Validation of sea ice concentration

Bulletin date: 2020-09-24

Model vs. observations, sea ice class contingency tables

Date: 2020-09-18:

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 24232 6901 843 430 90 13 0 0
OW 0 33 116 157 147 24 4 0
VODI 0 4 66 109 247 115 26 0
ODI 0 0 21 44 101 198 137 0
CDI 0 0 1 5 40 173 493 0
VCDI 0 0 0 1 11 58 1914 1405
...date precedes bulletin

Date: 2020-09-22:

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 24401 6911 920 340 35 14 0 0
OW 0 14 60 144 71 20 2 0
VODI 0 1 39 143 181 56 10 0
ODI 0 0 14 62 151 166 40 0
CDI 0 0 7 10 69 249 243 0
VCDI 0 0 2 6 33 95 1926 1724
...date precedes bulletin

Date: 2020-09-24:

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 24072 7005 981 325 42 27 1 0
OW 0 0 77 120 67 47 0 0
VODI 0 0 28 105 175 73 2 0
ODI 0 0 2 44 173 138 19 0
CDI 0 0 0 17 70 289 101 0
VCDI 0 0 0 5 30 194 2326 1604
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24072 7005 996 341 46 31 1 0
OW 0 0 66 103 58 35 0 0
VODI 0 0 24 104 177 75 1 0
ODI 0 0 2 38 161 139 31 0
CDI 0 0 0 19 88 275 118 0
VCDI 0 0 0 11 27 213 2298 1604

Date: 2020-09-28:

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 23725 6884 848 359 122 23 1 0
OW 0 1 12 74 83 55 7 0
VODI 0 0 5 24 112 118 8 0
ODI 0 0 1 15 90 236 26 0
CDI 0 0 0 0 117 366 203 0
VCDI 0 0 0 0 24 183 2420 2017
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 23725 6881 832 380 145 59 3 0
OW 0 3 23 58 104 68 9 0
VODI 0 1 4 23 122 212 24 0
ODI 0 0 5 3 51 172 47 0
CDI 0 0 2 8 84 238 165 0
VCDI 0 0 0 0 42 232 2417 2017

Date: 2020-09-30:

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 24151 6462 854 353 78 15 4 0
OW 0 0 32 81 68 54 2 0
VODI 0 0 11 57 59 107 19 0
ODI 0 0 3 33 61 122 73 0
CDI 0 0 1 58 65 166 161 0
VCDI 0 0 0 31 60 196 3002 1720
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24151 6462 850 367 88 25 4 0
OW 0 0 30 67 68 78 6 0
VODI 0 0 10 66 93 137 50 0
ODI 0 0 7 25 46 108 87 0
CDI 0 0 4 56 38 99 164 0
VCDI 0 0 0 32 58 213 2950 1720

Date: 2020-10-02:

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 24499 6264 565 366 75 33 8 0
OW 0 8 14 74 76 40 12 0
VODI 0 2 8 54 71 99 51 0
ODI 0 0 3 13 65 112 91 0
CDI 0 0 1 9 43 145 196 0
VCDI 0 0 0 1 19 303 3117 1722
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 24499 6249 537 358 83 22 8 0
OW 0 21 30 71 60 65 19 0
VODI 0 3 19 53 89 118 69 0
ODI 0 1 4 25 60 125 91 0
CDI 0 0 1 9 37 108 196 0
VCDI 0 0 0 1 20 294 3092 1722


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