Validation of sea ice concentration
Bulletin date: 2025-12-04
Model vs. observations, sea ice class contingency tables
Date: 2025-11-28:
| 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 |
74763 |
28146 |
2998 |
242 |
47 |
10 |
0 |
0 |
| OW |
0 |
1135 |
2046 |
1050 |
208 |
168 |
1 |
0 |
| VODI |
0 |
72 |
1693 |
1752 |
830 |
675 |
210 |
0 |
| ODI |
0 |
0 |
301 |
1053 |
872 |
768 |
538 |
1 |
| CDI |
0 |
0 |
187 |
578 |
552 |
1021 |
2157 |
10 |
| VCDI |
0 |
0 |
174 |
444 |
257 |
1114 |
18723 |
14048 |
|
...date precedes bulletin
|
Date: 2025-12-02:
| 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 |
74672 |
28170 |
3498 |
202 |
25 |
7 |
0 |
0 |
| OW |
0 |
1022 |
1909 |
575 |
198 |
165 |
3 |
0 |
| VODI |
0 |
179 |
1336 |
1041 |
640 |
712 |
30 |
0 |
| ODI |
0 |
115 |
764 |
906 |
678 |
782 |
274 |
0 |
| CDI |
0 |
178 |
493 |
511 |
709 |
1556 |
2407 |
108 |
| VCDI |
0 |
12 |
479 |
1219 |
540 |
1367 |
16795 |
14567 |
|
...date precedes bulletin
|
Date: 2025-12-04:
| 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 |
73399 |
29411 |
2547 |
401 |
48 |
35 |
0 |
0 |
| OW |
0 |
897 |
1432 |
1191 |
376 |
188 |
49 |
0 |
| VODI |
0 |
75 |
531 |
1085 |
841 |
885 |
351 |
0 |
| ODI |
0 |
12 |
154 |
600 |
758 |
864 |
496 |
0 |
| CDI |
0 |
1 |
86 |
601 |
758 |
1887 |
2825 |
8 |
| VCDI |
0 |
0 |
17 |
797 |
727 |
3159 |
19032 |
12320 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
73399 |
29411 |
2547 |
401 |
48 |
35 |
0 |
0 |
| OW |
0 |
897 |
1432 |
1191 |
376 |
188 |
49 |
0 |
| VODI |
0 |
75 |
531 |
1085 |
841 |
885 |
351 |
0 |
| ODI |
0 |
12 |
154 |
600 |
758 |
864 |
496 |
0 |
| CDI |
0 |
1 |
86 |
601 |
758 |
1887 |
2825 |
8 |
| VCDI |
0 |
0 |
17 |
797 |
727 |
3159 |
19032 |
12320 |
|
Date: 2025-12-08:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-12-10:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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