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: 2024-12-19

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: 2024-12-23

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 49 16 11 1 0 0 0
OW 0 9 12 69 19 0 0 0
VODI 0 2 0 27 42 0 0 0
ODI 0 0 0 10 42 10 0 0
CDI 0 0 0 1 47 118 6 0
VCDI 0 0 0 0 3 144 4786 31478
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 53 14 12 5 1 0 0
OW 0 7 14 51 20 12 0 0
VODI 0 0 0 34 38 20 8 0
ODI 0 0 0 9 43 22 17 0
CDI 0 0 0 12 36 94 167 0
VCDI 0 0 0 0 12 123 4600 31478

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 1 0 0
VCDI 0 0 0 0 0 12 335 2771
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 13 335 2771

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 0
VCDI 0 0 0 0 0 12 699 9267
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 12 699 9267

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 52 29 0 0
CDI 0 0 0 0 128 132 0 0
VCDI 0 0 0 0 57 549 1853 2853
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 25 0 0
ODI 0 0 0 0 5 60 0 0
CDI 0 0 0 0 47 120 0 0
VCDI 0 0 0 0 185 505 1853 2853

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 1
VCDI 0 0 0 0 0 0 0 7223

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 8 0
VCDI 0 0 0 0 0 33 850 4408
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 18 9
VCDI 0 0 0 0 0 32 840 4399

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 392 12 0 0 0 0 0
OW 0 142 57 17 0 0 0 0
VODI 0 14 35 173 0 0 0 0
ODI 0 0 1 134 93 1 0 0
CDI 0 0 0 63 198 201 10 0
VCDI 0 0 0 25 67 255 2692 1735
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 361 19 17 0 0 0 0
OW 0 133 42 39 2 0 0 0
VODI 0 32 20 133 27 0 0 0
ODI 0 19 12 100 96 9 0 0
CDI 0 3 12 74 166 285 93 2
VCDI 0 0 0 49 67 163 2609 1733

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5697 2941 44 10 0 0 0 0
OW 0 168 100 165 2 0 0 0
VODI 0 12 19 268 118 0 0 0
ODI 0 0 3 43 287 26 0 0
CDI 0 0 1 9 140 361 58 0
VCDI 0 0 0 13 23 145 669 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5697 2986 74 87 6 0 0 0
OW 0 100 50 189 43 4 0 0
VODI 0 25 34 158 163 21 0 0
ODI 0 10 9 56 163 142 11 0
CDI 0 0 0 17 185 319 475 0
VCDI 0 0 0 1 10 46 241 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 6228 2552 16 10 0 0 0 0
OW 0 163 66 67 11 0 0 0
VODI 0 34 14 71 41 2 0 0
ODI 0 10 23 24 45 7 0 0
CDI 0 11 16 72 82 93 18 0
VCDI 0 0 5 46 116 367 1358 128
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6228 2504 15 8 0 0 0 0
OW 0 111 45 20 4 0 0 0
VODI 0 80 21 63 10 0 0 0
ODI 0 48 9 56 36 4 0 0
CDI 0 16 37 81 104 97 16 0
VCDI 0 11 13 62 141 368 1360 128

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8577 2799 61 41 0 0 0 0
OW 0 197 81 137 17 0 0 0
VODI 0 6 8 137 99 14 0 0
ODI 0 1 1 42 70 40 0 0
CDI 0 0 2 13 85 163 27 0
VCDI 0 0 0 2 11 107 249 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8577 2611 50 55 0 0 0 0
OW 0 226 40 110 33 12 0 0
VODI 0 135 16 76 96 50 14 0
ODI 0 30 39 42 30 66 33 0
CDI 0 1 8 77 88 94 193 0
VCDI 0 0 0 12 35 102 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 0 110 7 7 0 0 0 0
OW 0 29 31 77 6 0 0 0
VODI 0 5 4 173 98 0 0 0
ODI 0 0 0 11 175 35 1 0
CDI 0 0 0 0 43 334 86 0
VCDI 0 0 0 0 0 635 3143 793
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 130 21 60 1 0 0 0
OW 0 11 19 125 27 0 0 0
VODI 0 3 2 78 133 16 0 0
ODI 0 0 0 5 127 86 6 0
CDI 0 0 0 0 34 314 407 0
VCDI 0 0 0 0 0 588 2817 793

Hudson Bay:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 223 831 27 26 0 0 0 0
OW 0 468 98 240 13 0 0 0
VODI 0 46 23 385 263 2 0 0
ODI 0 0 0 20 833 151 0 0
CDI 0 0 0 0 74 781 94 0
VCDI 0 0 0 0 0 736 3167 37
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 223 792 42 177 9 0 0 0
OW 0 378 53 257 192 6 0 0
VODI 0 147 44 193 494 126 4 0
ODI 0 28 9 44 379 337 43 0
CDI 0 0 0 0 72 452 828 0
VCDI 0 0 0 0 37 749 2386 37

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12036 1949 22 15 0 0 0 0
OW 10 272 79 64 12 0 0 0
VODI 0 29 5 196 79 10 0 0
ODI 0 0 0 20 175 121 0 0
CDI 0 0 0 0 63 431 22 0
VCDI 0 0 0 0 1 126 9 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12030 1916 87 58 1 0 0 0
OW 15 285 15 134 26 0 0 0
VODI 1 38 4 88 81 62 0 0
ODI 0 11 0 15 105 134 0 0
CDI 0 0 0 0 113 237 23 0
VCDI 0 0 0 0 4 255 8 0


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