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: 2021-04-29

Model: ARC MFC - TOPAZ

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

Model vs. observations, sea ice class contingency tables

Date: 2021-05-03

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 46 86 84 6 0
OW 0 0 0 0 11 27 15 0
VODI 0 0 0 1 4 26 29 0
ODI 0 0 0 5 0 14 39 0
CDI 0 0 0 11 2 25 116 0
VCDI 0 0 0 13 55 257 3584 32446
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 46 93 96 17 0
OW 0 0 0 0 6 31 23 0
VODI 0 0 0 0 2 21 63 0
ODI 0 0 0 0 0 14 60 0
CDI 0 0 0 5 0 17 114 1
VCDI 0 0 0 25 57 254 3512 32445

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 53 437 2643
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 53 437 2643

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 7 5 0 0
ODI 0 0 0 0 17 4 9 0
CDI 0 0 0 0 51 87 17 9
VCDI 0 0 0 0 20 202 1796 7758
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 10 6 13 1
CDI 0 0 0 0 42 83 58 53
VCDI 0 0 0 0 43 209 1751 7713

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 40 1799 3815
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 40 1799 3815

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 9 59 0
VCDI 0 0 0 0 0 112 1544 5522
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 9 87 4
VCDI 0 0 0 0 0 112 1516 5518

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 4 0
VCDI 0 0 0 0 18 683 3211 1409
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 4 9 0
VCDI 0 0 0 0 18 680 3206 1409

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 7 0 0 0 0 0 0
OW 0 55 6 25 0 0 0 0
VODI 0 7 7 43 26 3 0 0
ODI 0 0 0 22 134 32 2 0
CDI 0 0 0 27 205 340 40 0
VCDI 0 0 0 40 157 1346 3785 22
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 19 4 8 0 0 0 0
VODI 0 27 2 46 26 3 0 0
ODI 0 17 1 5 84 26 4 0
CDI 0 6 6 20 216 178 61 0
VCDI 0 0 0 78 196 1514 3762 22

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3386 4432 80 350 39 0 0 0
OW 0 65 24 328 66 0 0 0
VODI 0 5 8 267 220 2 0 0
ODI 0 0 0 30 306 34 0 0
CDI 0 0 0 7 253 311 0 0
VCDI 0 0 0 3 125 858 132 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3386 4380 79 516 125 0 0 0
OW 0 100 24 207 53 0 0 0
VODI 0 21 6 186 171 6 0 0
ODI 0 1 3 49 202 41 0 0
CDI 0 0 0 17 232 158 0 0
VCDI 0 0 0 10 226 1000 132 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 5271 3426 17 59 14 0 0 0
OW 0 78 19 76 15 0 0 0
VODI 0 19 7 130 37 2 0 0
ODI 0 0 0 75 120 10 0 0
CDI 0 0 0 2 255 453 88 0
VCDI 0 0 0 0 19 431 1073 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5271 3414 21 70 17 0 0 0
OW 0 82 12 56 21 2 0 0
VODI 0 27 10 122 44 5 0 0
ODI 0 0 0 80 69 28 0 0
CDI 0 0 0 14 255 376 85 0
VCDI 0 0 0 0 54 485 1076 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 7730 3424 52 180 100 23 0 0
OW 0 12 14 133 25 0 0 0
VODI 0 0 2 70 116 2 0 0
ODI 0 0 0 2 208 31 0 0
CDI 0 0 0 0 135 317 155 0
VCDI 0 0 0 0 0 22 235 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7730 3430 62 256 118 23 0 0
OW 0 6 6 79 64 0 0 0
VODI 0 0 0 50 161 16 0 0
ODI 0 0 0 0 136 65 0 0
CDI 0 0 0 0 105 286 386 0
VCDI 0 0 0 0 0 5 4 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 0 134 3 12 0 0 0 0
OW 0 22 9 29 0 0 0 0
VODI 0 7 3 54 8 0 0 0
ODI 0 0 0 25 62 2 0 0
CDI 0 0 0 5 127 441 10 0
VCDI 0 0 0 15 78 969 3668 120
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 109 3 13 0 0 0 0
OW 0 27 7 20 0 0 0 0
VODI 0 22 3 39 0 0 0 0
ODI 0 5 2 25 43 2 0 0
CDI 0 0 0 21 124 422 7 0
VCDI 0 0 0 22 108 988 3671 120

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 3 0 0 0
VODI 0 0 0 0 43 6 0 0
ODI 0 0 0 0 106 35 21 0
CDI 0 0 0 22 332 224 80 15
VCDI 0 0 0 0 211 1225 4260 2004
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 1 0 0 0
OW 0 0 0 0 6 0 0 0
VODI 0 0 0 0 22 12 9 0
ODI 0 0 0 0 50 33 21 0
CDI 0 0 0 0 168 155 140 38
VCDI 0 0 0 22 448 1290 4191 1981

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 14182 3847 20 67 42 0 0 0
OW 0 280 32 168 58 0 0 0
VODI 0 95 19 163 137 9 0 0
ODI 0 2 3 39 160 41 0 0
CDI 0 0 0 3 81 174 3 0
VCDI 0 0 0 0 34 175 375 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 14182 3993 34 165 88 0 0 0
OW 0 157 18 108 77 5 0 0
VODI 0 64 11 108 101 28 0 0
ODI 0 10 11 41 91 31 0 0
CDI 0 0 0 18 96 110 0 0
VCDI 0 0 0 0 59 225 378 0


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