Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-28
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-22:
| 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 |
130106 |
10919 |
71 |
38 |
0 |
0 |
0 |
0 |
| OW |
662 |
5863 |
1016 |
910 |
5 |
0 |
0 |
0 |
| VODI |
8 |
363 |
608 |
4907 |
1539 |
1 |
0 |
0 |
| ODI |
0 |
2 |
0 |
814 |
11827 |
2878 |
1 |
0 |
| CDI |
0 |
0 |
0 |
108 |
3210 |
10734 |
1537 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
75 |
1970 |
4387 |
184 |
|
...date precedes bulletin
|
Date: 2025-08-24:
| 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 |
129279 |
11774 |
55 |
53 |
0 |
0 |
0 |
0 |
| OW |
1013 |
6215 |
701 |
586 |
0 |
0 |
0 |
0 |
| VODI |
7 |
787 |
667 |
4933 |
1320 |
0 |
0 |
0 |
| ODI |
0 |
8 |
2 |
1183 |
12033 |
2832 |
2 |
0 |
| CDI |
0 |
21 |
0 |
101 |
3466 |
10539 |
442 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
64 |
2614 |
4043 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-08-28:
| 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 |
131392 |
12610 |
68 |
94 |
0 |
0 |
0 |
0 |
| OW |
360 |
5467 |
1022 |
1240 |
12 |
0 |
0 |
0 |
| VODI |
5 |
155 |
250 |
4913 |
1382 |
2 |
0 |
0 |
| ODI |
0 |
12 |
1 |
354 |
10399 |
1842 |
2 |
0 |
| CDI |
0 |
6 |
0 |
25 |
2928 |
14126 |
438 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
4482 |
1152 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
131375 |
13078 |
106 |
117 |
0 |
0 |
0 |
0 |
| OW |
377 |
4977 |
965 |
1315 |
12 |
0 |
0 |
0 |
| VODI |
5 |
175 |
268 |
4722 |
1395 |
22 |
0 |
0 |
| ODI |
0 |
14 |
1 |
447 |
10065 |
2150 |
4 |
0 |
| CDI |
0 |
6 |
1 |
25 |
3246 |
13715 |
417 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
4565 |
1171 |
0 |
|
Date: 2025-08-30:
| 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 |
132723 |
10889 |
64 |
53 |
0 |
0 |
0 |
0 |
| OW |
242 |
5928 |
936 |
1113 |
20 |
0 |
0 |
0 |
| VODI |
5 |
335 |
367 |
4621 |
1499 |
1 |
0 |
0 |
| ODI |
0 |
27 |
5 |
528 |
10588 |
1451 |
7 |
0 |
| CDI |
0 |
13 |
3 |
23 |
3745 |
14958 |
765 |
0 |
| VCDI |
0 |
3 |
0 |
0 |
21 |
2895 |
915 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
132699 |
11232 |
93 |
96 |
1 |
0 |
0 |
0 |
| OW |
269 |
5536 |
879 |
1125 |
21 |
0 |
0 |
0 |
| VODI |
2 |
382 |
390 |
4501 |
1499 |
1 |
0 |
0 |
| ODI |
0 |
27 |
10 |
589 |
9943 |
1983 |
11 |
0 |
| CDI |
0 |
15 |
3 |
27 |
4388 |
14021 |
726 |
0 |
| VCDI |
0 |
3 |
0 |
0 |
21 |
3300 |
950 |
0 |
|
Date: 2025-09-01:
| 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 |
134033 |
12470 |
70 |
33 |
0 |
0 |
0 |
0 |
| OW |
442 |
3829 |
1237 |
1584 |
7 |
0 |
0 |
0 |
| VODI |
2 |
68 |
115 |
4670 |
1198 |
8 |
0 |
0 |
| ODI |
0 |
10 |
0 |
242 |
14661 |
502 |
0 |
0 |
| CDI |
0 |
17 |
0 |
1 |
2374 |
12835 |
191 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
21 |
2062 |
2061 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133378 |
9962 |
83 |
64 |
0 |
0 |
0 |
0 |
| OW |
1098 |
5354 |
632 |
708 |
37 |
0 |
0 |
0 |
| VODI |
1 |
1004 |
673 |
4425 |
1377 |
8 |
0 |
0 |
| ODI |
0 |
37 |
34 |
1286 |
10962 |
1668 |
17 |
0 |
| CDI |
0 |
37 |
0 |
47 |
5847 |
10498 |
932 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
38 |
3233 |
1303 |
0 |
|
Date: 2025-09-03:
| 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 |
134060 |
12540 |
61 |
28 |
0 |
0 |
0 |
0 |
| OW |
370 |
4134 |
1152 |
1219 |
1 |
0 |
0 |
0 |
| VODI |
3 |
138 |
219 |
4995 |
1038 |
4 |
0 |
0 |
| ODI |
0 |
20 |
0 |
429 |
13665 |
1529 |
1 |
0 |
| CDI |
0 |
22 |
0 |
4 |
2084 |
11717 |
548 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
2244 |
2507 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133409 |
9798 |
93 |
42 |
1 |
0 |
0 |
0 |
| OW |
1022 |
5633 |
602 |
730 |
22 |
0 |
0 |
0 |
| VODI |
2 |
1323 |
684 |
4241 |
1516 |
5 |
0 |
0 |
| ODI |
0 |
60 |
53 |
1562 |
9833 |
2388 |
23 |
0 |
| CDI |
0 |
37 |
0 |
100 |
5373 |
10291 |
1085 |
0 |
| VCDI |
0 |
3 |
0 |
0 |
54 |
2810 |
1948 |
0 |
|
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 |
134562 |
11989 |
64 |
40 |
0 |
0 |
0 |
0 |
| OW |
401 |
4315 |
1032 |
1020 |
7 |
0 |
0 |
0 |
| VODI |
18 |
288 |
305 |
5234 |
1003 |
43 |
0 |
0 |
| ODI |
0 |
28 |
1 |
364 |
13102 |
1687 |
0 |
0 |
| CDI |
0 |
20 |
0 |
10 |
1821 |
11907 |
415 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
3090 |
1949 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133931 |
9351 |
122 |
68 |
2 |
0 |
0 |
0 |
| OW |
1047 |
5562 |
580 |
892 |
35 |
1 |
0 |
0 |
| VODI |
3 |
1543 |
598 |
4110 |
1734 |
70 |
0 |
0 |
| ODI |
0 |
147 |
98 |
1409 |
8660 |
2360 |
13 |
0 |
| CDI |
0 |
35 |
4 |
189 |
5462 |
9827 |
771 |
0 |
| VCDI |
0 |
2 |
0 |
0 |
68 |
4469 |
1580 |
0 |
|
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