Validation of sea ice concentration
Bulletin date: 2025-10-02
Model vs. observations, sea ice class contingency tables
Date: 2025-09-26:
| 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 |
108371 |
21058 |
4753 |
756 |
57 |
16 |
0 |
0 |
| OW |
0 |
83 |
821 |
439 |
238 |
157 |
7 |
0 |
| VODI |
0 |
0 |
139 |
370 |
314 |
393 |
92 |
0 |
| ODI |
0 |
0 |
7 |
114 |
330 |
522 |
512 |
2 |
| CDI |
0 |
0 |
0 |
34 |
166 |
1079 |
2344 |
9 |
| VCDI |
0 |
0 |
0 |
6 |
26 |
186 |
9795 |
5648 |
|
...date precedes bulletin
|
Date: 2025-09-30:
| 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 |
109315 |
19228 |
4581 |
834 |
175 |
9 |
0 |
0 |
| OW |
0 |
120 |
373 |
627 |
484 |
108 |
2 |
0 |
| VODI |
0 |
0 |
19 |
333 |
630 |
336 |
66 |
0 |
| ODI |
0 |
0 |
0 |
115 |
253 |
475 |
255 |
0 |
| CDI |
0 |
0 |
0 |
64 |
282 |
1445 |
1534 |
7 |
| VCDI |
0 |
0 |
0 |
20 |
106 |
579 |
10633 |
5836 |
|
...date precedes bulletin
|
Date: 2025-10-02:
| 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 |
109664 |
19225 |
4649 |
656 |
64 |
9 |
0 |
0 |
| OW |
0 |
28 |
519 |
442 |
322 |
102 |
1 |
0 |
| VODI |
0 |
0 |
146 |
242 |
334 |
365 |
91 |
0 |
| ODI |
0 |
0 |
36 |
103 |
127 |
224 |
296 |
0 |
| CDI |
0 |
0 |
10 |
113 |
252 |
377 |
1391 |
0 |
| VCDI |
0 |
0 |
0 |
50 |
134 |
539 |
10260 |
8073 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
109664 |
19225 |
4649 |
656 |
64 |
9 |
0 |
0 |
| OW |
0 |
28 |
519 |
442 |
322 |
102 |
1 |
0 |
| VODI |
0 |
0 |
146 |
242 |
334 |
365 |
91 |
0 |
| ODI |
0 |
0 |
36 |
103 |
127 |
224 |
296 |
0 |
| CDI |
0 |
0 |
10 |
113 |
252 |
377 |
1391 |
0 |
| VCDI |
0 |
0 |
0 |
50 |
134 |
539 |
10260 |
8073 |
|
Date: 2025-10-06:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-10-08:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-10-10:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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