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: 2023-12-28

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: 2024-01-01

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 0 0 0 0 0 0
OW 0 55 11 0 0 0 0 0
VODI 0 27 11 13 0 0 0 0
ODI 0 16 3 15 2 0 0 0
CDI 0 7 28 88 79 17 0 0
VCDI 0 0 0 40 124 485 5414 30396
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 58 0 0 0 0 0 0
OW 0 43 4 0 0 0 0 0
VODI 0 20 9 4 0 0 0 0
ODI 0 22 7 16 2 0 0 0
CDI 0 31 20 43 48 15 1 0
VCDI 0 2 13 93 155 487 5413 30396

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 39 660 2420
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 39 660 2420

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 0
VCDI 0 0 0 0 0 2 758 9217
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 0
VCDI 0 0 0 0 0 2 758 9217

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 18 558 2500 2577
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 1 1 0 0
VCDI 0 0 0 0 17 557 2500 2577

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 0 7223
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 0 7223

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 0
VCDI 0 0 0 0 0 0 0 5299
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 5299

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 78 0 0 0 0 0 0
OW 0 53 0 2 0 0 0 0
VODI 0 8 0 19 7 0 0 0
ODI 0 2 0 24 27 1 0 0
CDI 0 0 0 32 115 189 0 0
VCDI 0 0 0 4 160 1258 3060 1278
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 57 0 0 0 0 0 0
OW 0 53 0 0 0 0 0 0
VODI 0 21 0 3 0 0 0 0
ODI 0 8 0 20 7 0 0 0
CDI 0 2 0 51 85 70 3 0
VCDI 0 0 0 7 217 1378 3057 1278

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5159 3122 32 3 0 0 0 0
OW 0 615 66 44 0 0 0 0
VODI 0 123 19 202 23 0 0 0
ODI 0 36 18 66 123 6 0 0
CDI 0 43 41 118 112 94 0 0
VCDI 0 0 4 81 213 374 585 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5155 2874 22 1 0 0 0 0
OW 4 448 37 26 0 0 0 0
VODI 0 322 30 97 28 0 0 0
ODI 0 129 19 99 85 4 0 0
CDI 0 103 12 106 100 73 0 0
VCDI 0 63 60 185 258 397 585 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 4962 2611 29 54 0 0 0 0
OW 0 147 50 87 15 0 0 0
VODI 0 8 39 152 80 0 0 0
ODI 0 1 3 70 170 12 0 0
CDI 0 0 0 38 226 422 14 0
VCDI 0 0 0 0 38 943 1525 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4962 2532 29 90 5 0 0 0
OW 0 151 34 72 48 0 0 0
VODI 0 60 30 84 89 0 0 0
ODI 0 23 17 63 81 24 0 0
CDI 0 1 11 91 233 331 26 0
VCDI 0 0 0 1 73 1022 1513 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 7683 3318 88 179 12 0 0 0
OW 0 27 42 115 75 0 0 0
VODI 0 0 2 117 116 8 0 0
ODI 0 0 0 32 119 28 0 0
CDI 0 0 0 9 128 287 11 0
VCDI 0 0 0 0 13 163 415 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7683 3299 76 150 11 0 0 0
OW 0 44 39 121 64 0 0 0
VODI 0 2 17 102 110 6 0 0
ODI 0 0 0 53 92 30 0 0
CDI 0 0 0 26 153 252 23 0
VCDI 0 0 0 0 33 198 403 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 11 434 8 0 0 0 0 0
OW 1 193 35 18 0 0 0 0
VODI 0 14 25 83 9 0 0 0
ODI 0 0 16 41 39 1 0 0
CDI 0 0 0 99 183 190 6 0
VCDI 0 0 0 14 213 606 2587 977
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11 391 2 0 0 0 0 0
OW 1 106 15 6 0 0 0 0
VODI 0 74 5 17 0 0 0 0
ODI 0 42 19 52 0 1 0 0
CDI 0 28 35 58 138 141 93 0
VCDI 0 0 8 122 306 655 2500 977

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 65 4 1 0 0 0 0
OW 0 201 24 18 0 0 0 0
VODI 0 11 13 50 9 5 0 0
ODI 0 0 1 4 114 37 0 0
CDI 0 0 0 0 202 946 25 0
VCDI 0 0 0 0 20 2051 4292 445
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 35 4 0 0 0 0 0
OW 0 112 13 34 1 0 0 0
VODI 0 120 22 39 106 17 0 0
ODI 0 9 3 0 92 206 24 0
CDI 0 1 0 0 71 729 355 0
VCDI 0 0 0 0 75 2087 3938 445

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11596 1836 5 1 0 0 0 0
OW 146 246 41 18 11 0 0 0
VODI 3 66 20 327 77 0 0 0
ODI 0 19 3 194 176 8 0 0
CDI 0 3 4 40 217 235 34 0
VCDI 0 0 0 0 20 192 208 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11600 1798 18 0 0 0 0 0
OW 143 131 24 52 26 0 0 0
VODI 2 115 20 167 71 0 0 0
ODI 0 83 2 164 99 3 0 0
CDI 0 43 9 175 261 182 78 0
VCDI 0 0 0 22 44 250 164 0


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