Validation of sea ice concentration
Bulletin date: 2025-08-07
Model vs. observations, sea ice class contingency tables
Date: 2025-08-01:
| 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 |
89983 |
25715 |
9575 |
1092 |
116 |
24 |
97 |
0 |
| OW |
0 |
235 |
1708 |
2597 |
566 |
255 |
159 |
0 |
| VODI |
0 |
0 |
146 |
1347 |
1247 |
1099 |
635 |
0 |
| ODI |
0 |
0 |
4 |
186 |
460 |
1496 |
3657 |
1739 |
| CDI |
0 |
0 |
0 |
8 |
57 |
668 |
6758 |
3178 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
8 |
1383 |
2646 |
|
...date precedes bulletin
|
Date: 2025-08-05:
| 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 |
97644 |
20743 |
8185 |
504 |
41 |
21 |
111 |
0 |
| OW |
0 |
514 |
2453 |
2088 |
663 |
98 |
150 |
0 |
| VODI |
0 |
17 |
675 |
1600 |
945 |
546 |
471 |
0 |
| ODI |
0 |
0 |
54 |
202 |
416 |
1114 |
2672 |
2123 |
| CDI |
0 |
0 |
0 |
76 |
75 |
328 |
6603 |
6313 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
5 |
960 |
434 |
|
...date precedes bulletin
|
Date: 2025-08-07:
| 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 |
100629 |
20186 |
7932 |
705 |
96 |
32 |
96 |
0 |
| OW |
0 |
484 |
2184 |
2712 |
777 |
165 |
256 |
0 |
| VODI |
0 |
1 |
268 |
857 |
634 |
516 |
566 |
0 |
| ODI |
0 |
0 |
0 |
133 |
277 |
697 |
4316 |
1440 |
| CDI |
0 |
0 |
0 |
9 |
35 |
131 |
4932 |
6250 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
749 |
779 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
100629 |
20186 |
7932 |
705 |
96 |
32 |
96 |
0 |
| OW |
0 |
484 |
2184 |
2712 |
777 |
165 |
256 |
0 |
| VODI |
0 |
1 |
268 |
857 |
634 |
516 |
566 |
0 |
| ODI |
0 |
0 |
0 |
133 |
277 |
697 |
4316 |
1440 |
| CDI |
0 |
0 |
0 |
9 |
35 |
131 |
4932 |
6250 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
749 |
779 |
|
Date: 2025-08-11:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-08-13:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-08-15:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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