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: 2023-05-04

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-05-08

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 2 0 0
OW 0 0 0 0 0 6 0 0
VODI 0 0 0 0 0 16 0 0
ODI 0 0 0 0 0 11 2 0
CDI 0 0 0 0 7 96 94 0
VCDI 0 0 0 0 52 425 4851 31340
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 8 0 0
OW 0 0 0 0 0 17 0 0
VODI 0 0 0 0 0 14 14 0
ODI 0 0 0 0 0 17 56 0
CDI 0 0 0 0 2 73 80 0
VCDI 0 0 0 0 57 427 4797 31340

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 2 4 6 1
VCDI 0 0 0 0 87 168 2045 820
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 2 0 30 0
VCDI 0 0 0 0 87 172 2021 821

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 3 0 0 0 0
VODI 0 0 0 12 1 0 0 0
ODI 0 0 0 13 10 0 0 0
CDI 0 0 0 64 112 27 2 0
VCDI 0 0 0 58 241 723 3439 5277
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 8 0 0 0 0
CDI 0 0 0 19 13 5 2 0
VCDI 0 0 0 123 351 745 3439 5277

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 11 0 0 0
CDI 0 0 0 0 12 7 17 4
VCDI 0 0 0 0 70 251 1893 3389
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 7 0 1 0
CDI 0 0 0 0 14 8 34 7
VCDI 0 0 0 0 72 250 1875 3386

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 4 8 16 12
VCDI 0 0 0 0 6 200 1761 5239
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 1 4 19 15
VCDI 0 0 0 0 9 204 1758 5236

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 27 2 0
VCDI 0 0 0 0 0 174 3720 1403
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 26 2 0
VCDI 0 0 0 0 0 175 3720 1403

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 34 0 0 0 0 0 0
OW 0 12 1 0 0 0 0 0
VODI 0 8 4 2 3 0 0 0
ODI 0 4 8 9 16 22 2 0
CDI 0 0 1 33 80 227 10 0
VCDI 0 0 0 0 14 650 4742 449
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 5 0 0 0 0 0 0
VODI 0 22 0 0 0 0 0 0
ODI 0 17 1 0 4 14 1 0
CDI 0 14 8 9 31 74 8 0
VCDI 0 0 5 35 78 811 4745 449

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4991 3082 193 160 0 0 0 0
OW 0 3 31 160 31 0 0 0
VODI 0 0 3 121 130 6 0 0
ODI 0 0 0 19 252 9 0 0
CDI 0 0 0 5 182 514 1 0
VCDI 0 0 0 0 50 1065 323 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4991 3060 197 210 16 0 0 0
OW 0 17 19 122 62 0 0 0
VODI 0 8 7 88 104 6 0 0
ODI 0 0 3 28 144 27 0 0
CDI 0 0 1 16 212 113 0 0
VCDI 0 0 0 1 107 1448 324 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 4439 3017 148 241 24 0 0 0
OW 0 0 13 119 35 5 0 0
VODI 0 0 0 103 116 4 0 0
ODI 0 0 0 11 237 9 0 0
CDI 0 0 0 0 361 1507 17 0
VCDI 0 0 0 0 0 253 1032 5
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4439 3016 143 255 31 2 0 0
OW 0 1 18 94 36 6 0 0
VODI 0 0 0 93 100 9 0 0
ODI 0 0 0 30 138 17 0 0
CDI 0 0 0 2 405 817 14 0
VCDI 0 0 0 0 63 927 1035 5

Southeast Greenland:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7414 3538 126 311 116 16 0 0
OW 0 5 29 108 36 1 0 0
VODI 0 0 0 74 123 2 0 0
ODI 0 0 0 0 192 33 1 0
CDI 0 0 0 0 119 411 54 0
VCDI 0 0 0 0 0 67 212 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7414 3543 151 387 142 17 0 0
OW 0 0 4 81 84 9 0 0
VODI 0 0 0 25 131 38 0 0
ODI 0 0 0 0 124 64 13 0
CDI 0 0 0 0 105 390 209 0
VCDI 0 0 0 0 0 12 45 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 0 216 39 31 0 0 0 0
OW 0 0 11 50 6 0 0 0
VODI 0 0 0 70 48 0 0 0
ODI 0 0 0 56 122 12 0 0
CDI 0 0 0 73 275 640 16 0
VCDI 0 0 0 12 283 1406 2436 1
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 213 37 38 1 0 0 0
OW 0 3 11 41 17 0 0 0
VODI 0 0 2 38 45 0 0 0
ODI 0 0 0 42 69 13 0 0
CDI 0 0 0 44 177 245 11 0
VCDI 0 0 0 89 425 1800 2441 1

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 1 0 20 0 0 0 0
OW 0 0 3 98 9 0 0 0
VODI 0 0 0 141 78 4 0 0
ODI 0 0 0 41 242 73 1 0
CDI 0 0 0 73 237 617 123 0
VCDI 0 0 0 10 69 534 6000 213
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 6 0 0 0 0
OW 0 1 0 53 13 0 0 0
VODI 0 0 2 107 74 13 0 0
ODI 0 0 1 87 136 130 19 0
CDI 0 0 0 101 305 482 362 0
VCDI 0 0 0 29 107 603 5743 213

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10815 5490 246 340 6 0 0 0
OW 0 7 9 283 73 0 0 0
VODI 0 0 2 159 289 4 1 0
ODI 0 0 0 4 550 63 6 0
CDI 0 0 0 0 116 542 66 0
VCDI 0 0 0 0 1 107 1030 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 10815 5491 246 488 75 0 0 0
OW 0 6 9 221 114 0 0 0
VODI 0 0 2 63 349 20 4 0
ODI 0 0 0 14 382 132 35 0
CDI 0 0 0 0 115 532 667 0
VCDI 0 0 0 0 0 32 397 0


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