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: 2025-02-06

Model: ARC-MFC PHYS (TOPAZ)

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-02-10

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 0 364 0 0 0 0 0 0
OW 0 136 57 65 0 0 0 0
VODI 0 15 20 132 28 5 0 0
ODI 0 8 10 67 50 23 0 0
CDI 0 0 5 107 231 397 72 0
VCDI 0 0 0 0 119 951 6352 27688
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 346 18 10 0 0 0 0
OW 0 100 20 41 1 0 0 0
VODI 0 36 22 88 23 7 0 0
ODI 0 19 8 68 39 10 0 0
CDI 0 21 20 98 181 261 179 2
VCDI 0 1 4 66 184 1098 6245 27686

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 0
VCDI 0 0 0 0 0 0 42 3077
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 0 42 3077

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 3 1171 8804
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 3 1171 8804

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 0 0 0 0
CDI 0 0 0 0 0 2 12 0
VCDI 0 0 0 0 0 273 1899 3467
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 4 21 0
VCDI 0 0 0 0 0 271 1890 3467

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 0 0 0
CDI 0 0 0 0 0 0 0 1
VCDI 0 0 0 0 0 0 8 7215
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 0 8 7215

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 1 0 0
CDI 0 0 0 0 0 26 5 0
VCDI 0 0 0 0 8 479 2700 2080
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 1 0 0
CDI 0 0 0 0 0 23 8 0
VCDI 0 0 0 0 8 482 2697 2080

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 160 0 0 0 0 0 0
OW 0 128 18 8 0 0 0 0
VODI 0 64 53 119 4 0 0 0
ODI 0 0 10 144 86 0 0 0
CDI 0 0 6 80 412 30 5 1
VCDI 0 0 0 24 396 614 2839 1116
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 107 3 0 0 0 0 0
OW 0 105 5 14 0 0 0 0
VODI 0 103 31 56 7 0 0 0
ODI 0 32 25 132 59 1 0 0
CDI 0 5 10 104 306 40 14 4
VCDI 0 0 13 69 526 603 2830 1113

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5830 2897 15 8 0 0 0 0
OW 0 597 114 66 0 0 0 0
VODI 0 90 65 302 43 0 0 0
ODI 0 11 8 104 185 15 0 0
CDI 0 7 1 31 256 263 19 0
VCDI 0 9 5 18 79 125 159 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5830 2885 24 12 0 0 0 0
OW 0 411 66 64 0 0 0 0
VODI 0 225 72 228 33 1 0 0
ODI 0 46 14 128 122 20 0 0
CDI 0 22 17 68 317 267 31 0
VCDI 0 22 15 29 91 115 147 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 5265 2784 61 61 8 0 0 0
OW 0 161 87 129 47 3 0 0
VODI 0 6 17 209 142 8 0 0
ODI 0 0 0 37 147 46 0 0
CDI 0 0 0 7 103 237 2 0
VCDI 0 0 0 0 17 1377 735 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5265 2731 64 68 11 0 0 0
OW 0 162 60 91 39 0 0 0
VODI 0 51 32 157 87 15 0 0
ODI 0 7 9 88 107 33 0 0
CDI 0 0 0 39 196 208 6 0
VCDI 0 0 0 0 24 1415 731 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 7701 3172 56 17 0 0 0 0
OW 0 81 121 173 8 0 0 0
VODI 0 1 9 238 77 2 0 0
ODI 0 0 0 62 211 24 0 0
CDI 0 0 0 7 186 314 40 0
VCDI 0 0 0 0 30 191 266 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7701 3090 58 16 0 0 0 0
OW 0 136 75 135 11 0 0 0
VODI 0 27 46 205 87 4 0 0
ODI 0 1 7 95 156 57 9 0
CDI 0 0 0 45 223 277 186 0
VCDI 0 0 0 1 35 193 111 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 0 0 0 0 2 0 0
OW 0 0 0 0 0 10 0 0
VODI 0 0 0 0 10 4 0 0
ODI 0 0 0 0 32 14 0 0
CDI 0 0 0 0 29 170 57 0
VCDI 0 0 0 0 8 267 2954 2246
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 6 0 0
OW 0 0 0 0 0 9 0 0
VODI 0 0 0 0 0 6 0 0
ODI 0 0 0 0 13 10 6 0
CDI 0 0 0 0 46 118 62 0
VCDI 0 0 0 0 20 318 2943 2246

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 0 0 0 0 0
ODI 0 0 0 0 0 0 0 1
CDI 0 0 0 0 0 11 7 13
VCDI 0 0 0 0 0 145 1941 6420
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 3
CDI 0 0 0 0 0 11 21 14
VCDI 0 0 0 0 0 145 1927 6417

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6496 4119 70 216 10 0 0 0
OW 0 399 130 205 27 0 0 0
VODI 0 48 52 428 188 1 0 0
ODI 0 2 5 102 324 146 0 0
CDI 0 0 0 38 171 548 10 0
VCDI 0 0 0 10 82 794 1075 50
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6496 4004 96 295 4 0 0 0
OW 0 326 65 123 35 0 0 0
VODI 0 172 54 258 131 16 0 0
ODI 0 49 24 185 291 151 0 0
CDI 0 14 9 68 170 383 1 0
VCDI 0 3 9 70 171 939 1084 50


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