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: 2025-02-13

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: 2025-02-17

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 71 29 8 0 0 0 0
OW 0 20 17 69 6 0 0 0
VODI 0 1 6 108 68 1 9 0
ODI 0 0 0 2 146 48 29 0
CDI 0 0 0 0 47 317 132 0
VCDI 0 0 0 0 3 385 7931 27449
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 66 29 10 0 0 0 0
OW 0 21 19 70 4 0 0 0
VODI 0 5 4 83 57 6 0 0
ODI 0 0 0 24 107 39 0 0
CDI 0 0 0 0 100 458 555 0
VCDI 0 0 0 0 2 248 7546 27449

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 3 3
VCDI 0 0 0 0 0 0 444 2669
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 0 447 2672

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 2 11
VCDI 0 0 0 0 0 14 993 8958
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 20
VCDI 0 0 0 0 0 14 992 8949

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 0 0 0
VCDI 0 0 0 0 0 154 2180 3319
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 0 154 2180 3319

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 0
VCDI 0 0 0 0 0 14 812 6398
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 14 812 6398

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 0 6
VCDI 0 0 0 0 0 0 0 5293
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 0 5295

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 81 2 0 0 0 0 0
OW 0 35 26 8 0 0 0 0
VODI 0 0 2 57 6 0 0 0
ODI 0 0 0 25 24 0 0 0
CDI 0 0 0 17 64 64 18 4
VCDI 0 0 0 0 49 320 3670 1845
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 69 3 0 0 0 0 0
OW 0 37 12 5 0 0 0 0
VODI 0 10 15 21 0 1 7 0
ODI 0 0 0 31 0 6 43 0
CDI 0 0 0 35 50 35 46 6
VCDI 0 0 0 15 93 342 3592 1843

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3622 4070 109 82 0 0 0 0
OW 0 138 74 211 13 0 0 0
VODI 0 17 18 355 139 4 0 0
ODI 0 0 1 62 493 41 4 0
CDI 0 0 0 9 286 396 39 0
VCDI 0 0 0 0 30 550 559 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3622 4081 131 173 0 0 0 0
OW 0 107 50 272 44 0 0 0
VODI 0 35 14 167 255 3 0 0
ODI 0 2 7 80 277 29 0 0
CDI 0 0 0 27 313 304 17 0
VCDI 0 0 0 0 72 655 585 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 4578 3285 65 69 2 0 0 0
OW 0 123 94 121 39 0 0 0
VODI 0 4 16 178 126 6 0 0
ODI 0 0 0 23 128 68 0 0
CDI 0 0 0 0 46 244 38 0
VCDI 0 0 0 0 21 286 2136 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4578 3227 81 85 21 0 0 0
OW 0 155 60 107 42 0 0 0
VODI 0 30 32 118 67 18 0 0
ODI 0 0 2 59 83 48 0 0
CDI 0 0 0 22 109 238 30 0
VCDI 0 0 0 0 40 300 2144 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 8002 3161 153 209 2 0 0 0
OW 0 22 62 185 23 0 0 0
VODI 0 0 0 171 58 3 0 0
ODI 0 0 0 40 101 17 0 0
CDI 0 0 0 3 127 72 1 0
VCDI 0 0 0 0 28 323 224 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8002 3153 150 198 3 0 0 0
OW 0 29 54 166 31 0 0 0
VODI 0 1 11 155 49 11 0 0
ODI 0 0 0 79 53 25 0 0
CDI 0 0 0 10 141 79 10 0
VCDI 0 0 0 0 62 300 215 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 3 0 0 0 0 0 0
OW 0 67 6 8 0 0 0 0
VODI 0 17 8 39 5 0 0 0
ODI 0 3 7 33 34 2 1 0
CDI 0 1 4 54 88 96 30 0
VCDI 0 0 0 1 91 628 3080 1497
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 9 1 0 0 0 0 0
OW 0 21 6 11 0 0 0 0
VODI 0 12 1 23 14 0 0 0
ODI 0 33 0 19 16 6 0 0
CDI 0 16 17 66 59 59 46 3
VCDI 0 0 0 16 129 661 3065 1494

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 17 0 0 0
ODI 0 0 0 0 15 1 0 0
CDI 0 0 0 0 32 30 13 5
VCDI 0 0 0 0 27 834 3006 4558
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 14 0 0 0
ODI 0 0 0 0 14 1 0 0
CDI 0 0 0 0 27 26 27 5
VCDI 0 0 0 0 36 838 2992 4558

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7439 3967 19 39 27 0 0 0
OW 23 723 122 75 7 0 0 0
VODI 0 42 55 229 49 0 0 0
ODI 0 25 25 101 206 29 0 0
CDI 0 1 10 136 144 269 24 0
VCDI 0 0 1 33 190 865 871 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7462 3780 23 28 18 0 0 0
OW 0 519 26 70 15 0 0 0
VODI 0 262 39 41 0 0 0 0
ODI 0 127 78 127 27 1 0 0
CDI 0 58 45 175 238 163 5 0
VCDI 0 12 21 172 325 999 890 0


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