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: 2025-08-21

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: 2025-08-25

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 1123 2915 26 29 0 0 0 0
OW 0 485 258 458 0 0 0 0
VODI 0 0 10 1609 600 0 0 0
ODI 0 0 0 113 9114 418 0 0
CDI 0 0 0 0 2838 11566 234 0
VCDI 0 0 0 0 1 2126 2979 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1123 2610 22 33 0 0 0 0
OW 0 680 126 238 9 0 0 0
VODI 0 110 146 1668 1072 0 0 0
ODI 0 0 0 270 8053 2152 10 0
CDI 0 0 0 0 3417 9275 414 0
VCDI 0 0 0 0 2 2683 2789 0

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 482 430 5 50 4 0 0 0
OW 49 219 42 180 11 0 0 0
VODI 0 7 7 190 79 0 0 0
ODI 0 3 0 28 142 0 0 0
CDI 0 4 0 11 145 262 11 0
VCDI 0 0 0 0 12 499 247 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 468 384 5 49 5 0 0 0
OW 63 136 4 8 6 0 0 0
VODI 0 121 38 107 22 0 0 0
ODI 0 7 7 229 137 0 0 0
CDI 0 15 0 66 170 280 24 0
VCDI 0 0 0 0 53 481 234 0

Beaufort Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 358 1725 3 3 0 0 0 0
OW 200 2168 361 578 0 0 0 0
VODI 0 23 56 1471 270 0 0 0
ODI 0 0 0 62 1202 23 0 0
CDI 0 0 0 0 152 1079 120 0
VCDI 0 0 0 0 0 79 45 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 310 1096 0 0 0 0 0 0
OW 248 2290 179 183 0 0 0 0
VODI 0 530 241 1391 105 0 0 0
ODI 0 0 0 539 988 26 0 0
CDI 0 0 0 1 531 997 118 0
VCDI 0 0 0 0 0 158 47 0

Chuckchi Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 3241 1183 0 0 0 0 0 0
OW 4 685 86 48 0 0 0 0
VODI 0 1 20 299 20 0 0 0
ODI 0 0 0 4 62 0 0 0
CDI 0 0 0 0 0 0 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 2972 845 0 0 0 0 0 0
OW 273 944 25 27 0 0 0 0
VODI 0 80 81 314 35 0 0 0
ODI 0 0 0 10 47 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 0 0 0

Siberian Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 1420 1845 0 0 0 0 0 0
OW 2 891 213 220 0 0 0 0
VODI 0 19 59 772 157 0 0 0
ODI 0 0 0 33 1501 0 0 0
CDI 0 0 0 0 83 9 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 1350 1518 4 0 0 0 0 0
OW 72 1094 160 222 10 0 0 0
VODI 0 143 106 724 390 0 0 0
ODI 0 0 2 79 1341 9 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 0 0 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 2362 1703 8 0 0 0 0 0
OW 0 283 131 134 0 0 0 0
VODI 0 0 6 362 43 0 0 0
ODI 0 0 0 16 251 0 0 0
CDI 0 0 0 0 0 0 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 2345 1452 15 2 0 0 0 0
OW 17 505 81 74 0 0 0 0
VODI 0 29 49 337 59 0 0 0
ODI 0 0 0 99 235 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 0 0 0

Kara Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6226 30 0 0 0 0 0 0
OW 61 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 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 6223 30 0 0 0 0 0 0
OW 64 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 0

Barents Sea:

observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11322 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 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 11322 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 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 9021 2107 0 0 0 0 0 0
OW 0 106 67 52 0 0 0 0
VODI 0 1 4 112 10 0 0 0
ODI 0 0 0 24 57 0 0 0
CDI 0 0 0 0 38 23 2 0
VCDI 0 0 0 0 4 41 27 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 9021 2018 0 0 0 0 0 0
OW 0 184 38 17 0 0 0 0
VODI 0 10 31 116 7 0 0 0
ODI 0 2 2 52 88 48 8 0
CDI 0 0 0 3 14 16 21 0
VCDI 0 0 0 0 0 0 0 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 12380 599 8 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 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 12380 599 8 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 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 5239 382 0 2 0 0 0 0
OW 0 47 9 43 0 0 0 0
VODI 0 0 0 57 0 0 0 0
ODI 0 0 0 18 6 0 0 0
CDI 0 0 0 0 0 0 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 5239 360 0 1 0 0 0 0
OW 0 60 3 14 0 0 0 0
VODI 0 9 6 87 5 0 0 0
ODI 0 0 0 18 1 0 0 0
CDI 0 0 0 0 0 0 0 0
VCDI 0 0 0 0 0 0 0 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 8512 4 0 0 0 0 0 0
OW 19 0 0 0 0 0 0 0
VODI 3 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 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 8509 4 0 0 0 0 0 0
OW 22 0 0 0 0 0 0 0
VODI 3 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 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 15741 0 4 0 0 0 0 0
OW 1 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 0
observations
Ice free Ice free
near MIZ		 OW VODI ODI CDI VCDI
near MIZ		 VCDI
m
o
d
e
l		 Ice free 15716 0 4 0 0 0 0 0
OW 26 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 0


Generated by /metno/routine/sms/V3/SIconcentrationValidation5/SICmultiWebPage5GODAE.sh Fri Sep 5 02:43:41 UTC 2025 on arcval2

 
See Met Privacy