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: 2021-05-06

Model: ARC MFC - TOPAZ

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

Model vs. observations, sea ice class contingency tables

Date: 2021-05-10

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 12 3 41 75 61 0 0
OW 0 0 0 5 7 39 0 0
VODI 0 0 0 1 6 43 6 0
ODI 0 0 0 4 4 43 5 0
CDI 0 0 0 14 0 58 111 0
VCDI 0 0 0 11 55 441 4813 31044
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 12 3 41 77 91 0 0
OW 0 0 0 5 6 39 1 0
VODI 0 0 0 0 6 45 12 0
ODI 0 0 0 0 3 31 48 0
CDI 0 0 0 4 0 50 122 0
VCDI 0 0 0 26 55 429 4752 31044

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 1 0 0
VCDI 0 0 0 0 0 241 528 2363
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 11 6 0
VCDI 0 0 0 0 0 231 522 2363

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 28 12 0
VCDI 0 0 0 0 17 209 2736 6980
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 1 0 0
CDI 0 0 0 0 0 22 13 0
VCDI 0 0 0 0 17 214 2735 6980

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 5 8 0 0 0
VODI 0 0 0 18 18 0 0 0
ODI 0 0 0 12 15 3 0 0
CDI 0 0 0 18 77 59 1 0
VCDI 0 0 0 8 112 302 2858 2140
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 3 0 0 0
VODI 0 0 0 12 18 0 0 0
ODI 0 0 0 13 16 3 2 0
CDI 0 0 0 18 60 60 44 0
VCDI 0 0 0 18 133 301 2813 2140

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 3 0
CDI 0 0 0 0 0 12 43 0
VCDI 0 0 0 0 0 145 2840 4203
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 2 0
CDI 0 0 0 0 0 18 63 0
VCDI 0 0 0 0 0 139 2821 4203

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 1 0 0
CDI 0 0 0 0 0 12 11 7
VCDI 0 0 0 0 89 544 3149 1513
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 1 3 0
CDI 0 0 0 0 0 14 39 19
VCDI 0 0 0 0 89 542 3118 1501

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 135 0 0 0 0 0 0
OW 0 16 2 56 16 0 0 0
VODI 0 19 3 153 32 7 0 0
ODI 0 12 3 58 188 21 0 0
CDI 0 1 4 51 487 254 35 0
VCDI 0 0 0 1 132 2112 2527 6
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 16 0 15 6 0 0 0
OW 0 44 1 46 7 0 0 0
VODI 0 73 2 84 21 5 0 0
ODI 0 28 2 77 88 15 1 0
CDI 0 21 4 57 398 173 167 0
VCDI 0 1 3 40 335 2201 2394 6

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4653 3782 42 250 49 0 0 0
OW 0 95 22 148 38 0 0 0
VODI 0 13 5 185 225 0 0 0
ODI 0 1 2 35 303 16 0 0
CDI 0 0 0 7 232 383 7 0
VCDI 0 0 0 4 119 418 297 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4653 3718 41 256 55 0 0 0
OW 0 120 16 119 63 0 0 0
VODI 0 44 10 140 174 2 0 0
ODI 0 8 4 73 233 14 0 0
CDI 0 1 0 31 216 144 0 0
VCDI 0 0 0 10 225 657 304 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 5288 3326 21 90 23 0 0 0
OW 0 117 14 58 16 1 0 0
VODI 0 28 9 150 38 2 0 0
ODI 0 0 0 75 126 15 0 0
CDI 0 0 0 6 220 543 83 0
VCDI 0 0 0 0 28 442 976 1
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5288 3308 24 96 35 0 0 0
OW 0 110 10 58 35 2 0 0
VODI 0 53 10 106 26 24 0 0
ODI 0 0 0 93 88 49 0 0
CDI 0 0 0 26 224 425 80 0
VCDI 0 0 0 0 43 503 979 1

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7812 3347 45 184 98 1 0 0
OW 0 34 19 121 15 3 0 0
VODI 0 0 2 84 113 5 0 0
ODI 0 0 0 0 192 14 1 0
CDI 0 0 0 0 140 457 112 0
VCDI 0 0 0 0 0 10 179 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7812 3372 57 260 110 3 0 0
OW 0 9 9 101 71 6 0 0
VODI 0 0 0 28 148 23 0 0
ODI 0 0 0 0 113 92 9 0
CDI 0 0 0 0 116 366 281 0
VCDI 0 0 0 0 0 0 2 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 0 143 8 13 0 0 0 0
OW 0 32 5 30 0 0 0 0
VODI 0 6 5 70 11 0 0 0
ODI 0 5 1 46 88 0 0 0
CDI 0 2 0 31 232 506 17 0
VCDI 0 0 0 5 89 1487 2924 47
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 143 7 24 0 0 0 0
OW 0 26 6 21 0 0 0 0
VODI 0 12 5 43 9 0 0 0
ODI 0 0 0 56 57 0 0 0
CDI 0 7 1 27 249 388 17 0
VCDI 0 0 0 24 105 1605 2924 47

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 4 0 0 0
OW 0 0 0 15 22 0 0 0
VODI 0 0 0 39 123 6 0 0
ODI 0 0 0 34 246 33 8 0
CDI 0 0 0 19 388 525 134 0
VCDI 0 0 0 0 199 910 4751 1131
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 2 0 0 0
OW 0 0 0 2 28 0 0 0
VODI 0 0 0 21 121 34 8 0
ODI 0 0 0 20 145 58 33 0
CDI 0 0 0 64 342 367 385 11
VCDI 0 0 0 0 344 1015 4467 1120

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13499 4835 56 209 82 1 0 0
OW 0 35 12 132 62 7 0 0
VODI 0 5 1 67 157 16 0 0
ODI 0 0 0 4 203 30 0 0
CDI 0 0 0 0 63 492 155 0
VCDI 0 0 0 0 0 1 85 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13499 4829 63 287 93 0 0 0
OW 0 38 3 90 133 13 0 0
VODI 0 8 3 29 178 28 0 0
ODI 0 0 0 6 105 77 2 0
CDI 0 0 0 0 58 418 200 0
VCDI 0 0 0 0 0 11 38 0


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