Validation of sea ice concentration

Bulletin date: 2022-09-22

Model vs. observations, sea ice class contingency tables

Date: 2022-09-16:

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 24150 5298 818 347 144 28 0 0
OW 0 1 66 144 63 36 2 0
VODI 0 0 29 110 132 72 15 0
ODI 0 0 13 46 130 190 98 0
CDI 0 0 0 11 87 312 1597 686
VCDI 0 0 0 5 17 27 1226 2259
...date precedes bulletin

Date: 2022-09-20:

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 24038 5357 886 373 99 32 3 0
OW 0 4 115 75 53 34 4 0
VODI 0 0 89 82 111 68 67 0
ODI 0 0 22 47 78 166 258 0
CDI 0 0 4 2 28 117 1192 109
VCDI 0 0 11 2 11 18 1328 3276
...date precedes bulletin

Date: 2022-09-22:

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 23668 5526 1150 251 153 66 21 0
OW 0 0 87 47 59 53 17 0
VODI 0 0 42 66 76 156 50 0
ODI 0 0 17 24 46 217 151 0
CDI 0 0 2 7 46 175 593 8
VCDI 0 0 0 19 59 130 2170 3007
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 23668 5525 1134 257 175 91 28 0
OW 0 1 107 33 40 41 24 0
VODI 0 0 41 72 79 169 40 0
ODI 0 0 13 26 51 205 175 0
CDI 0 0 3 8 38 165 680 15
VCDI 0 0 0 18 56 126 2055 3000

Date: 2022-09-26:

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 24312 5876 717 372 31 6 3 0
OW 0 39 83 102 35 12 6 0
VODI 0 5 53 123 134 43 10 0
ODI 0 1 15 55 121 134 47 0
CDI 0 0 8 26 69 252 694 0
VCDI 0 0 0 9 46 83 1759 2878
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24312 5695 637 339 31 2 0 0
OW 0 106 70 81 21 15 6 0
VODI 0 80 58 95 77 28 14 0
ODI 0 30 56 77 91 117 43 0
CDI 0 9 44 61 145 186 277 0
VCDI 0 1 11 34 71 182 2179 2878

Date: 2022-09-28:

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 24165 5781 890 360 82 6 0 0
OW 0 15 78 110 49 27 0 0
VODI 0 7 30 71 123 69 4 0
ODI 0 5 11 45 123 92 37 0
CDI 0 0 21 48 100 260 586 0
VCDI 0 0 0 0 34 99 2593 2238
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24165 5647 767 297 66 0 0 0
OW 0 103 84 89 40 21 1 0
VODI 0 40 70 92 69 57 8 0
ODI 0 10 61 77 110 86 42 0
CDI 0 8 32 68 173 192 242 0
VCDI 0 0 16 11 53 197 2927 2238

Date: 2022-09-30:

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 24282 5641 801 331 73 11 0 0
OW 0 28 100 81 66 25 3 0
VODI 0 9 47 56 82 84 5 0
ODI 0 6 18 29 93 130 27 0
CDI 0 4 21 44 91 253 407 0
VCDI 0 0 4 24 38 163 2667 2415
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24282 5533 727 267 67 0 0 0
OW 0 80 68 78 45 21 1 0
VODI 0 53 73 80 66 63 8 0
ODI 0 10 65 34 65 106 32 0
CDI 0 9 37 84 151 275 215 0
VCDI 0 3 21 22 49 201 2853 2415


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