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: 2023-04-13

Model: ARC-MFC PHYS (TOPAZ)

Data source: OSI SAF N.H. sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2023-04-17

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 0 0 4 9 0 0 0
OW 0 0 0 3 6 5 0 0
VODI 0 0 0 0 14 7 0 0
ODI 0 0 0 0 13 19 0 0
CDI 0 0 0 0 5 98 12 0
VCDI 0 0 0 6 72 556 3767 32306
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 4 14 6 0 0
OW 0 0 0 3 5 4 0 0
VODI 0 0 0 0 15 13 0 0
ODI 0 0 0 0 11 39 0 0
CDI 0 0 0 0 2 62 5 0
VCDI 0 0 0 6 72 561 3774 32306

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 7 0 3
VCDI 0 0 0 0 0 62 576 2485
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 8
VCDI 0 0 0 0 0 64 576 2480

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 8 0 1
VCDI 0 0 0 0 12 94 499 9368
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 12 102 499 9369

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 0 0 5654
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 5654

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 7245
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 7246

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 6 0
VCDI 0 0 0 0 0 10 895 4415
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 10 901 4414

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 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 2 5 0 0
CDI 0 0 0 0 10 6 0 0
VCDI 0 0 0 0 9 241 3242 2816
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 5 8 0 0
CDI 0 0 0 0 6 8 0 0
VCDI 0 0 0 0 10 236 3242 2816

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3351 3779 198 373 89 0 0 0
OW 0 78 43 157 100 2 0 0
VODI 0 48 17 147 178 13 0 0
ODI 0 9 3 52 225 54 0 0
CDI 0 3 2 21 240 287 0 0
VCDI 0 19 0 2 35 1482 324 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3351 3757 212 425 122 0 0 0
OW 0 79 14 107 103 5 0 0
VODI 0 58 27 107 147 18 0 0
ODI 0 21 7 69 159 34 0 0
CDI 0 18 3 35 245 130 0 0
VCDI 0 3 0 9 91 1651 324 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 4636 2964 121 184 7 0 0 0
OW 0 30 22 131 50 0 0 0
VODI 0 23 11 88 136 0 0 0
ODI 0 0 11 21 172 39 0 0
CDI 0 0 0 20 147 533 94 0
VCDI 0 0 0 0 52 1279 925 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4636 2971 125 191 20 0 0 0
OW 0 22 18 101 40 0 0 0
VODI 0 20 9 91 85 0 0 0
ODI 0 4 10 30 119 16 0 0
CDI 0 0 3 31 233 273 37 0
VCDI 0 0 0 0 67 1562 982 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 7751 3523 122 184 28 19 0 0
OW 0 25 32 123 42 9 2 0
VODI 0 0 5 61 110 6 0 0
ODI 0 0 0 17 110 47 0 0
CDI 0 0 0 0 35 304 31 0
VCDI 0 0 0 0 0 69 333 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7751 3522 108 199 51 24 0 0
OW 0 26 42 84 35 9 2 0
VODI 0 0 9 81 85 16 0 0
ODI 0 0 0 21 116 75 14 0
CDI 0 0 0 0 38 325 268 0
VCDI 0 0 0 0 0 5 82 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 17 17 2 0 0 0 0
OW 0 12 17 23 0 0 0 0
VODI 0 3 6 55 2 0 0 0
ODI 0 0 0 34 24 6 0 0
CDI 0 0 0 13 127 55 2 0
VCDI 0 0 0 11 457 937 2889 1094
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 6 6 0 0 0 0 0
OW 0 5 3 6 0 0 0 0
VODI 0 5 15 13 0 0 0 0
ODI 0 13 8 24 1 0 0 0
CDI 0 3 7 43 43 16 3 0
VCDI 0 0 1 52 566 982 2888 1094

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 0 0 0 0
ODI 0 0 0 0 3 0 0 0
CDI 0 0 0 0 23 25 18 24
VCDI 0 0 0 0 52 239 2097 6106
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 18 14 7 16
VCDI 0 0 0 0 60 250 2108 6114

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10129 5524 266 485 140 2 0 0
OW 0 2 9 206 97 16 4 0
VODI 0 0 0 84 223 31 10 0
ODI 0 0 0 0 183 109 29 0
CDI 0 0 0 0 57 520 85 0
VCDI 0 0 0 0 9 365 1477 147
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10129 5526 273 582 212 32 11 0
OW 0 0 2 157 107 28 8 0
VODI 0 0 0 35 200 54 21 0
ODI 0 0 0 1 124 114 30 0
CDI 0 0 0 0 55 389 110 0
VCDI 0 0 0 0 11 426 1425 147


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