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: 2024-12-12

Model: ARC-MFC PHYS (TOPAZ)

Data source: OSI SAF N.H. multi-product sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2024-12-16

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 0 145 13 5 0 0 0 0
OW 0 22 28 56 4 0 0 0
VODI 0 3 4 50 28 0 0 0
ODI 0 0 3 14 51 0 0 0
CDI 0 0 0 21 80 175 6 0
VCDI 0 0 0 0 0 270 5544 30380
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 113 7 13 0 0 0 0
OW 0 51 33 45 9 0 0 0
VODI 0 5 4 47 34 0 0 0
ODI 0 1 4 15 40 9 0 0
CDI 0 0 0 26 60 212 128 0
VCDI 0 0 0 0 20 224 5422 30380

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 0 117 1943 1059
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 14 0
VCDI 0 0 0 0 0 95 1929 1059

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 5 1 1
VCDI 0 0 0 0 0 93 2885 6993
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 23 12 0
VCDI 0 0 0 0 0 75 2874 6994

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 18 9 28 0 0 0 0
VODI 0 1 2 159 44 0 0 0
ODI 0 0 0 29 148 14 0 0
CDI 0 0 0 1 132 115 0 0
VCDI 0 0 0 0 127 997 2683 1146
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 8 4 20 0 0 0 0
OW 0 8 6 98 13 0 0 0
VODI 0 3 1 60 66 1 0 0
ODI 0 0 0 34 32 21 0 0
CDI 0 0 0 5 80 35 0 0
VCDI 0 0 0 0 260 1069 2683 1146

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 1 0 0
VCDI 0 0 0 0 0 250 1129 5844
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 3 0 1
VCDI 0 0 0 0 0 248 1129 5843

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 4 5295
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 4 5295

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 425 43 18 0 0 0 0
OW 0 24 30 76 2 0 0 0
VODI 0 0 6 169 65 0 0 0
ODI 0 0 0 29 170 15 0 0
CDI 0 0 0 14 146 296 18 0
VCDI 0 0 0 4 60 287 4151 269
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 438 57 106 8 3 0 0
OW 0 9 15 111 105 31 0 0
VODI 0 2 7 75 176 105 22 0
ODI 0 0 0 15 105 150 100 0
CDI 0 0 0 3 44 145 168 0
VCDI 0 0 0 0 5 164 3879 269

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6708 2730 16 41 0 0 0 0
OW 0 416 55 46 2 0 0 0
VODI 0 14 38 189 53 0 0 0
ODI 0 0 0 45 123 32 0 0
CDI 0 0 0 9 77 302 53 0
VCDI 0 0 0 0 0 117 256 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6708 2613 34 69 2 0 0 0
OW 0 297 28 77 27 0 0 0
VODI 0 194 21 78 69 44 0 0
ODI 0 56 21 37 52 62 2 0
CDI 0 0 5 60 72 256 84 0
VCDI 0 0 0 9 33 89 223 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 6350 2422 29 6 0 0 0 0
OW 0 174 62 68 1 0 0 0
VODI 0 14 29 85 28 0 0 0
ODI 0 0 18 54 47 0 0 0
CDI 0 0 0 83 151 159 30 0
VCDI 0 0 0 11 108 474 1293 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6350 2350 18 4 0 0 0 0
OW 0 151 19 19 0 0 0 0
VODI 0 84 32 46 2 0 0 0
ODI 0 25 40 59 19 0 0 0
CDI 0 0 29 158 160 100 4 0
VCDI 0 0 0 21 154 533 1319 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 8425 3036 57 93 0 0 0 0
OW 0 155 65 136 51 0 0 0
VODI 0 0 11 126 112 18 0 0
ODI 0 0 0 35 105 59 0 0
CDI 0 0 0 5 92 281 25 0
VCDI 0 0 0 0 10 85 5 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8425 2959 55 98 0 0 0 0
OW 0 180 38 104 59 14 0 0
VODI 0 49 34 106 125 48 0 0
ODI 0 3 6 67 69 74 0 0
CDI 0 0 0 20 100 227 23 0
VCDI 0 0 0 0 17 80 7 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 7 527 38 15 0 0 0 0
OW 0 34 43 94 11 0 0 0
VODI 0 3 0 167 70 0 0 0
ODI 0 0 0 10 131 1 0 0
CDI 0 0 0 0 102 312 22 0
VCDI 0 0 0 0 46 751 2795 624
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7 513 45 71 12 0 0 0
OW 0 49 30 99 36 0 0 0
VODI 0 2 6 95 80 50 0 0
ODI 0 0 0 21 94 94 12 0
CDI 0 0 0 0 80 201 520 0
VCDI 0 0 0 0 58 719 2285 624

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1591 2131 41 21 0 0 0 0
OW 68 552 103 122 18 0 0 0
VODI 3 43 48 320 112 0 0 0
ODI 0 0 0 93 288 97 0 0
CDI 0 0 0 0 107 944 77 0
VCDI 0 0 0 0 10 959 790 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1555 2079 73 71 0 0 0 0
OW 91 258 45 133 63 0 0 0
VODI 16 250 26 152 104 10 0 0
ODI 0 111 28 104 168 53 0 0
CDI 0 28 20 95 163 665 131 0
VCDI 0 0 0 1 37 1272 736 0

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13603 1321 20 7 26 3 0 0
OW 23 41 56 62 10 7 0 0
VODI 0 6 4 133 26 13 0 0
ODI 0 0 0 4 104 73 0 0
CDI 0 0 0 0 8 167 25 0
VCDI 0 0 0 0 0 0 4 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13607 1307 40 27 28 11 0 0
OW 19 54 36 98 8 18 0 0
VODI 0 5 4 78 57 72 3 0
ODI 0 2 0 3 69 138 13 0
CDI 0 0 0 0 12 24 11 0
VCDI 0 0 0 0 0 0 2 0


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