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: 2021-04-22

Model: ARC MFC - TOPAZ

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

Model vs. observations, sea ice class contingency tables

Date: 2021-04-26

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 24 4 74 99 33 0 0
OW 0 0 0 0 25 27 0 0
VODI 0 0 0 0 20 45 0 0
ODI 0 0 0 0 26 57 5 0
CDI 0 0 0 0 5 81 50 0
VCDI 0 0 0 0 0 710 4055 31562
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 24 4 74 108 45 0 0
OW 0 0 0 0 24 41 0 0
VODI 0 0 0 0 18 54 0 0
ODI 0 0 0 0 20 48 16 0
CDI 0 0 0 0 5 76 73 0
VCDI 0 0 0 0 0 689 4021 31562

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 59 296 2778
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 59 296 2778

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 1 8 9
VCDI 0 0 0 0 0 7 680 9277
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 11
VCDI 0 0 0 0 0 8 685 9275

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 2 7 0 0
ODI 0 0 0 0 26 11 1 0
CDI 0 0 0 0 78 56 33 5
VCDI 0 0 0 0 6 116 1879 3434
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 1 8 0 0
VODI 0 0 0 0 3 15 2 0
ODI 0 0 0 0 20 10 17 0
CDI 0 0 0 0 73 71 60 21
VCDI 0 0 0 0 15 86 1834 3418

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 22 67 0
VCDI 0 0 0 0 0 230 3989 2938
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 24 75 15
VCDI 0 0 0 0 0 228 3981 2923

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 1 1 0
VCDI 0 0 0 0 3 200 1861 3260
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 1 0
VCDI 0 0 0 0 3 200 1861 3260

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 3 0 0 0 0 0 0
OW 0 58 3 8 1 0 0 0
VODI 0 7 9 63 21 1 0 0
ODI 0 0 0 31 130 11 0 0
CDI 0 2 2 20 205 441 82 0
VCDI 0 3 5 61 146 787 2744 1487
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 2 0 0 0 0 0 0
OW 0 26 0 0 1 0 0 0
VODI 0 40 8 11 5 0 0 0
ODI 0 0 4 51 63 5 0 0
CDI 0 0 0 35 250 343 66 0
VCDI 0 5 7 86 184 892 2760 1487

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3399 4376 78 466 114 0 0 0
OW 0 89 24 244 168 1 0 0
VODI 0 3 2 185 251 4 0 0
ODI 0 0 0 12 368 30 5 0
CDI 0 0 0 0 204 503 66 0
VCDI 0 0 0 0 2 655 82 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3399 4313 73 522 250 2 0 0
OW 0 147 27 233 121 3 0 0
VODI 0 8 4 129 270 6 0 0
ODI 0 0 0 22 255 42 8 0
CDI 0 0 0 1 187 409 74 0
VCDI 0 0 0 0 24 731 71 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 5809 2948 17 32 0 0 0 0
OW 0 69 19 104 0 0 0 0
VODI 0 8 1 135 44 0 0 0
ODI 0 2 2 47 126 2 0 0
CDI 0 0 0 7 207 289 58 0
VCDI 0 0 0 0 10 317 1414 29
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5809 2870 20 44 0 0 0 0
OW 0 100 6 85 5 0 0 0
VODI 0 42 10 92 54 0 0 0
ODI 0 14 1 71 94 12 0 0
CDI 0 1 2 33 206 267 106 0
VCDI 0 0 0 0 28 329 1366 29

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7838 3394 38 139 122 26 0 0
OW 0 36 31 101 19 1 0 0
VODI 0 0 0 62 112 0 0 0
ODI 0 0 0 0 147 28 0 0
CDI 0 0 0 0 50 280 97 0
VCDI 0 0 0 0 0 9 458 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7838 3427 57 212 133 27 0 0
OW 0 3 12 68 75 0 0 0
VODI 0 0 0 22 137 23 0 0
ODI 0 0 0 0 89 100 9 0
CDI 0 0 0 0 16 193 504 0
VCDI 0 0 0 0 0 1 42 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 61 1 5 0 0 0 0
OW 0 17 5 27 0 0 0 0
VODI 0 1 2 49 14 0 0 0
ODI 0 0 0 7 49 0 0 0
CDI 0 0 0 5 60 160 43 0
VCDI 0 0 0 1 51 427 3787 1031
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 35 1 3 0 0 0 0
OW 0 22 5 17 0 0 0 0
VODI 0 14 1 38 4 0 0 0
ODI 0 7 0 13 39 0 0 0
CDI 0 1 1 16 61 140 225 0
VCDI 0 0 0 7 70 447 3605 1031

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 1 0 0 0
ODI 0 0 0 0 13 16 0 0
CDI 0 0 0 0 111 280 67 0
VCDI 0 0 0 0 30 1406 6417 246
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 4 5 0 0
CDI 0 0 0 0 48 121 73 0
VCDI 0 0 0 0 103 1576 6411 246

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12742 4250 43 219 25 0 0 0
OW 0 98 27 189 101 0 0 0
VODI 0 0 0 99 350 10 0 0
ODI 0 0 0 22 375 101 6 0
CDI 0 0 0 13 169 321 21 0
VCDI 0 0 0 0 180 490 358 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12742 4315 55 354 119 0 0 0
OW 0 32 15 88 190 19 0 0
VODI 0 1 0 55 197 59 10 0
ODI 0 0 0 14 208 79 5 0
CDI 0 0 0 19 183 198 9 0
VCDI 0 0 0 12 303 567 361 0


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