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: 2023-05-18

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-05-22

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 11 0 0 0
OW 0 0 0 0 5 3 0 0
VODI 0 0 0 0 10 7 0 0
ODI 0 0 0 0 19 30 1 0
CDI 0 0 0 0 19 241 79 0
VCDI 0 0 0 0 38 829 11226 24384
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 15 1 0 0
OW 0 0 0 0 9 7 0 0
VODI 0 0 0 0 6 34 0 0
ODI 0 0 0 0 2 42 14 0
CDI 0 0 0 0 22 89 75 0
VCDI 0 0 0 0 48 937 11217 24384

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 3 0 0 0 0
ODI 0 0 0 7 0 0 0 0
CDI 0 0 0 18 24 5 12 1
VCDI 0 0 0 0 15 88 1008 1952
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 26 27 9 51 3
VCDI 0 0 0 2 12 84 969 1950

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 31 26 31 3 0 0 0
OW 0 1 2 27 7 0 0 0
VODI 0 0 3 19 13 0 0 0
ODI 0 0 0 13 17 1 0 0
CDI 0 0 0 23 25 35 21 0
VCDI 0 0 0 0 34 735 7349 1566
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 14 7 20 10 0 0 0
VODI 0 15 10 23 15 0 0 0
ODI 0 2 9 20 11 9 0 0
CDI 0 1 5 20 4 18 2 0
VCDI 0 0 0 30 59 744 7368 1566

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 1 6 0 0 0 0
OW 0 6 2 29 0 0 0 0
VODI 0 0 3 58 11 6 0 0
ODI 0 0 0 45 14 21 0 0
CDI 0 0 0 18 98 119 16 0
VCDI 0 0 0 0 90 737 4343 31
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 0 1 14 0 0 0 0
OW 0 1 1 27 4 2 0 0
VODI 0 4 1 19 8 18 0 0
ODI 0 1 3 23 8 35 0 0
CDI 0 0 0 64 31 84 129 0
VCDI 0 0 0 9 162 744 4230 31

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 1 6 0 0
CDI 0 0 0 0 60 278 42 0
VCDI 0 0 0 0 172 1732 4627 328
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 5 0 0
CDI 0 0 0 0 24 124 66 0
VCDI 0 0 0 0 209 1887 4603 328

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 8 0 0 0 0
VODI 0 0 0 16 14 6 0 0
ODI 0 0 0 15 38 19 4 0
CDI 0 0 0 49 123 302 38 0
VCDI 0 0 0 0 46 518 2708 1422
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 1 0 0 0
VODI 0 0 0 7 5 0 0 0
ODI 0 0 0 4 14 8 0 0
CDI 0 0 0 24 64 94 21 0
VCDI 0 0 0 49 137 743 2729 1422

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 159 20 44 0 0 0 0
OW 0 21 24 104 0 0 0 0
VODI 0 0 5 147 104 0 0 0
ODI 0 0 0 42 167 1 0 0
CDI 0 0 0 21 253 533 2 0
VCDI 0 0 0 2 65 1194 3011 412
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 120 15 62 0 0 0 0
OW 0 31 14 59 6 0 0 0
VODI 0 21 1 96 29 0 0 0
ODI 0 7 14 35 91 0 0 0
CDI 0 1 5 82 250 147 12 0
VCDI 0 0 0 26 213 1581 3001 412

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5878 2895 127 191 35 1 0 0
OW 0 8 46 143 41 1 0 0
VODI 0 0 0 103 149 3 0 0
ODI 0 0 0 34 254 24 0 0
CDI 0 0 0 13 443 514 6 0
VCDI 0 0 0 0 154 250 18 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5878 2848 104 178 48 1 0 0
OW 0 46 38 68 32 0 0 0
VODI 0 9 28 88 53 0 0 0
ODI 0 0 3 86 86 4 0 0
CDI 0 0 0 64 439 281 0 0
VCDI 0 0 0 0 418 507 24 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 5057 2640 169 203 4 0 0 0
OW 0 2 12 158 21 0 0 0
VODI 0 0 0 144 123 0 0 0
ODI 0 0 0 20 630 16 0 0
CDI 0 0 0 0 457 1198 57 0
VCDI 0 0 0 0 0 196 589 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5057 2641 170 305 26 0 0 0
OW 0 1 11 119 50 0 0 0
VODI 0 0 0 68 155 0 0 0
ODI 0 0 0 25 214 15 0 0
CDI 0 0 0 8 706 670 22 0
VCDI 0 0 0 0 84 725 624 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 7338 3588 166 260 145 40 0 0
OW 0 5 10 149 46 14 0 0
VODI 0 0 0 47 126 18 1 0
ODI 0 0 0 3 135 31 8 0
CDI 0 0 0 0 91 277 43 0
VCDI 0 0 0 0 0 33 414 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7338 3593 176 342 194 63 0 0
OW 0 0 0 98 84 19 3 0
VODI 0 0 0 19 142 45 18 0
ODI 0 0 0 0 100 121 37 0
CDI 0 0 0 0 23 165 265 0
VCDI 0 0 0 0 0 0 143 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 0 491 109 60 0 0 0 0
OW 0 11 49 200 6 0 0 0
VODI 0 5 11 216 78 0 0 0
ODI 0 3 0 74 183 5 0 0
CDI 0 0 0 25 517 899 32 0
VCDI 0 0 0 0 25 222 2446 136
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 368 59 52 0 0 0 0
OW 0 58 22 56 17 0 0 0
VODI 0 47 51 104 43 0 0 0
ODI 0 22 23 202 69 17 0 0
CDI 0 15 14 114 258 400 54 0
VCDI 0 0 0 47 422 709 2424 136

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 209 63 36 2 0 0 0
OW 0 22 49 231 47 0 0 0
VODI 0 8 5 266 276 13 0 0
ODI 0 0 0 59 565 146 4 0
CDI 0 8 1 50 271 718 56 0
VCDI 0 0 0 2 351 1430 3631 68
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 145 36 86 24 0 0 0
OW 0 52 37 159 127 21 0 0
VODI 0 36 36 201 315 50 0 0
ODI 0 6 8 111 310 252 3 0
CDI 0 2 0 58 264 484 491 0
VCDI 0 6 1 29 472 1500 3197 68

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11265 5333 252 464 122 0 0 0
OW 0 0 3 225 210 9 0 0
VODI 0 0 0 135 273 25 1 0
ODI 0 0 0 0 318 31 18 0
CDI 0 0 0 0 89 484 102 0
VCDI 0 0 0 0 0 99 751 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11265 5329 249 637 372 16 0 0
OW 0 4 6 143 151 23 6 0
VODI 0 0 0 44 233 35 12 0
ODI 0 0 0 0 206 88 52 0
CDI 0 0 0 0 50 485 572 0
VCDI 0 0 0 0 0 1 230 0


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