Validation of sea ice concentration

Bulletin date: 2022-01-06

Model vs. observations, sea ice class contingency tables

Date: 2021-12-31:

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 13332 5857 1087 356 130 170 130 0
OW 0 13 228 117 69 62 49 0
VODI 0 0 147 125 112 116 92 0
ODI 0 0 64 88 94 90 167 0
CDI 0 0 41 76 53 221 430 39
VCDI 0 0 70 147 91 373 7710 6213
...date precedes bulletin

Date: 2022-01-04:

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 13332 5700 950 432 241 167 80 0
OW 0 20 180 98 101 90 38 0
VODI 0 5 108 120 117 143 42 0
ODI 0 0 45 83 126 222 47 0
CDI 0 0 19 68 110 342 233 22
VCDI 0 0 16 97 198 861 7476 6230
...date precedes bulletin

Date: 2022-01-06:

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 13111 5719 887 361 232 164 77 5
OW 0 33 158 98 77 127 65 0
VODI 0 8 118 114 103 152 88 0
ODI 0 0 37 77 63 162 134 0
CDI 0 0 14 59 69 229 421 6
VCDI 0 0 2 56 150 601 7572 6810
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13111 5719 902 358 239 184 91 5
OW 0 28 141 93 67 109 52 0
VODI 0 13 114 112 95 142 82 0
ODI 0 0 38 82 69 154 133 0
CDI 0 0 16 59 68 227 412 7
VCDI 0 0 5 61 156 619 7587 6809

Date: 2022-01-10:

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 13244 5952 915 375 142 58 31 0
OW 0 26 137 159 97 45 26 0
VODI 0 11 104 156 150 75 40 0
ODI 0 3 36 137 178 114 88 0
CDI 0 0 21 78 162 257 328 6
VCDI 0 0 3 35 100 634 6622 7614
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13244 5893 754 333 149 70 58 0
OW 0 63 151 112 79 50 25 0
VODI 0 27 130 123 113 77 62 0
ODI 0 7 99 127 117 97 111 0
CDI 0 2 67 158 198 178 283 17
VCDI 0 0 15 87 173 711 6596 7603

Date: 2022-01-12:

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 13573 5849 922 335 89 29 28 0
OW 0 56 185 153 56 34 14 0
VODI 0 14 143 162 115 100 31 0
ODI 0 0 71 134 147 171 96 0
CDI 0 0 29 75 131 256 434 18
VCDI 0 0 12 57 154 496 7779 6211
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13573 5781 839 289 85 43 51 0
OW 0 76 163 142 46 40 15 0
VODI 0 43 132 141 113 79 40 0
ODI 0 17 93 87 106 146 140 17
CDI 0 2 94 122 110 241 297 41
VCDI 0 0 41 135 232 537 7839 6171

Date: 2022-01-14:

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 12306 5494 2225 533 50 21 28 0
OW 0 0 153 274 58 28 22 0
VODI 0 0 96 327 136 115 39 0
ODI 0 0 22 219 168 139 131 11
CDI 0 0 8 153 127 179 501 92
VCDI 0 0 7 179 205 384 7610 6119
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12306 5492 2079 525 65 35 59 0
OW 0 2 198 170 41 26 26 0
VODI 0 0 142 241 100 91 46 0
ODI 0 0 50 207 112 136 121 0
CDI 0 0 10 217 129 157 315 4
VCDI 0 0 32 325 297 421 7764 6218


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