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

Validation of sea ice concentration - European sector

Bulletin date: 2023-04-27

Data source: OSI SAF N.H. 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 67654 15948 671 1251 355 34 21 0
OW 60 241 73 417 402 32 4 0
VODI 0 115 50 252 554 141 3 0
ODI 0 21 24 114 507 351 27 0
CDI 0 13 2 125 480 949 499 3
VCDI 0 8 0 32 505 4006 7628 5528
...date precedes bulletin

Date: 2023-04-23:

Best estimate Forecast
...observations not yet available ...observations not yet available

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 67393 16090 689 1378 506 102 16 0
OW 59 113 75 363 461 80 1 0
VODI 0 59 33 243 562 241 22 0
ODI 0 26 20 119 449 455 67 0
CDI 0 13 2 101 469 1124 583 0
VCDI 0 1 0 59 669 3744 6630 6083
...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 67235 16294 682 1432 467 130 7 0
OW 59 124 67 388 459 84 1 0
VODI 0 48 38 236 639 211 48 0
ODI 0 17 24 119 502 372 82 0
CDI 0 12 3 100 435 1209 595 0
VCDI 0 0 0 98 572 3205 7446 5660
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67235 16317 691 1474 521 145 7 0
OW 59 105 64 354 423 67 10 0
VODI 0 44 32 250 609 220 38 0
ODI 0 17 25 102 517 362 87 0
CDI 0 12 2 99 428 1222 592 0
VCDI 0 0 0 94 576 3195 7445 5660

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 67688 16217 711 1285 478 137 4 0
OW 74 156 62 421 389 131 1 0
VODI 0 79 56 231 507 250 52 0
ODI 0 19 20 120 382 411 86 0
CDI 0 22 2 120 407 1123 540 0
VCDI 0 0 0 80 680 3624 6979 5556
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 67688 16250 710 1334 516 152 4 0
OW 74 134 68 378 376 111 7 0
VODI 0 67 55 240 491 260 46 0
ODI 0 20 16 120 377 413 83 0
CDI 0 22 2 108 419 1182 552 0
VCDI 0 0 0 77 664 3558 6970 5556

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 68304 16022 649 1011 305 89 0 0
OW 93 71 98 527 264 47 0 0
VODI 13 12 25 340 469 108 0 0
ODI 0 6 0 112 693 189 13 0
CDI 0 0 0 59 680 2622 483 0
VCDI 0 0 0 4 175 2781 6954 5882
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68285 15860 637 1214 575 178 0 0
OW 95 132 70 351 325 143 22 0
VODI 13 73 34 231 412 307 62 0
ODI 15 31 18 91 371 393 126 0
CDI 2 11 13 79 390 1204 832 0
VCDI 0 4 0 87 513 3611 6408 5882

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 68143 15907 697 1315 456 65 0 0
OW 91 28 48 415 327 47 1 0
VODI 6 5 11 234 591 116 12 0
ODI 0 2 1 98 728 264 34 0
CDI 0 0 1 47 786 2438 398 0
VCDI 0 0 0 3 252 3551 5723 6259
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68117 15774 639 1392 694 121 11 0
OW 82 128 64 319 373 131 32 0
VODI 15 37 44 175 590 301 57 0
ODI 20 3 11 107 536 324 103 0
CDI 6 0 0 92 496 1281 392 0
VCDI 0 0 0 27 451 4323 5573 6259

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 68339 15524 710 1528 438 72 0 0
OW 84 14 41 408 416 37 0 0
VODI 0 0 6 223 697 163 3 0
ODI 0 0 0 99 692 372 48 0
CDI 0 0 0 16 741 2732 633 0
VCDI 0 0 0 0 181 2806 6092 5985
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 68291 15440 673 1513 698 130 9 0
OW 93 85 62 345 441 127 31 0
VODI 15 13 19 264 583 312 80 0
ODI 23 0 3 99 492 322 155 0
CDI 1 0 0 30 580 1560 490 0
VCDI 0 0 0 23 371 3731 6011 5985


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