 4 23 27 0 0 0
VODI 0 19 4 19 28 0 0 0
ODI 0 35 4 18 30 0 0 0
CDI 0 60 24 50 52 54 10 0
VCDI 0 52 29 134 150 545 3383 5030

Chuckchi Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 218 56 113 0 0 0 0
OW 0 55 26 83 0 0 0 0
VODI 0 1 3 103 13 0 0 0
ODI 0 0 0 28 87 8 0 0
CDI 0 0 0 0 131 224 57 0
VCDI 0 0 0 0 0 376 3966 106
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 162 31 122 0 0 0 0
OW 0 47 13 38 0 0 0 0
VODI 0 27 20 56 0 0 0 0
ODI 0 36 20 61 44 5 1 0
CDI 0 2 1 50 185 239 296 0
VCDI 0 0 0 0 2 364 3726 106

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 9 2 20 2 0 0 0
OW 0 19 13 17 6 0 0 0
VODI 0 7 3 38 17 0 2 0
ODI 0 4 8 33 158 24 12 0
CDI 0 0 0 63 732 1538 120 0
VCDI 0 0 0 0 15 505 3871 8
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 2 1 9 0 0 0 0
OW 0 4 1 13 0 0 0 0
VODI 0 8 2 20 17 1 9 0
ODI 0 7 6 16 103 13 18 0
CDI 0 18 16 65 364 658 399 0
VCDI 0 0 0 48 446 1395 3579 8

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 67 8 17 1 0 0 0
OW 0 12 36 91 12 0 0 0
VODI 0 0 15 169 57 2 0 0
ODI 0 0 0 116 378 78 3 0
CDI 0 0 0 42 657 1208 43 0
VCDI 0 0 0 0 177 205 1861 71
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 38 5 26 5 0 0 0
OW 0 27 10 52 9 1 0 0
VODI 0 14 26 88 48 6 0 0
ODI 0 0 15 90 146 57 3 0
CDI 0 0 3 175 650 988 517 15
VCDI 0 0 0 4 424 441 1387 56

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1 1330 129 98 7 0 0 0
OW 0 19 55 199 41 0 0 0
VODI 0 0 2 237 220 2 0 0
ODI 0 0 0 31 374 46 1 0
CDI 0 0 0 0 163 879 209 0
VCDI 0 0 0 0 0 137 1942 209
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1 1293 123 205 89 0 0 0
OW 0 41 43 115 133 1 0 0
VODI 0 14 16 155 191 76 0 0
ODI 0 1 4 72 181 229 1 0
CDI 0 0 0 18 211 577 311 9
VCDI 0 0 0 0 0 181 1840 200

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8326 2264 61 48 0 0 0 0
OW 0 16 40 96 15 0 0 0
VODI 0 0 4 117 85 6 0 0
ODI 0 0 0 20 156 25 0 0
CDI 0 0 0 0 26 26 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8326 2151 42 63 4 0 0 0
OW 0 67 26 72 17 0 0 0
VODI 0 50 17 61 96 7 0 0
ODI 0 12 20 50 95 18 0 0
CDI 0 0 0 35 70 32 0 0
VCDI 0 0 0 0 0 0 0 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 5151 2453 192 515 31 0 0 0
OW 0 1 5 206 49 0 0 0
VODI 0 0 0 212 208 0 0 0
ODI 0 0 0 7 695 11 0 0
CDI 0 0 0 0 285 1046 122 0
VCDI 0 0 0 0 0 55 452 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5151 2454 197 669 100 0 0 0
OW 0 0 0 185 139 0 0 0
VODI 0 0 0 85 303 0 0 0
ODI 0 0 0 1 430 40 5 0
CDI 0 0 0 0 296 1071 356 0
VCDI 0 0 0 0 0 1 213 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 7329 3729 218 462 45 0 0 0
OW 0 5 6 160 94 0 0 0
VODI 0 0 0 196 352 0 0 0
ODI 0 0 0 3 336 20 0 0
CDI 0 0 0 0 9 24 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7329 3729 219 682 255 0 0 0
OW 0 5 4 109 215 4 0 0
VODI 0 0 1 30 229 12 0 0
ODI 0 0 0 0 137 25 0 0
CDI 0 0 0 0 0 3 0 0
VCDI 0 0 0 0 0 0 0 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 0 987 168 353 32 0 0 0
OW 0 2 11 228 62 0 0 0
VODI 0 0 1 202 274 0 0 0
ODI 0 0 0 3 872 97 0 0
CDI 0 0 0 0 192 1451 186 0
VCDI 0 0 0 0 0 78 604 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 978 159 488 77 0 0 0
OW 0 11 13 149 178 0 0 0
VODI 0 0 8 112 362 33 0 0
ODI 0 0 0 37 561 292 17 0
CDI 0 0 0 0 254 1221 524 0
VCDI 0 0 0 0 0 80 249 0

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 1865 327 673 25 0 0 0
OW 0 178 71 449 149 0 0 0
VODI 0 47 26 425 732 43 0 0
ODI 0 0 0 17 1436 413 0 0
CDI 0 0 0 0 274 880 19 0
VCDI 0 0 0 0 8 77 416 37
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 1712 310 760 157 1 0 0
OW 0 91 26 198 304 29 0 0
VODI 0 79 35 269 533 91 16 0
ODI 0 54 15 101 769 135 26 0
CDI 0 154 38 236 844 1075 49 0
VCDI 0 0 0 0 17 82 344 37

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13809 3345 195 691 151 0 0 0
OW 0 3 5 276 135 3 0 0
VODI 0 0 0 216 495 9 0 0
ODI 0 0 0 0 648 89 0 0
CDI 0 0 0 0 10 129 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13809 3346 191 846 227 5 0 0
OW 0 2 8 185 336 14 0 0
VODI 0 0 1 135 665 59 0 0
ODI 0 0 0 17 202 146 0 0
CDI 0 0 0 0 9 6 0 0
VCDI 0 0 0 0 0 0 0 0


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