Validation of sea ice concentration

Bulletin date: 2022-08-18

Model vs. observations, sea ice class contingency tables

Date: 2022-08-12:

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 20931 8262 1539 315 117 99 17 0
OW 0 0 96 74 62 42 26 0
VODI 0 0 39 81 124 117 107 0
ODI 0 0 5 35 59 108 416 4
CDI 0 0 0 42 55 88 2334 1687
VCDI 0 0 0 0 3 4 658 613
...date precedes bulletin

Date: 2022-08-16:

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 21374 8251 1104 227 169 112 15 0
OW 0 6 56 73 68 28 26 0
VODI 0 0 32 84 123 107 84 0
ODI 0 0 7 66 68 136 375 0
CDI 0 0 0 37 73 113 2255 832
VCDI 0 0 0 0 0 0 938 1320
...date precedes bulletin

Date: 2022-08-18:

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 21747 8012 1087 190 146 112 19 0
OW 0 14 76 64 82 42 18 0
VODI 0 0 68 64 128 104 86 0
ODI 0 0 22 45 59 141 329 0
CDI 0 0 9 40 94 140 2176 945
VCDI 0 0 0 0 1 1 972 1126
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 21747 8015 1088 201 159 121 21 0
OW 0 11 73 54 77 38 18 0
VODI 0 0 71 66 114 94 68 0
ODI 0 0 23 50 67 134 397 0
CDI 0 0 7 32 88 144 2110 779
VCDI 0 0 0 0 5 9 986 1292

Date: 2022-08-22:

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 24305 5594 918 322 142 13 4 0
OW 0 16 78 117 73 11 5 0
VODI 0 0 29 149 119 65 30 0
ODI 0 0 3 42 125 269 252 0
CDI 0 0 0 20 81 98 1765 1047
VCDI 0 0 0 4 15 54 1300 1094
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24305 5571 911 313 154 20 4 0
OW 0 25 65 105 95 20 6 0
VODI 0 13 33 130 90 83 37 0
ODI 0 1 19 69 91 167 233 0
CDI 0 0 0 36 110 211 2058 1128
VCDI 0 0 0 1 15 9 1018 1013

Date: 2022-08-24:

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 24350 5600 749 375 146 23 7 0
OW 0 6 50 134 90 28 8 0
VODI 0 0 12 115 161 62 37 0
ODI 0 0 3 43 135 247 192 0
CDI 0 0 0 20 93 194 1766 1098
VCDI 0 0 0 6 15 55 1272 1067
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24350 5574 738 361 167 37 7 0
OW 0 26 44 103 89 31 10 0
VODI 0 6 23 118 126 64 33 0
ODI 0 0 9 72 114 178 214 0
CDI 0 0 0 37 128 266 1865 1153
VCDI 0 0 0 2 16 33 1153 1012

Date: 2022-08-26:

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 24060 5495 963 398 171 41 8 0
OW 0 1 22 149 117 32 10 0
VODI 0 0 3 64 172 93 39 0
ODI 0 0 0 8 98 300 197 0
CDI 0 0 0 17 74 226 1871 965
VCDI 0 0 0 6 14 53 1234 1258
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24060 5495 936 392 191 73 13 0
OW 0 1 33 111 104 40 21 0
VODI 0 0 18 88 131 77 41 0
ODI 0 0 1 26 107 218 229 1
CDI 0 0 0 23 98 303 1924 1244
VCDI 0 0 0 2 15 34 1131 978


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