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

Validation of sea ice concentration - Full domain

Bulletin date: 2023-02-16

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

Model vs. observations, sea ice class contingency tables

Date: 2023-02-10:

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 53776 25212 7035 518 88 5 0 0
OW 59 537 173 290 190 21 0 0
VODI 2 345 229 303 287 72 1 0
ODI 0 162 103 261 357 148 17 0
CDI 0 142 94 224 502 512 144 0
VCDI 0 321 684 890 1902 8331 29857 53254
...date precedes bulletin

Date: 2023-02-12:

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 54172 27141 4392 646 139 24 3 0
OW 51 446 200 331 158 33 8 0
VODI 0 291 216 327 295 70 27 0
ODI 0 124 163 236 320 137 42 0
CDI 0 105 142 168 386 428 160 0
VCDI 0 322 779 994 1643 7297 32599 52033
...date precedes bulletin

Date: 2023-02-14:

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 55530 27031 3178 594 194 29 5 0
OW 51 349 233 411 167 24 2 0
VODI 0 160 172 359 424 93 2 0
ODI 0 43 109 256 394 237 24 0
CDI 0 45 64 228 500 611 277 2
VCDI 0 103 168 576 1333 5830 34722 52518
...date precedes bulletin

Date: 2023-02-16:

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 56782 25053 3594 663 154 44 5 0
OW 51 306 328 323 164 18 5 0
VODI 0 180 232 329 411 80 5 0
ODI 0 85 125 265 382 178 32 0
CDI 0 63 93 245 531 671 198 1
VCDI 0 177 297 719 1771 6423 33892 52173
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 56782 25067 3635 692 162 43 5 0
OW 51 292 297 306 167 17 4 0
VODI 0 182 237 311 393 79 5 0
ODI 0 87 109 270 390 169 28 0
CDI 0 62 90 224 527 681 205 1
VCDI 0 174 301 741 1774 6425 33890 52173

Date: 2023-02-18:

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 57882 22883 4589 507 178 23 7 0
OW 53 476 207 302 160 24 3 0
VODI 0 313 234 378 301 68 8 0
ODI 0 119 119 326 485 142 14 0
CDI 0 84 71 288 520 505 125 0
VCDI 0 346 260 973 2018 6752 31085 54220
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 57881 22855 4582 536 214 28 7 0
OW 54 499 218 279 138 23 5 0
VODI 0 312 220 354 313 61 6 0
ODI 0 125 118 334 454 153 11 0
CDI 0 80 74 275 563 559 145 0
VCDI 0 350 268 996 1980 6690 31068 54220

Date: 2023-02-20:

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 56598 26913 1542 562 119 51 13 0
OW 52 288 252 443 158 36 8 0
VODI 0 206 206 590 397 75 11 0
ODI 0 63 114 370 715 244 11 0
CDI 0 77 40 198 878 705 145 11
VCDI 0 95 116 377 1234 6787 30211 56137
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 56598 26637 1449 611 183 76 15 0
OW 52 396 244 315 197 38 12 0
VODI 0 216 212 426 331 120 10 0
ODI 0 119 142 323 420 172 27 0
CDI 0 79 52 305 719 595 233 13
VCDI 0 195 171 560 1651 6897 30102 56135

Date: 2023-02-22:

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 58972 23409 2394 689 120 18 25 0
OW 52 301 221 377 225 9 7 0
VODI 0 144 164 504 413 76 10 0
ODI 0 38 89 332 569 178 62 0
CDI 0 16 57 231 782 517 234 8
VCDI 0 21 61 309 1486 6269 31805 55854
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 58972 23083 2319 754 265 43 28 0
OW 52 422 200 310 190 45 7 0
VODI 0 219 166 360 387 98 32 0
ODI 0 119 92 284 461 252 79 0
CDI 0 41 100 279 674 642 325 2
VCDI 0 45 109 455 1618 5987 31672 55860

Date: 2023-02-24:

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 52023 26212 6355 754 191 17 7 0
OW 52 378 259 290 166 18 2 0
VODI 0 219 230 350 297 63 35 0
ODI 0 97 113 332 355 122 38 0
CDI 0 90 65 256 662 545 277 1
VCDI 0 166 126 414 1834 7759 39993 45885
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 52023 25665 6285 764 283 46 7 0
OW 52 595 214 247 231 35 3 0
VODI 0 343 235 278 316 105 31 0
ODI 0 162 138 279 283 187 62 0
CDI 0 134 87 257 531 548 287 14
VCDI 0 263 189 571 1861 7603 39962 45872


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