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: 2022-04-21

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

Model vs. observations, sea ice class contingency tables

Date: 2022-04-15:

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 0 0 0 0 0 0 0
OW 0 0 0 0 2 0 0 0
VODI 0 0 0 0 39 40 0 0
ODI 0 0 0 0 116 102 13 0
CDI 0 0 0 0 201 327 110 0
VCDI 0 0 0 0 348 1636 10786 32146
...date precedes bulletin

Date: 2022-04-17:

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 0 0 0 0 0 0 0
OW 0 0 0 5 1 0 0 0
VODI 0 0 0 22 20 27 0 0
ODI 0 0 0 2 79 112 4 0
CDI 0 0 0 3 161 323 120 0
VCDI 0 0 0 0 310 1730 10119 32828
...date precedes bulletin

Date: 2022-04-19:

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 0 0 0 0 0 0 0
OW 0 0 0 0 0 0 4 0
VODI 0 0 0 0 9 21 16 0
ODI 0 0 0 0 31 67 19 0
CDI 0 0 0 0 61 414 197 104
VCDI 0 0 0 0 28 1600 10030 33265
...date precedes bulletin

Date: 2022-04-21:

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 2 0 4 0
VODI 0 0 0 0 12 9 22 0
ODI 0 0 0 0 38 30 15 0
CDI 0 0 0 0 99 215 138 13
VCDI 0 0 0 0 153 1484 9555 34077
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 2 0 0 0
VODI 0 0 0 0 13 9 26 0
ODI 0 0 0 0 39 33 14 0
CDI 0 0 0 0 77 179 141 5
VCDI 0 0 0 0 173 1517 9553 34085

Date: 2022-04-23:

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 2 0 0 0
VODI 0 0 0 0 9 4 23 0
ODI 0 0 0 0 43 42 18 7
CDI 0 0 0 0 67 182 76 170
VCDI 0 0 0 0 42 1619 11171 32391
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 2 0 0 0
VODI 0 0 0 0 15 4 23 0
ODI 0 0 0 0 36 47 18 4
CDI 0 0 0 0 47 166 102 167
VCDI 0 0 0 0 63 1630 11145 32397

Date: 2022-04-25:

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 0 0 0 22 1 0 0
ODI 0 0 0 0 71 39 0 0
CDI 0 0 0 0 112 351 68 0
VCDI 0 0 0 0 196 1732 9528 33746
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 1 0 0 0
VODI 0 0 0 0 20 3 0 0
ODI 0 0 0 0 44 37 8 0
CDI 0 0 0 0 75 242 126 0
VCDI 0 0 0 0 261 1841 9462 33746

Date: 2022-04-27:

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 0 0 0 0 0 0 0
VODI 0 0 0 0 15 2 0 0
ODI 0 0 0 11 38 26 0 0
CDI 0 0 0 28 100 272 60 11
VCDI 0 0 0 49 326 2253 12807 29868
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 1 0 0 0
VODI 0 0 0 0 6 5 0 0
ODI 0 0 0 9 42 59 5 0
CDI 0 0 0 17 84 182 91 10
VCDI 0 0 0 62 346 2307 12771 29869

Date: 2022-04-29:

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 0 0 1 2 2 0 0
VODI 0 0 0 6 17 8 0 0
ODI 0 1 1 16 36 48 1 0
CDI 0 8 1 14 108 202 131 34
VCDI 0 4 2 32 463 2478 11964 30286
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 1 0 7 0 0
VODI 0 0 0 7 4 11 15 0
ODI 0 1 1 15 44 52 37 0
CDI 0 9 1 15 115 367 177 28
VCDI 0 3 2 31 463 2301 11867 30292


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