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 0 116 9 19 0 0 0 0
OW 0 48 29 41 15 0 0 0
VODI 0 4 3 44 25 1 0 0
ODI 0 2 4 10 39 9 0 0
CDI 0 0 3 32 70 224 65 0
VCDI 0 0 0 0 14 211 5485 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 19 15 0
VCDI 0 0 0 0 0 98 1928 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 3 0 0
CDI 0 0 0 0 0 13 9 0
VCDI 0 0 0 0 0 82 2877 6994
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 4 3 18 0 0 0 0
OW 0 12 7 97 25 0 0 0
VODI 0 3 1 67 57 2 0 0
ODI 0 0 0 28 29 10 0 0
CDI 0 0 0 6 116 27 0 0
VCDI 0 0 0 1 224 1087 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 3 0 0
VCDI 0 0 0 0 0 248 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 12
VCDI 0 0 0 0 0 0 4 5283
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 0 439 60 131 15 7 0 0
OW 0 9 15 96 108 26 0 0
VODI 0 1 4 63 148 100 37 0
ODI 0 0 0 13 103 127 97 0
CDI 0 0 0 6 52 143 157 0
VCDI 0 0 0 1 17 195 3878 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 2683 36 84 2 0 0 0
OW 0 265 29 71 22 0 0 0
VODI 0 167 21 71 73 32 0 0
ODI 0 45 16 38 50 61 2 0
CDI 0 0 7 66 95 277 83 0
VCDI 0 0 0 0 13 81 224 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 2400 21 4 0 0 0 0
OW 0 124 22 18 0 0 0 0
VODI 0 60 33 47 2 0 0 0
ODI 0 22 30 56 16 0 0 0
CDI 0 4 32 161 174 104 10 0
VCDI 0 0 0 21 143 529 1313 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 2991 48 91 0 0 0 0
OW 0 169 52 112 55 8 0 0
VODI 0 31 30 111 135 36 0 0
ODI 0 0 3 60 61 110 0 0
CDI 0 0 0 21 97 179 17 0
VCDI 0 0 0 0 22 110 13 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 7 536 57 85 12 0 0 0
OW 0 24 23 106 40 0 0 0
VODI 0 4 1 82 76 36 2 0
ODI 0 0 0 13 88 82 2 0
CDI 0 0 0 0 84 205 491 0
VCDI 0 0 0 0 60 741 2322 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 1592 2156 76 81 4 0 0 0
OW 68 245 50 127 70 0 0 0
VODI 2 209 25 150 88 10 0 0
ODI 0 105 20 97 140 53 0 0
CDI 0 11 21 100 186 654 138 0
VCDI 0 0 0 1 47 1283 729 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 13615 1343 59 29 30 10 0 0
OW 11 19 19 122 13 14 0 0
VODI 0 5 2 55 71 80 13 0
ODI 0 1 0 0 48 143 9 0
CDI 0 0 0 0 11 14 7 0
VCDI 0 0 0 0 1 2 0 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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