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

Validation of sea ice concentration - European sector

Bulletin date: 2023-04-27

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

Model vs. observations, sea ice class contingency tables

Date: 2023-04-21:

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 60725 20030 3795 1015 250 81 38 0
OW 51 288 179 306 279 99 27 0
VODI 0 152 90 250 311 209 103 0
ODI 0 48 40 162 276 326 192 0
CDI 0 32 18 122 415 832 652 0
VCDI 0 13 17 92 561 4154 8664 4206
...date precedes bulletin

Date: 2023-04-23:

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 60355 21293 2677 1057 389 93 60 0
OW 51 214 161 344 288 151 37 0
VODI 0 116 128 228 281 289 106 0
ODI 0 36 33 156 252 372 205 0
CDI 0 21 14 130 374 1117 846 0
VCDI 0 9 29 128 518 3633 8204 4705
...date precedes bulletin

Date: 2023-04-25:

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 67622 16462 507 841 480 189 73 0
OW 59 206 73 268 354 158 34 0
VODI 0 120 41 217 336 316 130 0
ODI 0 47 33 89 329 401 237 0
CDI 0 33 20 105 379 896 859 0
VCDI 0 13 23 96 531 3516 7903 5104
...date precedes bulletin

Date: 2023-04-27:

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 67344 16861 498 798 487 197 62 0
OW 59 207 95 304 345 149 23 0
VODI 0 107 39 251 408 302 113 0
ODI 0 52 30 116 317 405 196 0
CDI 0 37 14 85 359 1067 792 0
VCDI 0 26 27 124 333 3032 8216 5223
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67344 16887 514 836 534 211 64 0
OW 59 190 90 264 312 139 28 0
VODI 0 97 36 264 379 313 104 0
ODI 0 56 20 106 334 394 200 0
CDI 0 33 17 86 356 1070 793 0
VCDI 0 27 26 122 334 3025 8213 5223

Date: 2023-04-29:

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 68038 16609 463 666 443 233 68 0
OW 74 232 105 293 292 180 58 0
VODI 0 129 58 202 362 271 153 0
ODI 0 53 24 88 309 338 226 0
CDI 0 38 20 112 322 947 775 0
VCDI 0 23 21 93 453 3377 8000 4952
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68038 16653 474 683 486 253 67 0
OW 74 207 95 275 271 165 61 0
VODI 0 111 63 209 347 270 159 0
ODI 0 55 17 88 306 343 220 0
CDI 0 35 22 107 336 985 800 0
VCDI 0 23 20 92 435 3330 7973 4952

Date: 2023-05-01:

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 67882 17046 400 534 321 165 32 0
OW 73 249 135 275 245 97 26 0
VODI 0 101 69 236 322 185 54 0
ODI 0 27 20 143 420 321 82 0
CDI 0 5 6 93 555 2293 892 0
VCDI 0 0 0 24 164 2545 7959 5104
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67882 16897 416 654 540 293 67 0
OW 73 263 107 191 231 184 89 0
VODI 0 132 59 188 292 279 182 0
ODI 0 75 18 88 264 347 253 0
CDI 0 40 18 99 296 1133 945 0
VCDI 0 21 12 85 404 3370 7509 5104

Date: 2023-05-03:

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 67935 16847 454 676 481 158 32 0
OW 91 129 99 252 271 85 30 0
VODI 6 39 42 213 389 243 43 0
ODI 0 10 23 180 412 400 102 0
CDI 0 13 15 97 605 2187 753 0
VCDI 0 0 3 27 240 3069 6591 5858
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67907 16686 449 757 638 237 74 0
OW 82 207 76 228 266 189 81 0
VODI 17 98 45 166 412 330 151 0
ODI 20 23 36 145 346 333 201 0
CDI 6 16 16 111 375 1178 565 0
VCDI 0 8 14 38 361 3875 6479 5858

Date: 2023-05-05:

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 67915 16589 509 846 524 183 45 0
OW 84 64 68 296 328 136 24 0
VODI 0 21 22 226 428 316 79 0
ODI 0 16 22 145 433 378 217 0
CDI 0 0 0 58 689 2309 1066 0
VCDI 0 0 0 22 183 2635 6342 5882
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67867 16467 476 904 672 275 93 0
OW 93 152 75 229 308 226 101 0
VODI 15 38 45 234 408 330 216 0
ODI 23 24 13 139 304 327 264 0
CDI 1 2 4 55 484 1291 824 0
VCDI 0 7 8 32 409 3508 6275 5882


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