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: 2020-05-21

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

Model vs. observations, sea ice class contingency tables

Date: 2020-05-15:

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 0 172 13 46 136 32 1 0
OW 0 53 17 130 282 33 4 0
VODI 0 57 12 154 501 109 32 0
ODI 0 18 4 122 422 238 187 68
CDI 0 3 3 128 702 757 324 160
VCDI 0 0 0 35 791 2890 14732 22498
...date precedes bulletin

Date: 2020-05-17:

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 0 150 17 106 292 20 0 0
OW 0 75 15 161 297 33 5 0
VODI 0 93 18 132 502 115 50 0
ODI 0 30 5 120 417 266 268 0
CDI 0 13 6 152 857 1014 548 16
VCDI 0 0 0 59 680 2796 18124 18414
...date precedes bulletin

Date: 2020-05-19:

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 0 360 46 370 212 14 0 0
OW 0 120 8 315 305 20 2 0
VODI 0 104 9 154 569 116 8 0
ODI 0 36 3 96 540 323 35 0
CDI 0 17 1 102 1008 1743 341 0
VCDI 0 0 0 22 628 4586 16027 17626
...date precedes bulletin

Date: 2020-05-21:

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 0 547 44 350 169 12 0 0
OW 0 220 22 338 218 60 3 0
VODI 0 94 12 281 472 226 22 1
ODI 0 22 3 140 477 304 96 2
CDI 0 8 5 136 1221 1476 566 3
VCDI 0 0 1 27 358 4469 19618 13843
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 718 57 461 213 23 1 0
OW 0 107 12 298 206 61 1 0
VODI 0 42 10 239 461 253 25 0
ODI 0 18 3 122 521 309 96 3
CDI 0 5 4 131 1199 1469 539 3
VCDI 0 1 1 21 315 4432 19643 13843

Date: 2020-05-23:

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 0 707 69 476 125 12 0 0
OW 0 249 24 381 203 85 15 0
VODI 0 92 8 255 461 246 18 0
ODI 0 32 5 145 442 337 131 3
CDI 0 21 7 178 1151 1462 904 20
VCDI 0 0 0 28 238 4530 20744 12062
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 907 83 660 181 46 11 0
OW 0 98 13 267 208 82 3 0
VODI 0 54 6 201 414 267 17 0
ODI 0 24 5 138 503 348 116 1
CDI 0 18 6 176 1098 1395 921 19
VCDI 0 0 0 21 216 4534 20744 12065

Date: 2020-05-25:

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 0 914 76 393 106 1 0 0
OW 0 174 29 487 74 8 0 0
VODI 0 98 4 365 758 96 30 0
ODI 0 22 7 177 1015 609 29 0
CDI 0 2 0 80 675 2664 807 0
VCDI 0 0 0 6 75 4404 16894 14787
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 963 95 644 202 45 24 0
OW 0 91 8 269 237 120 18 0
VODI 0 94 4 193 507 331 18 0
ODI 0 41 4 170 675 483 90 0
CDI 0 20 5 206 926 2234 2069 7
VCDI 0 1 0 26 156 4569 15541 14780

Date: 2020-05-27:

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 0 1234 109 674 109 3 0 0
OW 0 138 19 437 313 17 1 0
VODI 0 64 5 198 836 230 63 0
ODI 0 16 6 154 771 509 117 0
CDI 0 10 3 86 750 2520 2092 1
VCDI 0 0 1 7 72 2753 14348 17200
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 1175 111 674 224 70 30 0
OW 0 118 9 250 254 154 34 0
VODI 0 107 8 229 451 378 90 0
ODI 0 42 8 190 706 436 220 0
CDI 0 18 6 187 1088 2353 3245 10
VCDI 0 2 1 26 128 2641 13002 17191

Date: 2020-05-29:

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 0 1540 115 791 189 5 0 0
OW 0 149 14 284 550 44 8 0
VODI 0 56 15 160 912 290 28 0
ODI 0 5 6 114 651 606 107 0
CDI 0 11 1 48 649 2792 2486 0
VCDI 0 4 0 6 33 1423 11060 20714
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 1475 115 668 334 105 17 0
OW 0 137 8 213 353 140 55 0
VODI 0 110 15 268 526 294 143 0
ODI 0 23 10 141 693 397 361 0
CDI 0 14 3 91 929 2943 3278 14
VCDI 0 6 0 22 149 1281 9835 20700


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