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: 2024-05-16

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: 2024-05-20

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 0 0 0 0 0
OW 0 12 3 0 0 0 0 0
VODI 0 2 10 27 0 0 0 0
ODI 0 0 2 22 30 0 0 0
CDI 0 0 0 31 226 725 41 0
VCDI 0 0 0 2 12 323 6000 29434
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 13 8 10 0 0 0 0
CDI 0 1 7 68 210 579 304 39
VCDI 0 0 0 4 58 469 5737 29395

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 2 0 0 0 0 0 0
OW 0 5 5 13 0 0 0 0
VODI 0 4 8 23 0 0 0 0
ODI 0 0 5 80 18 6 0 0
CDI 0 0 0 89 98 35 20 0
VCDI 0 0 0 0 17 114 1102 1475
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 4 0 0 0 0
ODI 0 2 2 7 7 4 1 0
CDI 0 9 16 172 81 27 23 0
VCDI 0 0 0 22 45 124 1098 1475

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 13 12 0 0 0
VODI 0 0 0 49 40 4 0 0
ODI 0 0 0 12 69 4 0 0
CDI 0 0 0 5 227 540 40 0
VCDI 0 0 0 0 32 1318 4442 3171
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 8 0 0 0 0
OW 0 0 0 12 9 0 0 0
VODI 0 0 0 22 35 2 0 0
ODI 0 0 0 21 53 6 2 0
CDI 0 0 0 16 223 370 49 0
VCDI 0 0 0 0 60 1488 4431 3171

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 20 1 0 0 0
ODI 0 0 0 40 7 2 0 0
CDI 0 0 0 61 132 248 40 0
VCDI 0 0 0 0 11 362 3301 1428
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 0 0 0 0
ODI 0 0 0 22 5 10 1 0
CDI 0 0 0 89 84 137 91 0
VCDI 0 0 0 8 62 465 3249 1428

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 1 0 0
CDI 0 0 0 0 0 6 0 5
VCDI 0 0 0 0 0 107 3078 4027
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 1 0 0
CDI 0 0 0 0 0 6 2 0
VCDI 0 0 0 0 0 107 3076 4032

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 1 0 0
ODI 0 0 0 0 0 5 1 0
CDI 0 0 0 0 0 13 28 14
VCDI 0 0 0 0 49 323 2539 2326
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 1 0 0
ODI 0 0 0 0 0 5 8 1
CDI 0 0 0 0 0 14 35 17
VCDI 0 0 0 0 49 322 2525 2322

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 4 0 0 0 0
VODI 0 0 0 10 11 2 3 0
ODI 0 0 0 65 100 14 8 0
CDI 0 0 0 24 318 552 47 1
VCDI 0 0 0 0 304 714 3804 336
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 6 0
ODI 0 0 0 1 1 9 6 0
CDI 0 0 0 99 301 324 157 3
VCDI 0 0 0 3 431 949 3693 334

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4273 2645 1 0 0 0 0 0
OW 0 575 208 92 1 0 0 0
VODI 0 7 47 665 31 2 1 0
ODI 0 0 0 151 410 12 2 0
CDI 0 0 0 6 378 1608 92 0
VCDI 0 0 0 5 7 80 23 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4273 2458 7 0 0 0 0 0
OW 0 536 108 88 4 0 0 0
VODI 0 199 93 434 34 7 2 0
ODI 0 30 42 248 103 14 3 0
CDI 0 4 6 143 600 1241 71 0
VCDI 0 0 0 6 86 440 42 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 5279 2785 17 0 0 0 0 0
OW 0 294 120 86 0 0 0 0
VODI 0 1 15 357 59 0 0 0
ODI 0 0 0 30 507 39 0 0
CDI 0 0 0 0 543 1341 33 0
VCDI 0 0 0 0 0 9 181 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5279 2702 30 3 0 0 0 0
OW 0 322 52 88 8 0 0 0
VODI 0 52 60 234 56 6 0 0
ODI 0 4 10 137 267 45 0 0
CDI 0 0 0 11 742 1303 42 0
VCDI 0 0 0 0 36 35 172 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 7768 3118 51 38 0 0 0 0
OW 0 87 89 178 13 0 0 0
VODI 0 9 2 282 136 6 0 0
ODI 0 0 0 10 281 29 0 0
CDI 0 0 0 0 89 434 59 0
VCDI 0 0 0 0 0 29 279 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7768 3045 29 56 9 0 0 0
OW 0 144 75 135 45 2 0 0
VODI 0 25 37 229 140 48 5 0
ODI 0 0 1 82 203 83 18 0
CDI 0 0 0 6 122 365 279 0
VCDI 0 0 0 0 0 0 36 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 0 240 0 0 0 0 0 0
OW 0 98 34 8 0 0 0 0
VODI 0 1 12 62 4 0 0 0
ODI 0 0 0 50 53 4 1 0
CDI 0 0 0 96 539 903 76 0
VCDI 0 0 0 0 16 383 3057 166
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 193 0 0 0 0 0 0
OW 0 87 13 0 0 0 0 0
VODI 0 34 16 32 0 0 0 0
ODI 0 20 6 42 20 3 1 0
CDI 0 5 11 100 445 677 255 0
VCDI 0 0 0 42 147 610 2878 166

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 515 5 16 2 0 0 0
OW 0 440 61 88 11 0 0 0
VODI 0 67 25 322 54 1 0 0
ODI 0 25 20 149 308 16 0 0
CDI 0 28 22 200 546 297 17 0
VCDI 0 0 0 23 255 1155 2660 1210
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 390 4 11 10 0 0 0
OW 0 219 9 64 26 0 0 0
VODI 0 113 16 133 55 4 0 0
ODI 0 79 16 133 102 31 0 0
CDI 0 217 49 225 518 176 39 0
VCDI 0 57 39 232 465 1258 2638 1210

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8605 4116 37 32 0 0 0 0
OW 0 290 158 196 2 0 0 0
VODI 0 1 9 612 123 0 0 0
ODI 0 0 0 105 467 6 0 0
CDI 0 0 0 49 257 338 19 0
VCDI 0 0 0 0 9 46 269 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8605 3852 32 16 0 0 0 0
OW 0 489 92 168 5 0 0 0
VODI 0 47 61 446 109 0 0 0
ODI 0 17 8 168 322 2 0 0
CDI 0 2 11 193 402 308 20 0
VCDI 0 0 0 3 20 80 268 0


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