Description of algorithm
Full domain
American sector
  Ice concntr, edge pos
  Contingency tables
European sector
Asian sector

Validation of sea ice concentration - American sector

Bulletin date: 2023-09-07

Data source: OSI SAF N.H. AMSR sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2023-09-01:

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 10344 0 15349 44 0 0 0 0
OW 1 0 3297 113 0 0 0 0
VODI 0 0 2879 156 59 0 0 0
ODI 0 0 1943 1032 1075 51 0 0
CDI 0 0 2878 1607 1023 54 0 0
VCDI 0 0 3528 433 0 0 0 0
...date precedes bulletin

Date: 2023-09-03:

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 18049 7739 151 83 6 0 0 0
OW 8 2544 376 300 3 0 0 0
VODI 0 606 540 1629 282 14 0 0
ODI 0 16 16 613 2522 771 14 0
CDI 0 3 0 21 807 4266 637 0
VCDI 0 3 0 0 4 2660 1183 0
...date precedes bulletin

Date: 2023-09-05:

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 19983 7478 95 45 0 0 0 0
OW 8 1910 444 211 3 0 0 0
VODI 0 213 279 884 272 14 0 0
ODI 0 17 22 516 1961 399 0 0
CDI 0 4 1 74 1293 6738 369 0
VCDI 0 0 0 0 0 1756 877 0
...date precedes bulletin

Date: 2023-09-07:

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 20434 6985 79 44 3 0 0 0
OW 9 1985 326 199 18 0 0 0
VODI 0 412 273 786 214 16 0 0
ODI 0 41 80 872 1723 337 0 0
CDI 0 1 1 145 1608 6797 220 0
VCDI 0 2 0 0 5 1911 340 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 20325 6268 79 46 5 0 0 0
OW 118 2223 229 178 30 3 0 0
VODI 0 897 427 1114 376 10 0 0
ODI 0 35 20 616 2137 807 18 0
CDI 0 0 4 89 1013 6624 251 0
VCDI 0 3 0 3 10 1617 291 0

Date: 2023-09-09:

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 20934 6298 65 26 0 0 0 0
OW 3 2212 253 138 3 0 0 0
VODI 0 550 297 844 154 0 0 0
ODI 0 47 96 1274 1464 193 0 0
CDI 0 0 3 238 1372 5924 488 0
VCDI 0 0 1 1 31 2399 558 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 20873 5656 60 29 3 0 0 0
OW 64 2424 216 172 1 0 0 0
VODI 0 1006 402 1287 215 6 0 0
ODI 0 21 29 930 1848 653 11 0
CDI 0 0 7 102 923 5837 512 0
VCDI 0 0 1 1 34 2020 523 0

Date: 2023-09-11:

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 20796 7535 142 53 0 0 0 0
OW 1 1545 307 221 4 0 0 0
VODI 0 113 192 1283 185 13 0 0
ODI 0 3 3 354 2502 297 0 0
CDI 0 0 1 8 557 6176 101 0
VCDI 0 0 1 4 1 2604 864 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 20674 6018 87 32 0 0 0 0
OW 123 2224 239 283 26 0 0 0
VODI 0 906 272 984 508 161 4 0
ODI 0 48 43 544 1732 858 79 0
CDI 0 0 4 76 947 4891 343 0
VCDI 0 0 1 4 36 3180 539 0

Date: 2023-09-13:

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 21292 7378 103 80 19 0 0 0
OW 24 1358 281 261 28 0 0 0
VODI 0 179 170 849 460 63 0 0
ODI 0 6 9 340 1845 980 22 0
CDI 0 0 0 38 635 4010 1457 0
VCDI 0 0 0 4 4 2832 1139 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 21223 5514 79 80 12 0 0 0
OW 93 2364 187 159 57 33 0 0
VODI 0 990 247 978 451 111 3 0
ODI 0 50 42 305 1605 1113 207 0
CDI 0 3 8 45 854 3891 1959 0
VCDI 0 0 0 5 12 2737 449 0

Date: 2023-09-15:

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 21979 6978 75 45 5 0 0 0
OW 31 1376 255 146 52 10 0 0
VODI 0 263 223 774 325 77 3 0
ODI 0 12 39 412 1638 1139 12 0
CDI 0 0 0 152 582 3509 1207 0
VCDI 0 0 0 0 6 2643 1898 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 21864 5108 56 23 1 0 0 0
OW 146 2259 173 123 63 52 3 0
VODI 0 1190 273 757 403 97 2 0
ODI 0 56 74 498 1149 1246 134 0
CDI 0 16 16 128 985 3599 2194 0
VCDI 0 0 0 0 7 2384 787 0


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