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: 2023-06-01

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-06-05

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 3 0 0
OW 0 0 0 12 1 5 0 0
VODI 0 0 1 7 5 4 2 0
ODI 0 2 1 7 20 8 5 0
CDI 0 0 7 34 78 190 25 0
VCDI 0 0 0 3 60 1742 15794 18886
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 4 0 0
OW 0 0 0 0 1 7 4 0
VODI 0 0 0 8 4 11 10 0
ODI 0 0 0 10 3 15 21 0
CDI 0 2 8 14 44 105 252 0
VCDI 0 0 1 31 112 1810 15539 18886

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 4 2 0 0 0 0 0
OW 0 10 2 0 0 0 0 0
VODI 0 21 1 24 26 0 0 0
ODI 0 11 2 27 82 1 0 0
CDI 0 0 0 6 131 162 44 0
VCDI 0 0 0 63 149 453 1662 250
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 4 3 0 0 0 0 0
VODI 0 11 1 3 18 0 0 0
ODI 0 18 1 17 56 1 8 0
CDI 0 11 2 37 131 126 96 9
VCDI 0 0 0 63 183 489 1602 241

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 8 10 64 1 0 0 0
OW 0 13 4 48 10 0 0 0
VODI 0 7 3 53 21 0 0 0
ODI 0 20 11 24 23 0 0 0
CDI 0 0 3 44 111 77 25 0
VCDI 0 0 0 0 60 947 6524 1871
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 1 6 67 8 0 0 0
OW 0 3 5 29 10 0 0 0
VODI 0 12 3 49 12 0 0 0
ODI 0 10 3 19 14 0 0 0
CDI 0 16 9 36 35 9 5 0
VCDI 0 6 5 33 147 1015 6544 1871

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 67 21 34 34 1 0 0
OW 0 12 8 33 11 1 0 0
VODI 0 0 0 33 29 0 0 0
ODI 0 0 0 29 47 1 0 0
CDI 0 0 0 32 117 218 51 1
VCDI 0 0 0 2 55 340 2565 1912
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 61 14 34 37 1 0 0
OW 0 18 11 22 12 1 0 0
VODI 0 0 4 20 20 0 0 0
ODI 0 0 0 24 26 0 0 0
CDI 0 0 0 19 67 107 150 1
VCDI 0 0 0 44 131 452 2466 1912

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 5 0 0 0
VODI 0 0 0 10 10 1 0 0
ODI 0 0 0 24 16 12 16 0
CDI 0 0 0 103 239 396 61 0
VCDI 0 0 0 0 7 1098 4239 1009
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 16 0
ODI 0 0 0 1 19 7 93 1
CDI 0 0 0 80 93 122 280 0
VCDI 0 0 0 56 165 1378 3927 1008

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 40 9 23 0 0 0 0
OW 0 35 17 46 0 0 0 0
VODI 0 8 12 113 49 2 0 0
ODI 0 0 4 111 188 46 3 0
CDI 0 0 0 58 373 558 113 0
VCDI 0 0 0 0 46 208 2960 304
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 9 1 19 0 0 0 0
OW 0 20 4 42 8 0 0 0
VODI 0 41 21 40 87 14 0 0
ODI 0 13 12 75 84 80 6 0
CDI 0 0 4 175 420 465 369 0
VCDI 0 0 0 0 57 255 2701 304

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 996 103 123 0 0 0 0
OW 0 17 58 197 8 0 0 0
VODI 0 0 4 276 121 4 0 0
ODI 0 0 1 42 435 59 0 0
CDI 0 0 0 19 244 800 103 0
VCDI 0 0 0 0 8 157 2223 333
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 893 98 172 14 0 0 0
OW 0 63 14 106 36 0 0 0
VODI 0 37 26 143 154 17 0 0
ODI 0 11 13 131 180 79 5 0
CDI 0 9 15 71 366 693 228 0
VCDI 0 0 0 34 66 231 2093 333

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6894 3383 100 92 2 0 0 0
OW 0 47 38 96 6 0 0 0
VODI 0 22 7 120 59 0 0 0
ODI 0 12 18 85 144 28 0 0
CDI 0 0 0 6 118 53 1 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6894 3307 84 99 4 0 0 0
OW 0 55 31 73 11 0 0 0
VODI 0 40 21 87 61 1 0 0
ODI 0 33 6 45 68 26 0 0
CDI 0 29 21 95 172 48 1 0
VCDI 0 0 0 0 13 6 0 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 5350 2438 160 278 2 0 0 0
OW 0 0 25 212 13 0 0 0
VODI 0 0 0 313 129 0 0 0
ODI 0 0 0 28 647 15 0 0
CDI 0 0 0 0 360 941 92 0
VCDI 0 0 0 0 10 118 565 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5350 2429 161 360 10 0 0 0
OW 0 9 23 194 74 0 0 0
VODI 0 0 1 208 236 0 0 0
ODI 0 0 0 65 414 63 3 0
CDI 0 0 0 4 400 847 251 0
VCDI 0 0 0 0 27 164 403 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 7248 3561 247 391 51 0 0 0
OW 0 19 10 166 29 0 0 0
VODI 0 6 3 113 195 0 0 0
ODI 0 0 0 3 626 60 0 0
CDI 0 0 0 0 35 225 0 0
VCDI 0 0 0 0 0 0 0 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7248 3571 255 488 71 0 0 0
OW 0 15 4 131 137 2 0 0
VODI 0 0 1 49 426 29 0 0
ODI 0 0 0 5 249 162 0 0
CDI 0 0 0 0 53 92 0 0
VCDI 0 0 0 0 0 0 0 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 0 748 176 216 44 0 0 0
OW 0 28 12 152 57 0 0 0
VODI 0 11 1 141 214 0 0 0
ODI 0 0 0 18 772 84 0 0
CDI 0 0 0 0 279 1884 181 0
VCDI 0 0 0 0 0 54 731 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 733 170 301 65 0 0 0
OW 0 29 17 105 98 0 0 0
VODI 0 20 2 72 238 2 1 0
ODI 0 5 0 49 673 216 5 0
CDI 0 0 0 0 292 1690 581 0
VCDI 0 0 0 0 0 114 325 0

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 776 202 572 278 6 0 0
OW 0 20 30 310 234 30 0 0
VODI 0 0 4 137 396 47 0 0
ODI 0 0 0 25 469 242 0 0
CDI 0 0 0 3 172 2152 495 0
VCDI 0 0 0 0 11 138 1781 57
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 717 181 720 551 88 0 0
OW 0 53 37 139 268 97 3 0
VODI 0 24 15 108 333 459 74 0
ODI 0 2 3 55 197 566 668 0
CDI 0 0 0 25 184 1335 1030 0
VCDI 0 0 0 0 27 70 501 57

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13244 3862 154 527 173 0 0 0
OW 0 3 6 188 127 3 0 0
VODI 0 0 0 80 275 24 0 0
ODI 0 0 0 2 557 114 0 0
CDI 0 0 0 0 68 533 171 0
VCDI 0 0 0 0 1 6 91 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13244 3860 156 659 285 3 0 0
OW 0 5 4 107 273 65 1 0
VODI 0 0 0 31 379 135 30 0
ODI 0 0 0 0 184 371 124 0
CDI 0 0 0 0 66 86 104 0
VCDI 0 0 0 0 14 20 3 0


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