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: 2023-09-14

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

Model vs. observations, sea ice class contingency tables

Date: 2023-09-08:

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 20464 6799 90 58 6 0 0 0
OW 8 2094 270 196 1 0 0 0
VODI 0 503 285 858 153 9 0 0
ODI 0 31 86 1260 1469 308 0 0
CDI 0 0 2 254 1154 6843 657 0
VCDI 0 2 0 0 3 1915 88 0
...date precedes bulletin

Date: 2023-09-10:

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 20602 6547 119 76 0 0 0 0
OW 46 2066 252 260 6 0 0 0
VODI 0 494 256 827 260 19 0 0
ODI 0 44 49 707 1979 229 6 0
CDI 0 0 0 210 1367 5379 295 0
VCDI 0 0 1 1 41 2993 735 0
...date precedes bulletin

Date: 2023-09-12:

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 20664 7810 147 82 1 0 0 0
OW 1 1328 317 345 17 0 0 0
VODI 0 141 158 860 556 53 0 0
ODI 0 5 4 312 1997 858 0 0
CDI 0 0 1 10 568 5465 632 0
VCDI 0 0 0 3 6 2746 779 0
...date precedes bulletin

Date: 2023-09-14:

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 21982 6863 90 64 3 0 0 0
OW 22 1417 228 200 28 5 0 0
VODI 0 236 222 782 359 57 0 0
ODI 0 14 33 411 1650 1108 32 0
CDI 0 0 0 150 633 3418 1589 0
VCDI 0 0 0 4 7 2675 1584 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 21984 6855 115 66 4 0 0 0
OW 20 1446 218 216 26 4 0 0
VODI 0 221 212 795 382 64 0 0
ODI 0 8 28 398 1623 1089 44 0
CDI 0 0 0 132 616 3381 1572 0
VCDI 0 0 0 4 29 2725 1589 0

Date: 2023-09-16:

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 23227 5849 43 11 0 0 0 0
OW 27 1420 218 156 15 5 0 0
VODI 0 284 256 825 253 68 3 0
ODI 0 15 50 572 1467 1198 20 0
CDI 0 0 2 235 588 2747 1278 0
VCDI 0 0 0 0 10 2164 2860 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 23236 5872 68 20 0 0 0 0
OW 18 1398 215 190 17 6 0 0
VODI 0 288 234 849 266 76 3 0
ODI 0 10 50 516 1412 1183 32 0
CDI 0 0 2 224 613 2707 1367 0
VCDI 0 0 0 0 25 2210 2759 0

Date: 2023-09-18:

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 23297 6347 79 28 0 0 0 0
OW 17 1002 221 123 5 0 0 0
VODI 0 125 248 1027 148 2 0 0
ODI 0 1 5 569 1631 118 10 0
CDI 0 3 1 11 913 3212 82 0
VCDI 0 0 0 1 3 3103 3534 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 23295 5762 83 35 0 0 0 0
OW 19 1338 221 216 19 1 0 0
VODI 0 356 208 860 305 37 6 0
ODI 0 20 40 408 1716 940 25 0
CDI 0 2 2 238 650 2601 975 0
VCDI 0 0 0 2 10 2856 2620 0

Date: 2023-09-20:

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 22677 6758 177 93 0 0 0 0
OW 33 953 242 211 5 0 0 0
VODI 0 191 222 897 256 21 0 0
ODI 0 5 22 492 1567 348 2 0
CDI 0 3 3 21 770 3484 357 0
VCDI 0 0 0 0 3 3424 2629 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 22670 6177 139 74 0 0 0 0
OW 40 1287 243 298 17 0 0 0
VODI 0 429 244 723 358 70 3 0
ODI 0 15 37 455 1633 1193 44 0
CDI 0 2 3 164 592 2650 940 0
VCDI 0 0 0 0 1 3364 2001 0

Date: 2023-09-22:

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 23024 6294 69 27 0 0 0 0
OW 38 1044 237 207 4 0 0 0
VODI 0 177 235 874 331 17 0 0
ODI 0 4 23 481 1352 407 14 0
CDI 0 10 2 33 563 3466 649 0
VCDI 0 0 0 0 2 2374 3908 0
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 23019 5823 68 34 0 0 0 0
OW 43 1292 245 266 28 0 0 0
VODI 0 379 207 650 384 81 5 0
ODI 0 30 38 452 1096 749 49 0
CDI 0 5 8 220 743 3285 1286 0
VCDI 0 0 0 0 1 2149 3231 0


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