Validation of sea ice concentration

Bulletin date: 2022-02-24

Model vs. observations, sea ice class contingency tables

Date: 2022-02-18:

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 12811 5582 1131 403 189 69 86 0
OW 0 72 164 132 105 81 36 0
VODI 0 24 151 130 191 189 59 0
ODI 0 2 95 99 202 314 130 0
CDI 0 0 135 99 235 413 561 10
VCDI 0 76 181 273 336 829 7822 4742
...date precedes bulletin

Date: 2022-02-22:

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 12597 5596 1060 359 199 121 76 0
OW 0 27 156 130 109 86 26 0
VODI 0 4 103 117 153 192 60 0
ODI 0 0 51 95 162 310 136 0
CDI 0 0 46 74 124 416 697 17
VCDI 0 0 61 134 175 508 7984 5998
...date precedes bulletin

Date: 2022-02-24:

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 12650 5599 949 481 140 102 70 0
OW 0 38 153 149 93 78 26 0
VODI 0 20 98 139 115 149 53 0
ODI 0 3 61 99 115 222 116 0
CDI 0 0 54 142 130 322 403 68
VCDI 0 0 101 217 209 587 8703 5505
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12650 5596 954 487 150 101 74 0
OW 0 37 137 151 80 80 26 0
VODI 0 23 112 125 122 163 54 0
ODI 0 4 60 117 126 223 133 1
CDI 0 0 57 126 119 303 449 64
VCDI 0 0 96 221 205 590 8635 5508

Date: 2022-02-28:

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 13454 5586 532 420 180 108 48 0
OW 0 117 75 150 88 60 40 0
VODI 0 66 71 187 166 145 62 0
ODI 0 31 58 101 146 188 115 2
CDI 0 23 61 93 126 368 364 14
VCDI 0 28 119 175 255 1513 7702 5122
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13454 5391 467 419 165 103 58 0
OW 0 162 83 125 87 64 43 0
VODI 0 116 75 175 154 128 72 0
ODI 0 75 52 95 123 151 106 0
CDI 0 70 55 101 132 270 314 21
VCDI 0 37 184 211 300 1666 7738 5117

Date: 2022-03-02:

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 13516 5592 488 416 108 79 102 0
OW 0 110 103 163 116 53 20 0
VODI 0 71 88 195 148 100 68 0
ODI 0 16 69 140 118 119 104 0
CDI 0 9 43 176 134 229 419 2
VCDI 0 58 93 261 298 1178 8145 5012
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13516 5382 417 396 106 83 125 0
OW 0 147 102 155 81 39 29 0
VODI 0 138 91 170 151 97 67 0
ODI 0 71 60 138 104 106 112 0
CDI 0 51 82 126 130 166 452 17
VCDI 0 67 132 366 350 1267 8073 4997

Date: 2022-03-04:

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 13164 5666 677 343 136 92 125 0
OW 0 82 142 111 111 51 33 0
VODI 0 27 110 152 172 133 71 0
ODI 0 12 72 103 137 198 162 0
CDI 0 7 78 98 169 331 454 16
VCDI 0 26 95 161 225 815 6904 6698
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13164 5519 560 301 127 100 152 0
OW 0 137 134 110 74 47 40 0
VODI 0 90 131 122 164 119 74 0
ODI 0 23 85 97 133 158 186 0
CDI 0 16 116 128 152 270 457 10
VCDI 0 35 148 210 300 926 6840 6704


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