Validation of sea ice concentration

Bulletin date: 2020-11-19

Model vs. observations, sea ice class contingency tables

Date: 2020-11-13:

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 19910 7313 824 243 114 107 51 0
OW 0 93 202 161 65 39 45 0
VODI 0 14 131 153 97 91 55 0
ODI 0 4 48 78 98 103 57 0
CDI 0 1 19 50 95 196 284 23
VCDI 0 0 5 8 60 411 3750 3161
...date precedes bulletin

Date: 2020-11-17:

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 19203 7561 1293 404 128 103 21 0
OW 0 15 145 141 63 50 7 0
VODI 0 0 105 115 116 75 29 0
ODI 0 0 28 80 86 171 86 6
CDI 0 0 9 28 66 222 279 96
VCDI 0 0 4 12 94 242 3714 3362
...date precedes bulletin

Date: 2020-11-19:

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 18697 7723 1214 355 75 102 32 0
OW 0 89 284 185 55 28 6 0
VODI 0 16 77 176 114 50 21 0
ODI 0 5 30 67 104 102 81 0
CDI 0 0 46 52 58 211 286 7
VCDI 0 0 10 28 62 366 4125 3220
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 18697 7741 1279 406 84 97 34 0
OW 0 61 183 133 52 36 8 0
VODI 0 26 111 168 108 56 19 0
ODI 0 5 25 75 105 103 87 0
CDI 0 0 40 45 52 185 298 7
VCDI 0 0 23 36 67 382 4105 3220

Date: 2020-11-23:

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 18762 7162 981 622 166 80 39 0
OW 0 19 104 254 105 51 9 0
VODI 0 11 36 219 191 86 21 0
ODI 0 3 8 112 260 119 37 0
CDI 0 1 12 57 209 205 167 0
VCDI 0 0 5 19 97 363 3844 3723
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 18762 7039 786 538 217 112 46 0
OW 0 125 212 247 114 38 13 0
VODI 0 25 112 309 165 54 13 0
ODI 0 6 16 101 176 115 32 0
CDI 0 1 15 56 187 158 113 5
VCDI 0 0 5 32 169 427 3900 3718

Date: 2020-11-25:

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 18786 7251 1041 420 94 66 39 0
OW 1 30 169 267 66 33 6 0
VODI 0 12 61 246 160 47 22 0
ODI 0 3 24 114 171 103 47 0
CDI 0 1 8 59 225 241 197 0
VCDI 0 0 5 35 80 322 4753 2954
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 18786 7105 760 382 167 89 41 0
OW 1 136 287 237 85 34 14 0
VODI 0 42 174 280 106 74 24 0
ODI 0 10 39 129 139 109 42 0
CDI 0 4 24 59 178 164 114 0
VCDI 0 0 24 54 121 342 4829 2954

Date: 2020-11-27:

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 17813 7917 1164 428 161 49 64 0
OW 0 35 211 199 128 86 33 0
VODI 0 16 85 161 125 152 51 0
ODI 0 5 24 116 74 157 81 0
CDI 0 5 12 60 95 193 317 0
VCDI 0 1 15 40 53 184 5008 2841
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17813 7802 964 344 114 124 105 0
OW 0 109 241 186 107 76 24 0
VODI 0 43 183 184 175 146 52 0
ODI 0 12 64 118 78 97 71 0
CDI 0 7 35 93 79 136 207 0
VCDI 0 6 24 79 83 242 5095 2841


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