Validation of sea ice concentration
Bulletin date: 2025-09-11
Model vs. observations, sea ice class contingency tables
Date: 2025-09-05:
| 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 |
106072 |
23326 |
5137 |
1187 |
120 |
20 |
36 |
0 |
| OW |
0 |
21 |
502 |
1866 |
619 |
206 |
82 |
0 |
| VODI |
0 |
0 |
2 |
548 |
1007 |
928 |
480 |
0 |
| ODI |
0 |
0 |
0 |
107 |
313 |
1654 |
5393 |
511 |
| CDI |
0 |
0 |
0 |
32 |
35 |
179 |
2401 |
1146 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
25 |
2673 |
2197 |
|
...date precedes bulletin
|
Date: 2025-09-09:
| 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 |
110440 |
19132 |
5571 |
633 |
103 |
71 |
18 |
0 |
| OW |
0 |
335 |
1165 |
972 |
422 |
263 |
34 |
0 |
| VODI |
0 |
0 |
214 |
464 |
1044 |
968 |
178 |
0 |
| ODI |
0 |
0 |
1 |
39 |
348 |
1425 |
4581 |
102 |
| CDI |
0 |
0 |
0 |
2 |
38 |
218 |
2592 |
2249 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
30 |
2329 |
2863 |
|
...date precedes bulletin
|
Date: 2025-09-11:
| 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 |
109667 |
19633 |
5542 |
976 |
117 |
23 |
16 |
0 |
| OW |
0 |
340 |
582 |
985 |
566 |
178 |
10 |
0 |
| VODI |
0 |
0 |
33 |
592 |
1484 |
716 |
150 |
0 |
| ODI |
0 |
0 |
2 |
69 |
490 |
1518 |
1805 |
0 |
| CDI |
0 |
0 |
0 |
5 |
57 |
388 |
5196 |
1260 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
110 |
3016 |
3313 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109667 |
19633 |
5542 |
976 |
117 |
23 |
16 |
0 |
| OW |
0 |
340 |
582 |
985 |
566 |
178 |
10 |
0 |
| VODI |
0 |
0 |
33 |
592 |
1484 |
716 |
150 |
0 |
| ODI |
0 |
0 |
2 |
69 |
490 |
1518 |
1805 |
0 |
| CDI |
0 |
0 |
0 |
5 |
57 |
388 |
5196 |
1260 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
110 |
3016 |
3313 |
|
Date: 2025-09-15:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-09-17:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-09-19:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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