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 |
133439 |
10541 |
117 |
84 |
0 |
0 |
0 |
0 |
| OW |
1037 |
5071 |
695 |
798 |
34 |
2 |
0 |
0 |
| VODI |
1 |
697 |
578 |
4416 |
1304 |
16 |
0 |
0 |
| ODI |
0 |
46 |
32 |
1207 |
11480 |
1641 |
23 |
0 |
| CDI |
0 |
38 |
0 |
25 |
5401 |
10826 |
956 |
0 |
| VCDI |
0 |
1 |
0 |
0 |
42 |
2922 |
1273 |
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 |
134068 |
12466 |
155 |
40 |
0 |
0 |
0 |
0 |
| OW |
352 |
4009 |
1231 |
1316 |
1 |
0 |
0 |
0 |
| VODI |
3 |
128 |
227 |
4896 |
1227 |
4 |
0 |
0 |
| ODI |
0 |
24 |
0 |
450 |
13252 |
1858 |
0 |
0 |
| CDI |
0 |
22 |
0 |
7 |
2308 |
11586 |
727 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
2046 |
2329 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
133399 |
9784 |
114 |
45 |
1 |
0 |
0 |
0 |
| OW |
1022 |
5540 |
683 |
742 |
22 |
0 |
0 |
0 |
| VODI |
2 |
1228 |
760 |
4260 |
1516 |
5 |
0 |
0 |
| ODI |
0 |
57 |
56 |
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 not yet available
|
...observations not yet available
|
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