Validation of sea ice concentration

Bulletin date: 2021-07-15

Model vs. observations, sea ice class contingency tables

Date: 2021-07-09:

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 16706 6459 3834 1626 245 60 147 19
OW 0 0 71 201 227 73 87 0
VODI 0 0 18 189 260 224 200 2
ODI 0 0 0 81 135 239 286 1
CDI 0 0 0 58 134 452 1984 219
VCDI 0 0 0 4 25 152 1366 2375
...date precedes bulletin

Date: 2021-07-13:

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 17263 7007 3213 1427 430 85 139 0
OW 0 0 36 142 188 88 56 0
VODI 0 0 17 163 237 217 132 0
ODI 0 0 2 55 159 290 316 0
CDI 0 0 0 28 87 372 2232 1051
VCDI 0 0 0 1 7 13 602 2104
...date precedes bulletin

Date: 2021-07-15:

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 17473 7156 3070 1246 550 114 129 0
OW 0 0 45 100 216 136 57 0
VODI 0 0 19 61 249 250 176 0
ODI 0 0 2 30 127 270 357 8
CDI 0 0 0 12 141 368 2361 1471
VCDI 0 0 0 1 3 0 396 1565
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17473 7156 3081 1256 592 133 139 0
OW 0 0 37 91 172 120 54 0
VODI 0 0 16 59 247 236 159 0
ODI 0 0 2 30 127 252 357 12
CDI 0 0 0 13 144 397 2359 1491
VCDI 0 0 0 1 4 0 408 1541

Date: 2021-07-19:

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 17713 7264 3312 1211 420 86 78 0
OW 0 0 39 147 174 91 26 0
VODI 0 0 12 102 229 294 86 0
ODI 0 0 4 51 118 306 530 10
CDI 0 0 0 5 11 294 2039 2142
VCDI 0 0 0 1 2 2 352 1008
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17713 7264 3291 1191 444 98 88 0
OW 0 0 51 139 144 136 44 0
VODI 0 0 23 119 198 256 138 0
ODI 0 0 2 53 117 248 369 0
CDI 0 0 0 14 50 333 2257 2168
VCDI 0 0 0 1 1 2 215 992

Date: 2021-07-21:

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 18318 7147 3195 1103 283 83 91 0
OW 0 0 67 146 167 86 37 0
VODI 0 0 17 96 299 219 120 0
ODI 0 0 3 38 125 277 589 0
CDI 0 0 0 8 48 290 2249 1906
VCDI 0 0 0 0 1 1 203 947
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 18318 7147 3188 1065 276 92 106 0
OW 0 0 66 147 198 120 46 0
VODI 0 0 18 126 248 177 144 0
ODI 0 0 9 35 126 208 375 0
CDI 0 0 1 18 74 356 2386 1526
VCDI 0 0 0 0 1 3 232 1327

Date: 2021-07-23:

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 18845 7570 2661 830 211 71 72 0
OW 0 0 105 179 172 75 38 0
VODI 0 0 27 167 274 164 131 0
ODI 0 0 2 29 114 259 633 0
CDI 0 0 0 10 68 327 2156 2079
VCDI 0 0 0 0 0 0 111 779
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 18845 7570 2685 780 230 81 89 0
OW 0 0 75 210 201 97 61 0
VODI 0 0 26 142 208 145 123 0
ODI 0 0 9 69 102 180 434 0
CDI 0 0 0 14 98 393 2200 1592
VCDI 0 0 0 0 0 0 234 1266


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