Validation of sea ice concentration

Bulletin date: 2024-03-07

Model vs. observations, sea ice class contingency tables

Date: 2024-03-01:

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 13195 6390 527 199 32 2 4 0
OW 0 173 241 205 71 19 12 0
VODI 0 108 220 255 128 42 45 0
ODI 0 49 107 200 101 95 120 0
CDI 0 25 81 207 138 138 433 7
VCDI 0 8 155 369 358 731 8944 4025
...date precedes bulletin

Date: 2024-03-05:

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 12825 6209 901 471 140 10 20 0
OW 0 49 138 197 133 50 17 0
VODI 0 24 80 204 199 159 74 0
ODI 0 3 43 161 144 229 150 0
CDI 0 1 30 182 206 362 765 0
VCDI 0 1 13 102 214 1080 8610 3963
...date precedes bulletin

Date: 2024-03-07:

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 12808 6255 899 266 128 40 10 0
OW 0 53 202 159 111 64 19 0
VODI 0 16 136 174 183 199 54 0
ODI 0 5 57 134 161 225 189 0
CDI 0 1 48 81 228 379 924 79
VCDI 0 1 38 70 150 392 6923 6298
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12808 6250 911 267 126 39 10 0
OW 0 59 194 153 104 58 15 0
VODI 0 15 131 182 174 188 52 0
ODI 0 3 55 117 170 237 171 0
CDI 0 2 48 89 228 389 852 81
VCDI 0 2 41 76 159 388 7019 6296

Date: 2024-03-11:

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 5895 968 474 190 84 15 0
OW 2 33 191 139 117 83 25 0
VODI 0 6 93 155 191 162 73 0
ODI 0 0 21 104 178 285 181 0
CDI 0 0 11 50 150 522 1078 1
VCDI 0 0 19 64 82 359 7533 6071
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12556 5869 890 448 195 124 26 0
OW 0 54 172 119 74 94 48 0
VODI 0 8 128 136 182 165 146 0
ODI 0 3 55 90 152 216 202 0
CDI 0 0 32 101 177 412 856 0
VCDI 0 0 26 92 128 484 7627 6072

Date: 2024-03-13:

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 12602 5892 639 391 241 165 17 0
OW 0 53 188 90 78 100 20 0
VODI 0 7 106 160 112 168 86 0
ODI 0 0 36 90 114 190 163 0
CDI 0 0 11 69 153 408 768 28
VCDI 0 0 5 46 84 517 8462 5900
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12602 5816 578 391 261 243 38 0
OW 0 113 168 81 62 91 66 0
VODI 0 17 163 133 96 130 171 0
ODI 0 5 37 115 105 196 217 0
CDI 0 1 29 66 166 308 759 6
VCDI 0 0 10 60 92 580 8265 5922

Date: 2024-03-15:

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 12464 5691 767 406 210 133 5 0
OW 0 83 164 111 107 103 19 0
VODI 0 20 116 116 155 160 46 0
ODI 0 5 47 96 103 190 116 0
CDI 0 5 25 86 123 274 315 33
VCDI 0 2 13 124 191 768 7920 6847
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12464 5664 793 419 246 161 17 0
OW 0 92 128 96 100 126 43 0
VODI 0 33 126 134 138 147 117 0
ODI 0 8 47 86 125 189 141 3
CDI 0 3 16 99 146 384 483 55
VCDI 0 6 22 105 134 621 7620 6822


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