Validation of sea ice concentration

Bulletin date: 2020-12-03

Model vs. observations, sea ice class contingency tables

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
...date precedes bulletin

Date: 2020-12-01:

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 18047 8030 811 455 99 10 20 0
OW 0 108 174 184 78 22 19 0
VODI 0 22 112 191 140 56 29 0
ODI 0 1 65 160 169 127 52 0
CDI 0 0 33 97 132 186 181 0
VCDI 0 0 22 81 82 351 4051 3762
...date precedes bulletin

Date: 2020-12-03:

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 17630 7538 1062 495 216 140 22 0
OW 0 206 201 151 128 95 10 0
VODI 0 12 170 116 160 147 29 0
ODI 0 0 70 115 148 147 48 0
CDI 0 0 30 76 107 319 112 21
VCDI 0 0 15 66 147 491 3569 4150
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17630 7572 1090 532 246 159 28 0
OW 0 155 154 129 125 89 4 0
VODI 0 27 175 101 148 155 36 0
ODI 0 2 78 116 132 142 45 0
CDI 0 0 31 78 111 294 91 25
VCDI 0 0 20 63 144 500 3586 4146

Date: 2020-12-07:

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 17462 7427 618 458 167 132 29 0
OW 4 86 98 175 120 111 60 0
VODI 0 24 58 158 157 189 103 0
ODI 0 8 15 82 160 358 148 0
CDI 0 5 13 29 139 473 389 0
VCDI 0 0 9 17 57 390 4518 3713
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17466 7113 499 410 231 221 106 0
OW 0 277 88 120 83 101 91 0
VODI 0 128 148 168 124 249 152 0
ODI 0 13 40 104 113 229 154 0
CDI 0 17 16 81 137 358 225 0
VCDI 0 2 20 36 112 495 4519 3713

Date: 2020-12-09:

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 17141 7716 657 272 150 96 13 0
OW 0 103 127 150 137 89 24 0
VODI 0 24 66 122 241 165 47 0
ODI 0 6 24 62 153 246 141 0
CDI 0 5 11 41 175 503 389 0
VCDI 0 2 5 22 65 498 5086 3385
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 17138 7446 545 210 184 164 40 0
OW 3 265 141 104 118 126 51 0
VODI 0 109 104 140 160 165 127 0
ODI 0 23 57 94 166 213 217 0
CDI 0 5 32 81 183 319 251 0
VCDI 0 8 11 40 110 610 5014 3385

Date: 2020-12-11:

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 16914 7280 1051 464 173 50 6 0
OW 0 22 227 158 123 81 26 0
VODI 0 1 136 157 154 103 89 0
ODI 0 0 50 90 114 151 175 0
CDI 0 0 13 82 172 237 450 0
VCDI 0 0 0 17 114 560 5007 3712
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 16904 6925 813 404 162 113 60 0
OW 9 201 151 114 94 56 64 0
VODI 1 172 278 171 133 84 151 0
ODI 0 5 173 117 134 121 192 0
CDI 0 0 53 92 143 242 421 0
VCDI 0 0 9 70 184 566 4865 3712


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