Validation of sea ice concentration - Full domain
Bulletin date: 2025-09-11
Data source: OSI SAF N.H. AMSR sea ice concentration
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 |
115719 |
13635 |
92 |
39 |
7 |
0 |
0 |
0 |
| OW |
2736 |
4936 |
977 |
669 |
39 |
0 |
0 |
0 |
| VODI |
1026 |
471 |
777 |
4242 |
1278 |
41 |
0 |
0 |
| ODI |
0 |
16 |
16 |
1241 |
10652 |
3208 |
2 |
0 |
| CDI |
0 |
7 |
3 |
18 |
1718 |
11436 |
824 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
2519 |
2451 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-07:
| 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 |
116158 |
12952 |
71 |
22 |
4 |
0 |
0 |
0 |
| OW |
2716 |
5084 |
848 |
655 |
35 |
0 |
0 |
0 |
| VODI |
1066 |
671 |
841 |
4138 |
1281 |
69 |
1 |
0 |
| ODI |
0 |
19 |
24 |
1364 |
9321 |
3172 |
5 |
0 |
| CDI |
0 |
7 |
7 |
55 |
2049 |
11783 |
1224 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
34 |
2938 |
2186 |
0 |
|
...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 |
115792 |
14902 |
117 |
41 |
1 |
0 |
0 |
0 |
| OW |
2664 |
3776 |
1296 |
889 |
45 |
0 |
0 |
0 |
| VODI |
1148 |
75 |
341 |
4591 |
1106 |
5 |
0 |
0 |
| ODI |
0 |
6 |
4 |
942 |
6482 |
900 |
4 |
0 |
| CDI |
0 |
0 |
3 |
29 |
3782 |
15853 |
959 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
11 |
1936 |
3109 |
0 |
|
...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 |
115679 |
13780 |
89 |
26 |
0 |
0 |
0 |
0 |
| OW |
2669 |
4553 |
972 |
905 |
121 |
1 |
0 |
0 |
| VODI |
1264 |
312 |
532 |
4119 |
1413 |
90 |
1 |
0 |
| ODI |
0 |
7 |
10 |
998 |
4657 |
1126 |
16 |
0 |
| CDI |
0 |
2 |
4 |
47 |
3018 |
13573 |
1370 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
5117 |
4315 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115684 |
14034 |
123 |
29 |
0 |
0 |
0 |
0 |
| OW |
2669 |
4283 |
968 |
958 |
128 |
0 |
0 |
0 |
| VODI |
1259 |
326 |
497 |
4072 |
1488 |
89 |
1 |
0 |
| ODI |
0 |
10 |
15 |
989 |
4687 |
1184 |
16 |
0 |
| CDI |
0 |
1 |
4 |
46 |
2896 |
13925 |
1529 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
34 |
4709 |
4156 |
0 |
|
Date: 2025-09-13:
| 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 |
115034 |
13836 |
126 |
43 |
0 |
0 |
0 |
0 |
| OW |
2857 |
4628 |
764 |
762 |
137 |
5 |
0 |
0 |
| VODI |
1339 |
489 |
538 |
3815 |
1686 |
129 |
2 |
0 |
| ODI |
0 |
7 |
10 |
871 |
4023 |
1512 |
12 |
0 |
| CDI |
0 |
0 |
0 |
30 |
2419 |
11575 |
1202 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
6032 |
6921 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115011 |
13913 |
135 |
53 |
0 |
0 |
0 |
0 |
| OW |
2889 |
4569 |
776 |
785 |
129 |
3 |
0 |
0 |
| VODI |
1330 |
466 |
506 |
3859 |
1754 |
136 |
0 |
0 |
| ODI |
0 |
12 |
20 |
782 |
4161 |
1609 |
12 |
0 |
| CDI |
0 |
0 |
1 |
42 |
2225 |
11596 |
1390 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
5909 |
6735 |
0 |
|
Date: 2025-09-15:
| 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 |
117607 |
13900 |
91 |
34 |
3 |
0 |
0 |
0 |
| OW |
2394 |
3133 |
1133 |
745 |
32 |
3 |
0 |
0 |
| VODI |
1443 |
28 |
146 |
3478 |
945 |
6 |
0 |
0 |
| ODI |
0 |
1 |
0 |
382 |
3893 |
384 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
1638 |
13805 |
662 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
20 |
4469 |
10428 |
4 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117171 |
12019 |
116 |
79 |
3 |
0 |
0 |
0 |
| OW |
2881 |
4351 |
689 |
912 |
251 |
30 |
0 |
0 |
| VODI |
1392 |
674 |
525 |
2839 |
1791 |
498 |
17 |
0 |
| ODI |
0 |
16 |
40 |
790 |
3032 |
1814 |
68 |
0 |
| CDI |
0 |
2 |
0 |
22 |
1406 |
10524 |
1335 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
48 |
5801 |
9670 |
4 |
|
Date: 2025-09-17:
| 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 |
117623 |
13961 |
211 |
69 |
2 |
0 |
0 |
0 |
| OW |
2374 |
2936 |
855 |
950 |
139 |
30 |
0 |
0 |
| VODI |
1479 |
189 |
318 |
2714 |
1349 |
29 |
0 |
0 |
| ODI |
0 |
14 |
24 |
523 |
3028 |
722 |
7 |
0 |
| CDI |
0 |
0 |
3 |
83 |
1617 |
11353 |
874 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
130 |
4603 |
12299 |
300 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117249 |
12137 |
240 |
122 |
3 |
0 |
0 |
0 |
| OW |
2910 |
4276 |
607 |
1003 |
387 |
21 |
0 |
0 |
| VODI |
1317 |
650 |
525 |
2418 |
1859 |
380 |
3 |
0 |
| ODI |
0 |
37 |
38 |
756 |
2939 |
1857 |
75 |
0 |
| CDI |
0 |
0 |
1 |
42 |
1038 |
8952 |
1443 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
5527 |
11659 |
300 |
|
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 |
117089 |
14337 |
193 |
110 |
2 |
0 |
0 |
0 |
| OW |
2327 |
3115 |
755 |
831 |
99 |
11 |
0 |
0 |
| VODI |
1517 |
348 |
375 |
2052 |
1445 |
220 |
0 |
0 |
| ODI |
0 |
53 |
31 |
328 |
1422 |
2336 |
128 |
0 |
| CDI |
0 |
22 |
30 |
163 |
1069 |
8606 |
3193 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
82 |
6092 |
10608 |
1819 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116546 |
12278 |
231 |
256 |
84 |
2 |
0 |
0 |
| OW |
3023 |
4526 |
566 |
796 |
313 |
78 |
0 |
0 |
| VODI |
1364 |
984 |
504 |
1920 |
1511 |
577 |
19 |
0 |
| ODI |
0 |
62 |
58 |
427 |
1599 |
3172 |
536 |
0 |
| CDI |
0 |
23 |
25 |
85 |
545 |
7034 |
2512 |
0 |
| VCDI |
0 |
2 |
0 |
2 |
67 |
6402 |
10862 |
1819 |
|
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