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

Validation of sea ice concentration - American sector

Bulletin date: 2020-10-22

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

Model vs. observations, sea ice class contingency tables

Date: 2020-10-16:

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 14009 6622 88 644 163 5 0 0
OW 0 333 29 377 308 29 0 0
VODI 0 246 30 193 419 119 0 0
ODI 0 26 8 121 399 274 5 0
CDI 0 0 1 51 189 774 313 0
VCDI 0 0 0 3 246 1384 9704 8754
...date precedes bulletin

Date: 2020-10-18:

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 14895 5266 78 390 193 38 0 0
OW 1 425 51 329 356 56 0 0
VODI 0 103 22 225 543 180 2 0
ODI 0 34 5 76 271 362 20 0
CDI 0 4 3 39 130 662 122 0
VCDI 0 0 0 7 150 1468 10613 8747
...date precedes bulletin

Date: 2020-10-20:

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 13543 6701 65 238 71 0 0 0
OW 0 279 38 296 76 8 0 0
VODI 0 49 13 446 384 37 0 0
ODI 0 3 3 77 878 100 0 0
CDI 0 0 0 6 355 818 8 0
VCDI 0 0 0 0 65 1711 7042 12556
...date precedes bulletin

Date: 2020-10-22:

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 14064 5891 45 188 60 0 0 0
OW 1 566 41 250 106 2 0 0
VODI 0 115 26 499 218 41 0 0
ODI 0 1 0 86 765 92 0 0
CDI 0 0 0 14 653 388 0 0
VCDI 0 0 0 0 139 2961 5970 12684
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 14053 6097 48 227 99 0 0 0
OW 12 407 45 230 79 9 0 0
VODI 0 69 19 469 222 35 0 0
ODI 0 0 0 98 562 85 0 0
CDI 0 0 0 13 720 344 0 0
VCDI 0 0 0 0 259 3011 5970 12684

Date: 2020-10-24:

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 13664 5680 56 276 47 0 0 0
OW 45 529 49 432 176 11 0 0
VODI 0 55 24 316 586 53 0 0
ODI 0 0 0 47 543 322 0 0
CDI 0 0 0 14 362 735 16 0
VCDI 0 0 0 0 167 3026 6350 12285
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 13657 5761 66 335 86 2 0 0
OW 52 465 49 399 146 15 0 0
VODI 0 38 14 294 592 61 0 0
ODI 0 0 0 44 457 205 0 0
CDI 0 0 0 13 395 670 23 0
VCDI 0 0 0 0 205 3194 6343 12285

Date: 2020-10-26:

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 12025 7005 105 490 66 0 0 0
OW 0 111 38 372 112 2 0 0
VODI 0 9 6 261 395 12 0 0
ODI 0 0 0 30 831 140 0 0
CDI 0 0 0 0 190 1484 33 0
VCDI 0 0 0 0 29 1170 6151 14799
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12025 6651 87 464 131 2 0 0
OW 0 439 49 350 239 29 0 0
VODI 0 35 13 317 729 219 2 0
ODI 0 0 0 21 225 386 14 0
CDI 0 0 0 1 176 672 165 0
VCDI 0 0 0 0 123 1500 6003 14799

Date: 2020-10-28:

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 12020 6154 107 602 240 3 0 0
OW 0 82 19 403 365 24 0 0
VODI 0 8 11 217 400 124 0 0
ODI 0 0 1 45 371 318 0 0
CDI 0 0 0 5 196 960 78 0
VCDI 0 0 0 0 48 1515 4768 16782
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 12015 5779 86 475 258 18 0 0
OW 5 398 35 372 229 50 0 0
VODI 0 67 17 370 652 313 8 0
ODI 0 0 0 54 298 436 43 0
CDI 0 0 0 1 147 542 136 1
VCDI 0 0 0 0 36 1585 4659 16781

Date: 2020-10-30:

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 11233 5491 109 722 309 21 0 0
OW 7 57 13 460 723 108 4 0
VODI 0 10 2 66 586 425 6 0
ODI 0 0 0 32 166 425 64 0
CDI 0 0 0 21 109 530 311 0
VCDI 0 0 0 0 76 947 4907 17926
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 11210 5198 75 442 144 46 3 0
OW 21 295 34 519 552 88 2 0
VODI 9 62 14 291 917 373 9 0
ODI 0 3 1 30 181 652 37 0
CDI 0 0 0 19 130 491 265 14
VCDI 0 0 0 0 45 806 4976 17912


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