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: 2024-04-18

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: 2024-04-22

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 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 0 0 1 0 0 0 0
ODI 0 0 0 1 1 1 0 0
CDI 0 20 12 26 24 21 2 0
VCDI 0 0 2 43 134 479 4041 32094
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 1 1 1 0 0
CDI 0 0 1 6 1 7 1 1
VCDI 0 20 13 64 157 493 4042 32093

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 0 10 0
VCDI 0 0 0 0 0 229 668 2212
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 15 0
VCDI 0 0 0 0 0 229 663 2212

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 0 183 1691 8104
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 0 183 1691 8104

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 0 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 343 2372 2938
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 0 343 2372 2938

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 16 1093 6115
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 16 1093 6115

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 0 0
VCDI 0 0 0 0 0 96 1469 3734
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 96 1469 3734

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 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 0 168 3768 2381
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 2 0 0
VCDI 0 0 0 0 0 166 3768 2381

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 2554 2437 0 0 0 0 0 0
OW 0 536 141 46 0 0 0 0
VODI 0 35 37 416 71 0 0 0
ODI 0 27 10 91 452 40 0 0
CDI 0 40 34 118 391 893 37 0
VCDI 0 0 0 6 190 1299 1421 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 2554 2302 2 0 0 0 0 0
OW 0 351 70 41 0 0 0 0
VODI 0 229 77 238 99 10 0 0
ODI 0 75 17 177 284 126 0 0
CDI 0 67 22 112 389 674 127 0
VCDI 0 51 34 109 332 1422 1331 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 4894 2492 3 0 0 0 0 0
OW 0 302 89 28 0 0 0 0
VODI 0 42 43 222 12 0 0 0
ODI 0 28 6 137 158 0 0 0
CDI 0 34 16 50 294 849 71 0
VCDI 0 1 0 5 4 420 1496 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 4894 2429 10 2 0 0 0 0
OW 0 190 48 47 0 0 0 0
VODI 0 120 29 121 9 0 0 0
ODI 0 59 36 118 60 0 0 0
CDI 0 55 24 128 364 763 197 0
VCDI 0 46 10 26 35 506 1370 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 7320 2971 19 25 1 0 0 0
OW 0 211 107 65 16 0 0 0
VODI 0 1 55 356 58 2 0 0
ODI 0 0 0 151 331 29 0 0
CDI 0 0 0 2 282 694 72 0
VCDI 0 0 0 0 2 49 168 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7320 2877 35 46 3 0 0 0
OW 0 213 46 95 40 0 0 0
VODI 0 87 68 215 62 27 0 0
ODI 0 6 32 166 186 58 9 0
CDI 0 0 0 77 397 600 129 0
VCDI 0 0 0 0 2 89 102 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 65 0 0 0 0 0 0
OW 0 180 17 0 0 0 0 0
VODI 0 12 14 26 0 0 0 0
ODI 0 1 14 24 0 0 0 0
CDI 0 0 0 73 159 199 5 0
VCDI 0 0 0 0 37 507 3148 1322
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 50 0 0 0 0 0 0
OW 0 78 0 0 0 0 0 0
VODI 0 74 11 4 0 0 0 0
ODI 0 30 9 10 0 0 0 0
CDI 0 26 22 91 81 5 8 0
VCDI 0 0 3 18 115 701 3145 1322

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 0 0 0 0 0 0 0
OW 0 0 0 2 1 2 0 0
VODI 0 0 0 17 35 5 0 0
ODI 0 0 0 18 59 11 0 0
CDI 0 0 0 9 162 71 34 0
VCDI 0 0 0 0 147 962 4413 2590
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 1 1 0 0
OW 0 0 0 0 1 3 0 0
VODI 0 0 0 5 33 4 0 0
ODI 0 0 0 11 51 8 1 0
CDI 0 0 0 28 108 54 53 0
VCDI 0 0 0 2 210 981 4393 2590

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7172 4449 13 90 15 0 0 0
OW 42 477 158 158 50 0 0 0
VODI 9 2 26 422 199 0 0 0
ODI 0 0 0 73 237 14 1 0
CDI 0 0 0 4 356 578 182 0
VCDI 0 0 0 0 88 295 636 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7223 4291 19 87 8 0 0 0
OW 0 461 78 200 80 0 0 0
VODI 0 142 75 262 216 8 0 0
ODI 0 24 17 164 136 77 23 0
CDI 0 10 8 30 377 470 191 0
VCDI 0 0 0 4 128 332 605 0


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