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: 2021-04-01

Model: ARC MFC - TOPAZ

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

Model vs. observations, sea ice class contingency tables

Date: 2021-04-05

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 0 253 10 51 9 0 0 0
OW 0 14 2 31 26 0 0 0
VODI 0 5 1 20 37 3 0 0
ODI 0 0 0 3 47 10 0 0
CDI 0 0 0 2 52 38 0 0
VCDI 0 0 0 5 229 892 4566 30596
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 261 7 28 2 0 0 0
OW 0 11 6 37 11 0 0 0
VODI 0 0 0 28 32 1 0 0
ODI 0 0 0 7 38 4 0 0
CDI 0 0 0 5 41 21 1 0
VCDI 0 0 0 7 276 917 4565 30596

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 2 0
VCDI 0 0 0 0 0 125 1259 1747
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 2 0
VCDI 0 0 0 0 0 125 1259 1747

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 1
VCDI 0 0 0 0 0 0 37 9944
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 37 9945

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 9 781 4864
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 9 781 4864

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 3
VCDI 0 0 0 0 0 0 0 7243
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 0 0
VCDI 0 0 0 0 0 0 96 5230
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 96 5230

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 2 2 0 0 0
ODI 0 0 0 3 36 1 0 0
CDI 0 0 1 13 67 26 24 7
VCDI 0 4 0 74 230 258 3486 2097
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 4 8 1 0 0
CDI 0 0 0 4 52 31 34 11
VCDI 0 4 1 84 274 253 3476 2093

Barents Sea:

observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 3060 3594 36 186 38 0 0 0
OW 0 386 9 93 89 2 0 0
VODI 0 222 24 108 163 8 0 0
ODI 0 85 11 115 245 81 0 0
CDI 0 36 7 185 278 434 41 0
VCDI 0 45 8 123 331 445 843 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 3060 3586 35 204 76 5 0 0
OW 0 315 16 67 90 16 0 0
VODI 0 238 12 108 148 32 0 0
ODI 0 110 17 95 176 83 5 0
CDI 0 48 6 150 244 366 89 0
VCDI 0 71 9 186 410 468 790 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 5615 2974 8 14 0 0 0 0
OW 0 164 5 24 2 0 0 0
VODI 0 137 4 44 9 0 0 0
ODI 0 76 7 89 22 1 0 0
CDI 0 29 8 105 63 34 1 0
VCDI 0 0 2 91 387 899 882 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 5615 2707 8 19 1 0 0 0
OW 0 148 4 16 1 0 0 0
VODI 0 125 2 20 9 0 0 0
ODI 0 95 1 11 5 0 0 0
CDI 0 98 2 9 16 19 0 0
VCDI 0 207 17 292 451 915 883 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 7376 3461 52 270 125 6 0 0
OW 0 28 18 123 57 0 0 0
VODI 0 0 2 80 149 2 0 0
ODI 0 0 0 7 183 29 0 0
CDI 0 0 0 1 148 483 2 0
VCDI 0 0 0 0 0 302 84 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 7376 3473 60 342 160 6 0 0
OW 0 16 11 87 82 0 0 0
VODI 0 0 1 42 169 8 0 0
ODI 0 0 0 10 136 55 0 0
CDI 0 0 0 0 115 595 49 0
VCDI 0 0 0 0 0 158 37 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 15 4 3 0 0 0 0
OW 0 1 0 12 0 0 0 0
VODI 0 0 1 19 2 0 0 0
ODI 0 0 0 11 17 0 0 0
CDI 0 0 0 5 53 4 0 0
VCDI 0 0 0 21 78 419 3757 1381
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 12 2 2 0 0 0 0
OW 0 4 2 16 0 0 0 0
VODI 0 0 1 18 3 0 0 0
ODI 0 0 0 12 22 0 0 0
CDI 0 0 0 6 46 2 0 0
VCDI 0 0 0 17 79 421 3757 1381

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 0 17 0 0
CDI 0 0 0 0 24 237 45 33
VCDI 0 0 0 0 19 621 3971 3620
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 31 0 0
CDI 0 0 0 0 15 174 41 0
VCDI 0 0 0 0 28 670 3975 3653

Labrador Sea:

observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11110 4595 41 168 54 2 0 0
OW 0 210 30 217 79 12 0 0
VODI 0 65 17 366 257 62 2 0
ODI 0 0 0 27 194 121 9 0
CDI 0 0 0 2 142 270 79 0
VCDI 0 0 0 9 136 803 1130 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11110 4710 59 315 142 1 0 0
OW 0 160 28 306 120 26 0 0
VODI 0 0 1 151 220 94 7 0
ODI 0 0 0 7 146 154 28 0
CDI 0 0 0 0 82 220 106 0
VCDI 0 0 0 10 152 775 1079 0


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