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: 2025-01-02

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: 2025-01-06

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 52 26 17 0 0 0 0
OW 0 7 3 61 9 0 0 0
VODI 0 0 2 23 46 3 0 0
ODI 0 0 0 2 81 33 0 0
CDI 0 0 0 0 164 262 21 0
VCDI 0 0 0 0 83 430 6196 29381
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 50 26 33 0 0 0 0
OW 0 8 5 39 19 0 0 0
VODI 0 1 0 23 40 4 0 0
ODI 0 0 0 5 79 37 0 0
CDI 0 0 0 3 113 228 16 0
VCDI 0 0 0 0 132 459 6201 29381

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 1 509 2609
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 1 509 2609

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 13
VCDI 0 0 0 0 0 0 205 9760
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 0 205 9767

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 19 638 1787 3209
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 5 0 0
VCDI 0 0 0 0 19 633 1787 3209

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 0 0 7224
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 0 7224

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 2 5 2
VCDI 0 0 0 0 0 16 1484 3790
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 16 7
VCDI 0 0 0 0 0 16 1473 3785

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 2 356 14 7 0 0 0 0
OW 0 71 57 37 1 0 0 0
VODI 0 26 7 103 18 0 0 0
ODI 0 5 0 54 62 0 0 0
CDI 0 9 13 36 111 82 5 0
VCDI 0 0 1 46 156 791 2892 1355
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 2 332 28 38 2 0 0 0
OW 0 59 34 61 27 0 0 0
VODI 0 36 13 86 51 5 0 0
ODI 0 30 3 36 55 29 0 0
CDI 0 10 8 21 77 246 21 3
VCDI 0 0 6 41 136 593 2876 1352

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5726 3060 92 87 1 0 0 0
OW 0 122 43 155 12 0 0 0
VODI 0 37 28 175 120 0 0 0
ODI 0 0 4 38 217 30 0 0
CDI 0 0 1 69 109 452 92 0
VCDI 0 0 0 14 79 221 338 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5724 3105 106 177 12 0 0 0
OW 2 61 22 97 44 0 0 0
VODI 0 26 18 117 129 5 0 0
ODI 0 27 21 42 117 78 20 0
CDI 0 0 1 68 144 446 237 0
VCDI 0 0 0 37 92 174 173 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 5718 2896 23 6 0 0 0 0
OW 0 226 106 108 12 0 0 0
VODI 0 10 24 113 47 0 0 0
ODI 0 4 7 30 65 5 0 0
CDI 0 0 4 66 133 118 10 0
VCDI 0 0 0 2 70 321 1498 74
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5718 2643 7 0 0 0 0 0
OW 0 369 66 37 0 0 0 0
VODI 0 91 43 103 15 0 0 0
ODI 0 26 34 59 44 0 0 0
CDI 0 7 13 91 153 100 0 0
VCDI 0 0 1 35 115 344 1508 74

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7892 3016 59 33 3 0 0 0
OW 0 143 108 163 33 0 0 0
VODI 0 1 17 162 80 5 0 0
ODI 0 0 0 40 140 35 0 0
CDI 0 0 0 6 78 216 74 0
VCDI 0 0 0 0 12 141 530 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7892 2972 52 51 3 0 0 0
OW 0 156 72 108 43 3 0 0
VODI 0 29 54 117 77 11 0 0
ODI 0 3 6 110 82 93 48 0
CDI 0 0 0 18 128 177 313 0
VCDI 0 0 0 0 13 113 243 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 71 0 0 4 0 0 0
OW 0 75 14 25 7 0 0 0
VODI 0 4 12 62 49 0 0 0
ODI 0 0 0 47 130 5 0 0
CDI 0 0 0 0 115 226 43 0
VCDI 0 0 0 0 7 117 2659 2131
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 68 0 4 13 0 0 0
OW 0 50 3 47 48 3 0 0
VODI 0 31 12 23 89 17 0 0
ODI 0 1 11 29 85 85 0 0
CDI 0 0 0 30 71 196 318 14
VCDI 0 0 0 1 6 47 2384 2117

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 191 1101 107 116 9 0 0 0
OW 0 81 67 207 115 7 0 0
VODI 0 35 8 373 218 56 0 0
ODI 0 3 0 37 128 111 0 0
CDI 0 0 0 15 30 402 65 0
VCDI 0 0 0 11 56 954 4024 11
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 191 1104 153 371 199 73 0 0
OW 0 54 11 53 151 117 2 0
VODI 0 42 16 155 94 111 52 0
ODI 0 18 2 103 30 102 78 0
CDI 0 2 0 67 21 153 98 0
VCDI 0 0 0 10 61 974 3859 11

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11483 2764 45 16 0 0 0 0
OW 42 227 31 39 0 0 0 0
VODI 1 32 9 156 43 0 0 0
ODI 0 12 0 56 33 0 0 0
CDI 0 14 0 29 51 38 1 0
VCDI 0 0 1 9 69 102 407 36
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11505 2864 62 55 0 0 0 0
OW 21 125 22 117 42 0 0 0
VODI 0 47 1 88 43 14 0 0
ODI 0 8 0 36 24 19 5 0
CDI 0 5 1 7 50 27 36 0
VCDI 0 0 0 2 37 80 367 36


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