Validation of sea ice concentration - American sector
Bulletin date: 2025-09-25
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-19:
| 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 |
32535 |
6143 |
86 |
66 |
0 |
0 |
0 |
0 |
| OW |
37 |
1639 |
393 |
728 |
48 |
0 |
0 |
0 |
| VODI |
0 |
104 |
103 |
1083 |
969 |
43 |
0 |
0 |
| ODI |
0 |
0 |
3 |
142 |
990 |
1619 |
11 |
0 |
| CDI |
0 |
0 |
0 |
47 |
785 |
3616 |
197 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
91 |
4661 |
4986 |
106 |
|
...date precedes bulletin
|
Date: 2025-09-21:
| 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 |
33442 |
4949 |
46 |
46 |
0 |
0 |
0 |
0 |
| OW |
178 |
1769 |
264 |
569 |
68 |
0 |
0 |
0 |
| VODI |
0 |
175 |
72 |
797 |
1073 |
33 |
0 |
0 |
| ODI |
0 |
11 |
4 |
233 |
1083 |
1350 |
0 |
0 |
| CDI |
0 |
6 |
0 |
115 |
790 |
3334 |
131 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
47 |
5297 |
5270 |
78 |
|
...date precedes bulletin
|
Date: 2025-09-23:
| 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 |
34237 |
4450 |
103 |
53 |
0 |
0 |
0 |
0 |
| OW |
291 |
1159 |
163 |
556 |
126 |
0 |
0 |
0 |
| VODI |
52 |
226 |
77 |
607 |
1004 |
95 |
0 |
0 |
| ODI |
0 |
30 |
20 |
207 |
744 |
1369 |
18 |
0 |
| CDI |
0 |
8 |
4 |
118 |
731 |
3245 |
857 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
38 |
3606 |
5905 |
1128 |
|
...date precedes bulletin
|
Date: 2025-09-25:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-09-27:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-09-29:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-10-01:
| 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 |
31076 |
4728 |
352 |
83 |
1 |
0 |
0 |
0 |
| OW |
303 |
1302 |
294 |
490 |
17 |
0 |
0 |
0 |
| VODI |
0 |
117 |
82 |
950 |
241 |
2 |
0 |
0 |
| ODI |
0 |
21 |
8 |
311 |
814 |
16 |
0 |
0 |
| CDI |
0 |
13 |
1 |
10 |
987 |
876 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
198 |
3573 |
8419 |
5946 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
30910 |
4569 |
422 |
228 |
42 |
1 |
0 |
0 |
| OW |
469 |
1118 |
157 |
533 |
351 |
48 |
0 |
0 |
| VODI |
0 |
479 |
137 |
717 |
686 |
325 |
6 |
0 |
| ODI |
0 |
15 |
21 |
254 |
476 |
714 |
91 |
0 |
| CDI |
0 |
0 |
0 |
111 |
486 |
900 |
838 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
217 |
2479 |
7484 |
5946 |
|
Date: 2025-10-03:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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