Validation of sea ice concentration

Bulletin date: 2024-01-18

Model vs. observations, sea ice class contingency tables

Date: 2024-01-12:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12159 6173 915 450 252 142 29 0
OW 0 54 123 98 91 104 24 0
VODI 0 36 100 108 92 131 72 0
ODI 0 11 60 77 91 116 114 3
CDI 0 4 26 62 91 190 350 12
VCDI 0 1 13 46 99 266 7381 7993
...date precedes bulletin

Date: 2024-01-16:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11725 6073 994 505 218 147 20 0
OW 0 20 157 118 83 55 12 0
VODI 0 5 102 123 134 125 29 0
ODI 0 0 57 72 101 159 64 3
CDI 0 0 34 71 128 200 251 10
VCDI 0 0 11 87 260 580 8429 6997
...date precedes bulletin

Date: 2024-01-18:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12157 5913 766 442 140 113 6 0
OW 0 88 88 105 77 67 13 0
VODI 0 56 70 145 103 113 21 0
ODI 0 43 46 79 68 130 69 7
CDI 0 34 48 101 98 163 248 87
VCDI 0 13 65 202 217 454 8597 6907
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12157 5895 781 447 154 131 7 0
OW 0 100 78 97 61 56 14 0
VODI 0 62 62 131 97 101 24 0
ODI 0 42 47 84 72 120 59 8
CDI 0 32 44 97 95 163 237 89
VCDI 0 16 71 218 224 469 8613 6904

Date: 2024-01-22:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12554 5903 759 400 112 81 31 0
OW 0 133 84 114 64 43 18 0
VODI 0 53 74 148 94 58 25 1
ODI 0 19 58 96 107 108 42 2
CDI 0 5 57 78 100 309 260 45
VCDI 0 0 49 138 172 1306 7688 6771
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12554 5621 709 343 110 103 53 0
OW 0 155 68 120 45 35 24 0
VODI 0 130 46 113 93 67 45 2
ODI 0 69 43 118 108 78 57 3
CDI 0 63 36 63 99 275 226 39
VCDI 0 75 179 217 194 1347 7659 6775

Date: 2024-01-24:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12990 5591 676 355 113 38 2 0
OW 0 181 95 99 64 33 6 0
VODI 0 143 99 147 108 81 35 0
ODI 0 53 84 120 105 107 84 0
CDI 0 15 122 103 118 203 369 40
VCDI 0 0 76 196 228 897 8620 5763
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12990 5359 660 329 102 60 7 0
OW 0 171 73 104 48 45 10 0
VODI 0 157 75 134 100 61 48 0
ODI 0 101 61 112 131 159 101 0
CDI 0 87 66 90 133 220 265 18
VCDI 0 108 217 251 222 814 8685 5785

Date: 2024-01-26:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12950 5867 686 229 81 10 4 0
OW 0 198 137 104 55 13 7 0
VODI 0 113 145 203 80 47 29 0
ODI 0 54 112 231 109 55 82 4
CDI 0 35 104 202 142 183 369 68
VCDI 0 29 159 284 299 956 9579 4145
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12950 5647 688 244 94 19 10 0
OW 0 187 106 89 49 17 18 0
VODI 0 147 121 190 96 85 54 0
ODI 0 85 64 168 123 117 105 25
CDI 0 86 92 157 112 217 275 62
VCDI 0 144 272 405 292 809 9608 4130


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