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: 2025-01-30

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: 2025-02-03

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 0 284 0 1 0 0 0 0
OW 0 197 13 4 2 0 0 0
VODI 0 66 18 54 37 0 0 0
ODI 0 29 21 38 44 0 0 0
CDI 0 12 29 117 284 197 9 0
VCDI 0 0 0 76 469 1204 7153 26544
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 265 0 0 0 0 0 0
OW 0 93 2 1 0 0 0 0
VODI 0 64 7 7 7 0 0 0
ODI 0 52 14 35 35 0 0 0
CDI 0 78 21 69 149 97 2 0
VCDI 0 36 37 178 645 1304 7160 26544

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 26 299 2794
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 26 299 2794

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 9 836 9133
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 9 836 9133

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 3 0 0
CDI 0 0 0 0 0 16 0 0
VCDI 0 0 0 0 0 432 2071 3131
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 0 0
VCDI 0 0 0 0 0 444 2071 3131

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 4
VCDI 0 0 0 0 0 0 390 6830
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 0 390 6834

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 0 3 0
VCDI 0 0 0 0 21 250 1668 3357
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 4 0
VCDI 0 0 0 0 21 250 1667 3357

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 150 1 0 0 0 0 0
OW 0 147 13 6 0 0 0 0
VODI 0 24 24 20 1 0 0 0
ODI 0 2 6 44 6 2 0 0
CDI 0 0 1 41 55 30 11 9
VCDI 0 0 0 5 94 313 3125 2187
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 122 0 0 0 0 0 0
OW 0 70 1 0 0 0 0 0
VODI 0 81 14 6 0 0 0 0
ODI 0 36 15 14 3 3 23 0
CDI 0 14 15 63 18 16 110 3
VCDI 0 0 0 33 135 326 3003 2193

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5267 3230 25 5 0 0 0 0
OW 0 795 58 41 0 0 0 0
VODI 0 118 64 149 24 0 0 0
ODI 0 17 22 108 159 7 0 0
CDI 0 4 8 85 324 210 2 0
VCDI 0 0 0 15 92 298 195 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5266 3062 26 11 0 0 0 0
OW 1 442 22 37 4 0 0 0
VODI 0 375 40 101 69 0 0 0
ODI 0 176 19 60 122 7 0 0
CDI 0 103 54 104 201 109 0 0
VCDI 0 6 16 90 203 399 197 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 5940 2586 31 28 0 0 0 0
OW 0 265 55 85 14 0 0 0
VODI 0 22 27 105 62 1 0 0
ODI 0 4 6 69 92 19 0 0
CDI 0 0 2 34 223 558 33 0
VCDI 0 0 0 0 15 985 435 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5940 2558 29 23 0 0 0 0
OW 0 165 27 44 4 0 0 0
VODI 0 109 28 76 39 0 0 0
ODI 0 37 24 82 70 32 2 0
CDI 0 8 13 87 211 323 32 0
VCDI 0 0 0 9 82 1208 434 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 8033 3123 94 72 2 0 0 0
OW 0 115 83 224 30 0 0 0
VODI 0 0 5 191 102 16 0 0
ODI 0 0 0 33 136 37 0 0
CDI 0 0 0 4 116 118 11 0
VCDI 0 0 0 0 33 189 220 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8033 3005 81 90 7 0 0 0
OW 0 168 51 140 22 4 0 0
VODI 0 65 44 154 61 29 0 0
ODI 0 0 6 102 98 21 2 0
CDI 0 0 0 37 175 130 95 0
VCDI 0 0 0 1 56 176 134 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 6 0 0 7 11 0 0
OW 0 14 8 8 1 7 0 0
VODI 0 0 4 43 8 10 0 0
ODI 0 0 0 8 36 28 3 0
CDI 0 0 0 0 48 155 45 4
VCDI 0 0 0 0 47 492 2699 2111
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 8 0 0 8 13 0 0
OW 0 10 9 1 0 12 0 0
VODI 0 2 3 23 0 18 2 0
ODI 0 0 0 24 8 29 6 0
CDI 0 0 0 11 57 82 34 4
VCDI 0 0 0 0 74 549 2705 2111

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 3 0 0 0
ODI 0 0 0 0 24 3 0 0
CDI 0 0 0 0 27 78 0 1
VCDI 0 0 0 0 37 1047 3262 4056
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 1 2 0 0
CDI 0 0 0 0 25 52 0 0
VCDI 0 0 0 0 65 1074 3262 4057

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7873 3632 25 27 0 0 0 0
OW 29 307 148 247 42 0 0 0
VODI 0 30 51 552 177 0 0 0
ODI 0 2 1 134 393 36 0 0
CDI 0 0 0 9 296 334 3 0
VCDI 0 0 0 0 40 779 579 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7892 3560 39 25 0 0 0 0
OW 9 341 120 327 39 0 0 0
VODI 1 51 45 387 145 0 0 0
ODI 0 15 10 149 328 29 0 0
CDI 0 4 11 79 296 127 0 0
VCDI 0 0 0 2 140 993 582 0


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