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: 2021-04-15

Model: ARC MFC - TOPAZ

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

Model vs. observations, sea ice class contingency tables

Date: 2021-04-19

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 0 174 8 54 34 4 0 0
OW 0 3 1 13 27 5 0 0
VODI 0 0 0 4 31 21 0 0
ODI 0 0 0 0 18 37 0 0
CDI 0 0 0 0 7 69 35 0
VCDI 0 0 0 0 60 939 3436 31922
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 174 8 56 43 7 0 0
OW 0 3 1 11 28 10 0 0
VODI 0 0 0 4 28 33 0 0
ODI 0 0 0 0 11 42 6 0
CDI 0 0 0 0 6 46 60 1
VCDI 0 0 0 0 61 937 3405 31921

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 50 267 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 0 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 50 267 2816

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 8
VCDI 0 0 0 0 0 0 0 9974
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 65
VCDI 0 0 0 0 0 0 0 9917

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 4 2 9 0
ODI 0 0 0 0 36 7 13 0
CDI 0 0 0 0 56 80 27 0
VCDI 0 0 0 0 0 145 2535 2740
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 1 6 0
VODI 0 0 0 0 16 3 19 0
ODI 0 0 0 0 34 14 19 0
CDI 0 0 0 0 37 86 84 0
VCDI 0 0 0 0 9 130 2456 2740

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 4 3
CDI 0 0 0 0 0 17 32 105
VCDI 0 0 0 0 0 46 3085 3954
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 19 44
CDI 0 0 0 0 0 35 132 183
VCDI 0 0 0 0 0 27 2970 3835

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 5 0 0
VCDI 0 0 0 0 0 115 1949 3257
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 14 2 13
VCDI 0 0 0 0 0 106 1947 3244

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 17 0 0 0 0
VODI 0 0 0 37 7 0 0 0
ODI 0 0 0 13 52 6 0 0
CDI 0 0 0 16 63 169 29 0
VCDI 0 0 0 75 188 581 3575 1503
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 10 7 0 0 0
CDI 0 0 0 40 65 138 18 0
VCDI 0 0 0 108 237 618 3586 1503

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3599 4323 57 361 54 0 0 0
OW 0 135 48 339 75 7 0 0
VODI 0 2 5 278 236 6 0 0
ODI 0 0 0 50 315 19 0 0
CDI 0 0 0 21 273 267 12 0
VCDI 0 0 0 0 129 602 118 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3599 4111 58 419 127 12 0 0
OW 0 214 27 167 73 0 0 0
VODI 0 134 22 213 106 5 0 0
ODI 0 1 3 139 145 12 0 0
CDI 0 0 0 76 306 109 9 0
VCDI 0 0 0 35 325 763 121 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 6100 2896 3 2 0 0 0 0
OW 0 138 10 31 1 0 0 0
VODI 0 67 12 58 9 0 0 0
ODI 0 27 4 70 19 0 0 0
CDI 0 21 1 69 83 29 17 0
VCDI 0 0 0 43 238 739 1009 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6100 2661 1 0 0 0 0 0
OW 0 167 6 9 0 0 0 0
VODI 0 146 1 29 2 0 0 0
ODI 0 78 11 24 12 0 0 0
CDI 0 56 9 77 26 20 20 0
VCDI 0 41 2 134 310 748 1006 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 7652 3529 56 212 123 1 0 0
OW 0 44 14 102 23 0 0 0
VODI 0 1 6 86 72 4 0 0
ODI 0 0 0 25 108 33 0 0
CDI 0 0 0 1 116 150 40 0
VCDI 0 0 0 0 12 97 481 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7652 3487 53 239 131 0 0 0
OW 0 55 8 67 31 2 0 0
VODI 0 30 12 47 70 12 0 0
ODI 0 2 3 47 70 23 4 0
CDI 0 0 0 24 112 126 79 0
VCDI 0 0 0 2 40 122 438 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 24 2 0 0 0 0 0
OW 0 1 3 16 0 0 0 0
VODI 0 6 0 27 2 0 0 0
ODI 0 4 1 12 26 0 0 0
CDI 0 2 1 11 52 6 0 0
VCDI 0 0 0 12 98 790 3035 1672
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 12 0 0 0 0 0 0
OW 0 11 2 0 0 0 0 0
VODI 0 2 3 13 0 0 0 0
ODI 0 2 0 23 5 0 0 0
CDI 0 5 0 21 69 48 7 0
VCDI 0 5 2 21 104 748 3028 1672

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 29 3 0 0
ODI 0 0 0 0 67 19 1 0
CDI 0 0 0 0 213 396 43 0
VCDI 0 0 0 1 55 2311 5311 138
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 7 0 0 0
ODI 0 0 0 0 38 18 3 0
CDI 0 0 0 0 200 293 57 0
VCDI 0 0 0 1 119 2418 5295 138

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12526 3965 52 238 18 0 0 0
OW 0 22 17 273 78 0 0 0
VODI 0 0 0 71 340 1 0 0
ODI 0 0 0 2 402 120 0 0
CDI 0 0 0 0 353 378 22 0
VCDI 0 0 0 0 247 714 370 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12526 3955 54 437 91 0 0 0
OW 0 26 8 94 177 0 0 0
VODI 0 6 7 49 285 19 0 0
ODI 0 0 0 4 219 105 0 0
CDI 0 0 0 0 263 344 20 0
VCDI 0 0 0 0 403 745 372 0


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