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: 2023-04-27

Data source: OSI SAF N.H. AMSR 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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 1 3 13 6 1 0 0
ODI 0 0 16 53 12 19 12 0
CDI 0 4 13 64 90 140 186 7
VCDI 0 1 5 81 510 1022 10834 32773
...date precedes bulletin

Date: 2023-04-23:

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 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 1 1 2 0 4 0 0
ODI 0 1 12 41 23 22 9 0
CDI 0 1 12 69 136 246 243 4
VCDI 0 1 4 46 253 1540 12666 30529
...date precedes bulletin

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 0 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 0 0
VODI 0 12 1 0 0 0 7 0
ODI 0 12 6 15 25 22 40 0
CDI 0 5 10 66 156 257 391 4
VCDI 0 2 7 69 373 1774 13766 28846
...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 0 0 0 0 0 0 0 0
OW 0 3 0 0 0 0 0 0
VODI 0 12 0 1 1 6 7 0
ODI 0 11 11 12 14 40 48 0
CDI 0 8 13 70 151 300 323 4
VCDI 0 3 7 92 434 2067 15559 26669
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 4 0 0 0 0 0 0
VODI 0 14 1 1 1 6 13 0
ODI 0 12 11 16 14 47 48 1
CDI 0 3 11 83 195 303 298 3
VCDI 0 4 8 75 390 2057 15578 26669

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 0 0 0 0 0 0 0 0
OW 0 4 0 0 1 5 0 0
VODI 0 11 1 1 15 6 5 0
ODI 0 6 8 6 38 31 40 0
CDI 0 4 8 74 205 252 377 0
VCDI 0 11 14 141 670 1913 16535 25484
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 1 0 0 0 0 0 0
OW 0 4 0 0 1 5 0 0
VODI 0 11 1 1 12 7 6 0
ODI 0 6 9 10 42 34 55 0
CDI 0 2 5 91 272 268 363 0
VCDI 0 12 16 120 602 1893 16533 25484

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 0 0 0 0 0 0 0 0
OW 0 13 0 0 0 1 0 0
VODI 0 21 10 20 15 6 0 0
ODI 0 15 11 64 83 34 11 0
CDI 0 20 16 124 434 647 247 0
VCDI 0 185 24 160 383 1463 15257 26602
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 1 3 0 0
VODI 0 12 1 0 15 10 9 0
ODI 0 12 13 28 32 53 65 0
CDI 0 25 12 129 316 362 367 0
VCDI 0 202 35 211 551 1723 15074 26602

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 0 8 0 0 0 0 0 0
OW 0 20 6 2 6 0 0 0
VODI 0 25 14 24 31 10 9 0
ODI 0 21 15 89 96 53 39 0
CDI 0 33 25 173 474 552 376 11
VCDI 0 78 36 161 568 2238 17569 23104
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 8 0 9 0
VODI 0 24 5 7 32 20 37 0
ODI 0 21 21 58 81 72 69 0
CDI 0 29 25 171 386 417 349 11
VCDI 0 108 45 213 668 2344 17529 23104

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 0 8 1 0 0 0 0 0
OW 0 17 7 7 5 0 0 0
VODI 0 30 13 36 29 11 20 0
ODI 0 20 17 92 106 79 45 0
CDI 0 21 26 141 506 631 541 0
VCDI 0 39 21 181 493 2544 18875 21304
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 0 2 0 0 1 0 5 0
OW 0 7 5 6 12 9 23 0
VODI 0 28 15 38 43 54 57 0
ODI 0 27 12 76 84 88 65 0
CDI 0 21 16 107 336 373 438 60
VCDI 0 50 37 230 663 2741 18893 21244


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