Validation of sea ice concentration

Bulletin date: 2024-02-29

Model vs. observations, sea ice class contingency tables

Date: 2024-02-23:

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 12096 6311 1033 399 104 24 9 0
OW 0 60 171 165 81 43 9 0
VODI 0 37 140 146 132 155 24 0
ODI 0 19 96 105 105 221 77 0
CDI 0 1 79 122 175 319 412 18
VCDI 0 0 74 156 245 863 8349 5584
...date precedes bulletin

Date: 2024-02-27:

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 12367 6493 1044 305 111 26 23 0
OW 0 50 198 214 113 45 26 0
VODI 0 78 157 205 158 126 78 0
ODI 0 8 80 125 122 188 157 0
CDI 0 3 64 116 120 314 541 15
VCDI 0 0 141 201 159 597 8365 5026
...date precedes bulletin

Date: 2024-02-29:

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 12757 6611 689 255 46 9 10 0
OW 0 92 266 210 73 21 7 0
VODI 0 69 184 263 166 61 49 0
ODI 0 31 113 177 111 92 131 0
CDI 0 16 90 187 134 166 385 0
VCDI 0 3 153 309 280 634 8753 4556
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12757 6573 701 272 49 8 10 0
OW 0 121 248 207 73 20 7 0
VODI 0 73 185 249 160 58 57 0
ODI 0 34 105 170 116 89 119 0
CDI 0 18 89 179 121 167 353 0
VCDI 0 3 167 324 291 641 8789 4556

Date: 2024-03-04:

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 12759 6249 863 516 86 12 14 0
OW 0 51 157 254 100 34 14 0
VODI 0 17 79 327 206 142 38 0
ODI 0 4 21 179 171 273 121 2
CDI 0 1 19 202 191 433 654 39
VCDI 0 1 7 113 213 1047 7454 5096
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12759 6119 682 339 86 18 13 0
OW 0 110 172 220 92 57 20 0
VODI 0 45 127 300 128 111 52 0
ODI 0 28 53 204 133 161 94 0
CDI 0 17 65 199 154 295 406 30
VCDI 0 4 47 329 374 1299 7710 5107

Date: 2024-03-06:

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 12818 6132 1059 336 133 18 14 0
OW 0 17 167 181 159 58 26 0
VODI 0 2 85 164 223 197 74 0
ODI 0 1 31 145 165 241 155 0
CDI 0 0 19 105 215 399 834 4
VCDI 0 1 29 76 177 855 8403 4441
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12818 5972 799 210 157 34 16 0
OW 0 126 192 127 75 64 15 0
VODI 0 38 163 178 151 120 60 0
ODI 0 13 81 152 140 180 162 0
CDI 0 1 75 166 217 254 688 0
VCDI 0 3 80 174 332 1116 8565 4445

Date: 2024-03-08:

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 12845 6084 854 322 149 58 9 0
OW 0 76 148 131 111 93 10 0
VODI 0 35 144 181 144 230 75 0
ODI 0 3 74 121 166 258 153 3
CDI 0 2 26 107 222 376 975 83
VCDI 0 4 34 59 136 363 7126 6169
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12845 5928 710 234 164 92 7 0
OW 0 144 182 105 66 98 16 0
VODI 0 57 148 142 83 172 72 0
ODI 0 33 86 130 110 194 170 0
CDI 0 34 69 172 255 298 663 38
VCDI 0 8 85 138 250 524 7420 6217


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