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: 2023-06-29

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-07-03

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 11 3 2 0 0 0 0
OW 0 4 5 16 0 0 0 0
VODI 0 0 1 42 21 0 0 0
ODI 0 0 0 53 222 8 1 0
CDI 0 0 0 107 924 7475 359 0
VCDI 0 0 0 0 150 13925 13388 185
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 7 5 9 0 0 0 0
OW 0 3 2 16 1 0 0 0
VODI 0 4 0 18 19 2 0 0
ODI 0 1 2 21 82 12 6 0
CDI 0 0 0 156 901 4584 972 0
VCDI 0 0 0 0 314 16810 12770 185

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 0 324 14 21 2 0 0 0
OW 0 6 0 9 7 0 0 0
VODI 0 4 0 1 23 3 0 0
ODI 0 0 0 1 111 62 0 0
CDI 0 0 0 0 160 1283 0 0
VCDI 0 0 0 0 131 712 259 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 315 14 23 3 0 0 0
OW 0 6 0 5 10 1 0 0
VODI 0 9 0 3 19 13 0 0
ODI 0 4 0 1 80 100 0 0
CDI 0 0 0 0 149 857 2 0
VCDI 0 0 0 0 173 1089 257 0

Beaufort Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 948 90 81 4 0 0 0
OW 0 2 4 89 12 0 0 0
VODI 0 0 0 108 93 0 0 0
ODI 0 0 0 16 571 156 0 0
CDI 0 0 0 0 161 4659 0 0
VCDI 0 0 0 0 0 2988 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 907 73 99 23 0 0 0
OW 0 29 4 80 46 0 0 0
VODI 0 14 17 64 221 7 0 0
ODI 0 0 0 44 268 329 0 0
CDI 0 0 0 7 282 3386 0 0
VCDI 0 0 0 0 1 4081 0 0

Chuckchi Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 91 909 62 19 0 0 0 0
OW 0 7 32 111 0 0 0 0
VODI 0 0 0 162 63 0 0 0
ODI 0 0 0 22 604 63 0 0
CDI 0 0 0 0 464 3045 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 91 884 39 18 0 0 0 0
OW 0 27 45 89 5 0 0 0
VODI 0 5 10 143 71 0 0 0
ODI 0 0 0 55 364 169 0 0
CDI 0 0 0 9 684 2663 0 0
VCDI 0 0 0 0 7 276 0 0

Siberian Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 219 52 36 0 0 0 0
OW 0 12 36 108 24 0 0 0
VODI 0 0 0 175 207 47 0 0
ODI 0 0 0 26 1537 222 7 0
CDI 0 0 0 0 175 4307 55 0
VCDI 0 0 0 0 1 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 0 189 52 89 71 1 0 0
OW 0 26 15 86 122 62 12 0
VODI 0 16 14 63 646 165 0 0
ODI 0 0 7 91 831 193 0 0
CDI 0 0 0 16 273 4148 50 0
VCDI 0 0 0 0 1 7 0 0

Laptev Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 408 141 190 18 0 0 0
OW 0 2 28 258 74 0 0 0
VODI 0 0 0 375 242 12 0 0
ODI 0 0 0 34 904 131 0 0
CDI 0 0 0 0 207 1937 148 0
VCDI 0 0 0 0 0 41 176 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 391 132 296 72 6 0 0
OW 0 19 36 276 137 34 0 0
VODI 0 0 1 259 621 172 0 0
ODI 0 0 0 25 422 313 0 0
CDI 0 0 0 1 190 1540 149 0
VCDI 0 0 0 0 3 56 175 0

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 32 2312 235 160 14 1 0 0
OW 0 3 37 363 50 0 0 0
VODI 0 0 0 472 316 6 0 0
ODI 0 0 0 42 990 68 0 0
CDI 0 0 0 19 173 869 145 0
VCDI 0 0 0 0 0 0 24 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 32 2286 199 290 40 1 0 0
OW 0 28 61 300 167 2 0 0
VODI 0 1 12 386 415 13 0 0
ODI 0 0 0 45 685 91 0 0
CDI 0 0 0 35 235 835 169 0
VCDI 0 0 0 0 1 2 0 0

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8292 2820 79 21 0 0 0 0
OW 0 1 9 43 2 0 0 0
VODI 0 0 2 26 14 0 0 0
ODI 0 0 0 1 21 0 0 0
CDI 0 0 0 0 0 0 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 8292 2782 71 16 0 0 0 0
OW 0 24 7 37 2 0 0 0
VODI 0 15 12 31 14 0 0 0
ODI 0 0 0 7 21 0 0 0
CDI 0 0 0 0 0 0 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 5882 2626 210 323 6 0 0 0
OW 0 1 13 202 30 0 0 0
VODI 0 0 0 332 261 1 0 0
ODI 0 0 0 39 974 22 0 0
CDI 0 0 0 3 313 390 29 0
VCDI 0 0 0 0 0 12 27 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5882 2627 214 470 54 0 0 0
OW 0 0 9 210 120 0 0 0
VODI 0 0 0 117 353 5 0 0
ODI 0 0 0 58 427 33 0 0
CDI 0 0 0 44 630 339 16 0
VCDI 0 0 0 0 0 48 40 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 8788 3394 205 406 50 6 0 0
OW 0 0 4 46 23 5 0 0
VODI 0 0 0 31 30 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 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 8788 3394 209 451 102 11 0 0
OW 0 0 0 19 0 0 0 0
VODI 0 0 0 13 1 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 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 25 1994 302 451 86 1 0 0
OW 0 2 40 274 99 4 0 0
VODI 0 0 0 196 412 9 0 0
ODI 0 0 0 13 1565 75 0 0
CDI 0 0 0 0 35 216 4 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 25 1976 296 509 172 0 0 0
OW 0 20 46 207 256 4 0 0
VODI 0 0 0 200 739 13 0 0
ODI 0 0 0 18 1013 178 0 0
CDI 0 0 0 0 17 110 4 0
VCDI 0 0 0 0 0 0 0 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 583 5616 474 910 36 1 0 0
OW 0 4 6 246 13 3 0 0
VODI 0 0 0 129 43 14 0 0
ODI 0 0 0 5 46 22 0 0
CDI 0 0 0 0 61 168 39 0
VCDI 0 0 0 0 3 32 133 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 583 5618 480 1105 53 4 0 0
OW 0 2 0 164 23 10 0 0
VODI 0 0 0 11 19 22 0 0
ODI 0 0 0 9 28 52 26 0
CDI 0 0 0 1 69 119 45 0
VCDI 0 0 0 0 10 33 101 0

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 17505 2314 68 111 0 0 0 0
OW 0 0 0 108 10 0 0 0
VODI 0 0 0 76 12 0 0 0
ODI 0 0 0 1 4 0 0 0
CDI 0 0 0 0 0 0 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 17502 2314 68 156 2 0 0 0
OW 3 0 0 118 10 0 0 0
VODI 0 0 0 20 13 0 0 0
ODI 0 0 0 2 1 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 0 0 0


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