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: 2023-05-25

Model: ARC-MFC PHYS (TOPAZ)

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

Model vs. observations, sea ice class contingency tables

Date: 2023-05-29

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 1 0 4 5 0 0
OW 0 0 4 10 2 4 0 0
VODI 0 0 1 10 3 13 2 0
ODI 0 0 0 9 6 14 6 0
CDI 0 1 8 53 71 300 75 0
VCDI 0 0 0 0 24 2002 19673 14601
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 4 7 0 0
OW 0 0 0 0 3 10 3 0
VODI 0 0 0 3 5 30 11 0
ODI 0 0 6 13 3 21 48 0
CDI 0 0 0 30 12 123 279 0
VCDI 0 1 8 36 83 2147 19415 14601

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 3 0 0 0 0 0 0
VODI 0 7 0 0 0 0 0 0
ODI 0 4 3 6 0 0 0 0
CDI 0 4 1 32 16 95 78 0
VCDI 0 0 0 6 9 206 1130 1533
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 5 0 0 0 0 1 0
CDI 0 13 4 38 6 100 139 0
VCDI 0 0 0 6 19 201 1068 1533

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 3 27 33 0 0 0
OW 0 0 0 24 20 0 0 0
VODI 0 8 8 9 21 1 0 0
ODI 0 14 3 5 32 5 0 0
CDI 0 8 13 46 88 31 2 0
VCDI 0 0 0 16 83 204 2267 7011
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 9 49 0 0 0
OW 0 0 0 21 20 3 0 0
VODI 0 0 0 14 18 4 0 0
ODI 0 0 3 11 17 4 0 0
CDI 0 13 11 16 68 30 0 0
VCDI 0 17 13 56 105 200 2269 7011

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 83 3 4 11 0 0 0
OW 0 24 28 28 9 3 0 0
VODI 0 8 14 71 20 0 0 0
ODI 0 2 10 60 30 0 0 0
CDI 0 0 0 77 225 80 1 0
VCDI 0 0 0 0 10 199 3250 1404
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 25 1 18 22 0 0 0
OW 0 29 7 23 6 3 0 0
VODI 0 28 6 15 5 0 0 0
ODI 0 18 12 19 15 0 0 0
CDI 0 8 23 62 24 1 5 0
VCDI 0 9 6 103 233 278 3246 1404

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 11 14 2 0
ODI 0 0 0 0 24 26 21 0
CDI 0 0 0 16 114 294 130 1
VCDI 0 0 0 79 233 1862 4419 0
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 5 17 11 0
ODI 0 0 0 0 20 26 53 0
CDI 0 0 0 5 53 47 239 1
VCDI 0 0 0 90 304 2106 4269 0

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 18 9 14 1 0 0 0
OW 0 28 17 46 8 0 0 0
VODI 0 28 13 70 39 3 0 0
ODI 0 7 13 78 136 25 0 0
CDI 0 0 0 44 288 565 52 1
VCDI 0 0 0 5 83 375 2964 396
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 9 6 10 0 0 0 0
OW 0 2 2 26 7 0 0 0
VODI 0 12 6 42 36 2 0 0
ODI 0 32 17 37 73 16 0 0
CDI 0 26 21 110 227 321 111 1
VCDI 0 0 0 32 212 629 2905 396

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 543 101 159 0 0 0 0
OW 0 25 23 118 2 1 0 0
VODI 0 8 6 166 96 1 2 0
ODI 0 5 4 42 207 13 7 0
CDI 0 3 7 47 264 593 166 0
VCDI 0 0 0 0 31 1121 2283 287
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 511 89 172 0 0 0 0
OW 0 29 12 85 2 0 0 0
VODI 0 19 15 108 55 4 3 0
ODI 0 13 10 64 124 19 8 0
CDI 0 10 10 67 318 439 136 0
VCDI 0 2 5 36 101 1267 2311 287

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7329 2550 72 136 11 0 0 0
OW 0 89 31 116 10 0 0 0
VODI 0 44 12 123 78 1 0 0
ODI 0 26 28 87 170 47 0 0
CDI 0 0 1 15 117 220 15 0
VCDI 0 0 0 2 1 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 7329 2294 49 133 8 0 0 0
OW 0 83 20 67 20 0 0 0
VODI 0 101 16 92 75 10 0 0
ODI 0 90 10 74 98 105 8 0
CDI 0 93 22 42 100 68 7 0
VCDI 0 48 27 71 86 85 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 5163 2551 160 251 3 0 0 0
OW 0 0 12 180 22 0 0 0
VODI 0 0 0 222 162 0 0 0
ODI 0 0 0 45 699 24 0 0
CDI 0 0 0 6 355 1300 78 0
VCDI 0 0 0 0 0 90 373 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 5163 2551 166 331 8 0 0 0
OW 0 0 6 135 69 0 0 0
VODI 0 0 0 138 172 0 0 0
ODI 0 0 0 82 376 15 1 0
CDI 0 0 0 18 575 1056 73 0
VCDI 0 0 0 0 41 343 377 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 7173 3561 174 421 151 1 0 0
OW 0 15 13 121 60 0 0 0
VODI 0 1 1 75 124 2 0 0
ODI 0 0 0 1 275 47 0 0
CDI 0 0 0 0 57 495 107 0
VCDI 0 0 0 0 0 3 110 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 7173 3575 184 512 188 1 0 0
OW 0 2 4 93 111 5 0 0
VODI 0 0 0 13 217 39 0 0
ODI 0 0 0 0 130 240 3 0
CDI 0 0 0 0 21 263 214 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 0 523 139 200 10 0 0 0
OW 0 10 19 112 43 0 0 0
VODI 0 6 0 154 129 3 0 0
ODI 0 1 3 61 316 35 0 0
CDI 0 0 0 18 393 2198 176 0
VCDI 0 0 0 0 7 197 1050 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 471 126 221 25 0 0 0
OW 0 36 12 64 54 0 0 0
VODI 0 24 12 75 101 8 0 0
ODI 0 6 8 69 166 57 1 0
CDI 0 3 3 109 453 1260 440 0
VCDI 0 0 0 7 99 1108 785 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 0 215 157 225 5 0 0 0
OW 0 25 19 392 80 0 0 0
VODI 0 10 0 385 624 8 0 0
ODI 0 0 1 67 856 112 0 0
CDI 0 6 4 88 1793 2186 11 0
VCDI 0 0 0 28 91 533 666 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 0 188 146 348 65 0 0 0
OW 0 29 21 331 184 0 0 0
VODI 0 11 4 243 440 1 0 0
ODI 0 14 5 89 517 77 0 0
CDI 0 8 1 57 1291 1271 1 0
VCDI 0 6 4 117 952 1490 676 0

Labrador Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13045 3748 197 547 101 3 0 0
OW 0 0 3 245 81 6 0 0
VODI 0 0 0 154 280 10 0 0
ODI 0 0 0 4 453 45 6 0
CDI 0 0 0 0 101 664 163 0
VCDI 0 0 0 0 0 10 343 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 13045 3721 188 626 162 10 0 0
OW 0 27 9 153 171 8 0 0
VODI 0 0 3 148 242 19 9 0
ODI 0 0 0 21 335 109 65 0
CDI 0 0 0 2 106 577 370 0
VCDI 0 0 0 0 0 15 68 0


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