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: 2023-05-04

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

Model vs. observations, sea ice class contingency tables

Date: 2023-04-28:

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 0 0 0 0 0 0 0 0
OW 0 5 0 0 0 2 0 0
VODI 0 13 0 1 4 12 4 0
ODI 0 11 5 13 29 34 47 0
CDI 0 4 13 77 195 279 331 0
VCDI 0 2 12 112 528 2122 16319 25692
...date precedes bulletin

Date: 2023-04-30:

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 0 0 0 0 0 0 0 0
OW 0 3 0 0 3 0 0 0
VODI 0 11 0 1 13 6 4 0
ODI 0 5 7 5 30 32 52 0
CDI 0 6 16 92 212 288 458 0
VCDI 0 3 9 100 434 1625 18629 23822
...date precedes bulletin

Date: 2023-05-02:

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 4 0 0 0 0 0 0
OW 0 21 4 1 7 0 0 0
VODI 0 18 15 26 26 5 0 0
ODI 0 17 12 78 103 43 21 0
CDI 0 15 10 155 532 593 230 7
VCDI 0 263 37 253 668 1805 15861 25036
...date precedes bulletin

Date: 2023-05-04:

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 7 0 0 0 0 0 0
OW 0 23 7 4 5 0 1 0
VODI 0 31 14 30 26 11 18 0
ODI 0 26 27 98 100 62 51 0
CDI 0 22 16 151 451 590 448 3
VCDI 0 39 44 199 469 2238 18720 21935
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 9 0 0 2 0 0 0
OW 0 22 2 2 9 1 0 0
VODI 0 29 19 35 25 9 17 0
ODI 0 30 27 95 116 60 52 0
CDI 0 19 16 152 428 605 471 1
VCDI 0 39 44 198 471 2226 18698 21937

Date: 2023-05-06:

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 6 0 0 0 0 0 0
OW 0 20 3 8 1 0 0 0
VODI 0 23 21 40 33 18 17 0
ODI 0 20 10 83 138 138 36 0
CDI 0 28 22 135 368 564 715 0
VCDI 0 55 39 142 497 2806 18077 21803
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 5 0 0 0 0 0 0
OW 0 21 2 4 4 0 0 0
VODI 0 24 21 39 29 13 15 0
ODI 0 22 14 99 142 137 39 0
CDI 0 24 19 121 375 609 733 0
VCDI 0 56 39 145 487 2767 18058 21803

Date: 2023-05-08:

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 0 20 1 0 0 0 0 0
OW 0 79 16 15 5 0 0 0
VODI 0 49 41 89 69 14 1 0
ODI 0 33 36 91 201 122 16 0
CDI 0 76 55 185 380 694 418 4
VCDI 0 33 20 175 432 2733 20892 18871
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 6 0 0 0 0 0 0
OW 0 48 4 6 8 1 0 0
VODI 0 40 27 51 63 25 5 0
ODI 0 41 26 80 134 161 52 0
CDI 0 65 44 158 307 527 822 1
VCDI 0 90 68 260 575 2849 20448 18874

Date: 2023-05-10:

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 0 41 12 12 3 0 0 0
OW 0 39 14 35 13 3 0 0
VODI 0 46 44 62 94 24 1 0
ODI 0 25 28 79 175 166 22 0
CDI 0 56 39 170 428 744 648 1
VCDI 0 43 51 234 326 3039 20507 18642
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 10 2 2 2 0 0 0
OW 0 22 6 10 17 12 0 0
VODI 0 37 29 56 73 30 6 0
ODI 0 40 26 92 158 181 68 0
CDI 0 56 45 130 349 654 1133 1
VCDI 0 85 80 302 440 3099 19971 18642

Date: 2023-05-12:

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 0 32 10 31 4 0 0 0
OW 0 33 7 45 37 6 0 0
VODI 0 71 29 63 107 34 1 0
ODI 0 16 36 116 179 242 34 0
CDI 0 126 33 183 487 947 607 0
VCDI 0 112 52 340 603 4024 17564 19655
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 10 3 10 14 5 0 0
OW 0 28 3 27 28 3 1 0
VODI 0 46 22 64 90 52 5 0
ODI 0 63 21 111 151 217 33 0
CDI 0 93 30 170 506 1070 1032 0
VCDI 0 150 88 396 628 3906 17135 19655


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