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: 2024-12-26

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: 2024-12-30

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 93 3 0 0 0 0 0
OW 0 43 29 22 0 0 0 0
VODI 0 2 11 74 8 0 0 0
ODI 0 0 0 34 52 0 0 0
CDI 0 0 0 3 152 202 9 0
VCDI 0 0 0 0 1 327 4508 31329
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 116 8 3 0 0 0 0
OW 0 20 27 34 2 0 0 0
VODI 0 2 8 74 41 0 0 0
ODI 0 0 0 21 66 4 0 0
CDI 0 0 0 1 95 190 121 0
VCDI 0 0 0 0 9 335 4396 31329

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 1
VCDI 0 0 0 0 0 28 97 2993
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 28 97 2991

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 2
VCDI 0 0 0 0 0 0 0 9976
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 2
VCDI 0 0 0 0 0 0 0 9976

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 1 0 0
VCDI 0 0 0 0 0 167 1175 4310
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 0 168 1173 4310

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 0
VCDI 0 0 0 0 0 0 0 7224
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 7224

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 9 13 1
VCDI 0 0 0 0 0 75 1667 3534
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 7 19 7
VCDI 0 0 0 0 0 77 1661 3528

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 374 21 12 0 0 0 0
OW 0 134 39 41 2 0 0 0
VODI 0 34 10 105 17 0 0 0
ODI 0 17 1 43 54 0 0 0
CDI 0 23 21 62 158 139 2 0
VCDI 0 0 0 31 150 361 2390 2076
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 368 39 46 4 0 0 0
OW 0 92 10 58 26 0 0 0
VODI 0 46 20 53 56 39 0 0
ODI 0 17 2 51 64 119 6 0
CDI 0 27 3 30 88 114 86 4
VCDI 0 32 18 56 143 228 2300 2072

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6294 2676 12 0 0 0 0 0
OW 1 142 114 63 8 0 0 0
VODI 1 37 11 280 66 3 0 0
ODI 0 29 4 81 177 16 0 0
CDI 0 9 8 56 235 388 41 0
VCDI 0 0 0 4 30 123 413 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6294 2703 31 7 0 0 0 0
OW 1 87 86 79 17 0 0 0
VODI 1 34 17 181 69 0 0 0
ODI 0 22 5 87 138 53 0 0
CDI 0 30 2 91 260 355 89 0
VCDI 0 17 8 39 32 122 365 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 5976 2796 13 97 0 0 0 0
OW 0 131 39 84 22 0 0 0
VODI 0 8 29 62 54 0 0 0
ODI 0 3 11 58 44 2 0 0
CDI 0 0 5 81 115 93 14 0
VCDI 0 0 0 21 117 465 1293 63
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5976 2732 14 113 10 0 0 0
OW 0 122 14 59 24 0 0 0
VODI 0 61 15 45 49 0 0 0
ODI 0 19 26 25 41 6 0 0
CDI 0 4 28 111 65 71 0 0
VCDI 0 0 0 50 163 483 1307 63

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8257 2968 57 54 1 0 0 0
OW 0 122 73 127 12 0 0 0
VODI 0 13 36 171 79 3 0 0
ODI 0 0 4 53 118 47 0 0
CDI 0 0 0 17 83 214 106 0
VCDI 0 0 0 0 0 56 316 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8257 2884 48 44 0 0 0 0
OW 0 171 56 124 43 0 0 0
VODI 0 44 52 161 71 41 0 0
ODI 0 4 11 49 95 102 38 0
CDI 0 0 3 43 67 108 327 0
VCDI 0 0 0 1 17 69 57 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 1 0 4 0 0 0 0
OW 0 7 19 22 34 11 0 0
VODI 0 3 3 80 63 21 0 0
ODI 0 0 0 5 79 45 0 0
CDI 0 0 0 0 40 264 50 4
VCDI 0 0 0 0 0 373 3535 1140
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 6 8 7 12 23 0 0
OW 0 1 9 36 62 36 1 0
VODI 0 4 5 60 57 55 11 0
ODI 0 0 0 8 52 80 17 0
CDI 0 0 0 0 26 182 215 59
VCDI 0 0 0 0 7 338 3341 1085

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 388 930 4 1 0 0 0 0
OW 4 570 176 156 2 0 0 0
VODI 0 10 6 676 267 1 0 0
ODI 0 0 0 132 853 53 0 0
CDI 0 0 0 20 238 960 2 0
VCDI 0 0 0 28 100 1293 1609 59
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 381 950 30 6 0 0 0 0
OW 11 445 74 172 26 0 0 0
VODI 0 100 73 394 330 12 0 0
ODI 0 8 7 282 457 51 0 0
CDI 0 7 2 149 553 500 58 0
VCDI 0 0 0 10 94 1744 1553 59

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11144 2492 51 35 0 0 0 0
OW 24 290 93 244 0 0 0 0
VODI 0 32 10 259 99 2 0 0
ODI 0 0 0 22 61 17 0 0
CDI 0 0 0 8 23 135 25 0
VCDI 0 0 0 0 30 206 444 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11163 2548 100 123 7 0 0 0
OW 5 178 43 244 41 5 0 0
VODI 0 72 7 148 62 21 0 0
ODI 0 12 1 34 46 34 2 0
CDI 0 4 3 13 33 74 65 0
VCDI 0 0 0 6 24 226 402 0


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