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 72 32 20 0 0 0 0
OW 0 18 17 72 9 0 0 0
VODI 0 2 3 74 54 6 0 0
ODI 0 0 0 20 102 39 0 0
CDI 0 0 0 1 99 415 397 0
VCDI 0 0 0 0 6 291 7704 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 8 2
VCDI 0 0 0 0 0 0 439 2670
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 1 12
VCDI 0 0 0 0 0 14 994 8957
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 4
VCDI 0 0 0 0 0 0 0 5295
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 75 5 0 0 0 0 0
OW 0 37 11 5 0 0 0 0
VODI 0 4 14 24 0 1 9 0
ODI 0 0 0 29 5 3 32 0
CDI 0 0 0 36 51 48 44 5
VCDI 0 0 0 13 87 332 3603 1844
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 4085 132 196 2 0 0 0
OW 0 101 52 267 32 0 0 0
VODI 0 30 10 126 249 2 0 0
ODI 0 9 6 89 256 19 0 0
CDI 0 0 2 40 335 289 19 0
VCDI 0 0 0 1 87 681 583 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 3248 78 99 15 0 0 0
OW 0 141 65 94 39 2 0 0
VODI 0 23 29 107 66 9 0 0
ODI 0 0 3 59 79 35 0 0
CDI 0 0 0 31 126 259 40 0
VCDI 0 0 0 1 37 299 2134 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 3163 150 205 3 0 0 0
OW 0 20 56 161 33 0 0 0
VODI 0 0 9 147 46 13 0 0
ODI 0 0 0 77 47 21 0 0
CDI 0 0 0 18 132 67 5 0
VCDI 0 0 0 0 78 314 220 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 10 1 2 0 0 0 0
OW 0 21 6 19 3 0 0 0
VODI 0 16 1 20 13 0 0 0
ODI 0 22 0 15 13 4 1 0
CDI 0 22 17 53 50 48 45 8
VCDI 0 0 0 26 139 674 3065 1489
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 14 1 0 0
ODI 0 0 0 0 15 1 0 0
CDI 0 0 0 0 27 20 17 6
VCDI 0 0 0 0 35 843 3002 4557
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 7462 3815 20 26 14 0 0 0
OW 0 507 32 67 19 0 0 0
VODI 0 230 37 43 0 0 0 0
ODI 0 132 71 140 34 3 0 0
CDI 0 48 44 170 230 168 4 0
VCDI 0 26 28 167 326 992 891 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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