Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-07
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-01:
| 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 |
118517 |
13278 |
157 |
118 |
2 |
0 |
0 |
0 |
| OW |
424 |
4083 |
977 |
1775 |
12 |
0 |
0 |
0 |
| VODI |
38 |
435 |
393 |
5988 |
1501 |
6 |
0 |
0 |
| ODI |
0 |
50 |
16 |
808 |
9908 |
6241 |
115 |
0 |
| CDI |
0 |
28 |
13 |
270 |
4937 |
16277 |
3380 |
90 |
| VCDI |
0 |
0 |
0 |
1 |
120 |
2007 |
2126 |
652 |
|
...date precedes bulletin
|
Date: 2025-08-03:
| 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 |
118441 |
13335 |
126 |
98 |
1 |
0 |
0 |
0 |
| OW |
378 |
4733 |
960 |
1608 |
11 |
0 |
0 |
0 |
| VODI |
33 |
803 |
535 |
6674 |
1160 |
1 |
0 |
0 |
| ODI |
0 |
95 |
13 |
1192 |
8651 |
7385 |
220 |
0 |
| CDI |
0 |
67 |
41 |
212 |
4938 |
13922 |
4021 |
724 |
| VCDI |
0 |
8 |
0 |
23 |
248 |
987 |
2212 |
887 |
|
...date precedes bulletin
|
Date: 2025-08-05:
| 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 |
119958 |
14270 |
175 |
91 |
0 |
0 |
0 |
0 |
| OW |
237 |
4599 |
1190 |
2026 |
18 |
0 |
0 |
0 |
| VODI |
0 |
195 |
176 |
5954 |
1703 |
10 |
0 |
0 |
| ODI |
0 |
15 |
2 |
323 |
9748 |
873 |
0 |
0 |
| CDI |
0 |
9 |
1 |
28 |
4160 |
19641 |
1653 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
30 |
1316 |
5019 |
1323 |
|
...date precedes bulletin
|
Date: 2025-08-07:
| 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 |
121318 |
13356 |
137 |
135 |
0 |
0 |
0 |
0 |
| OW |
330 |
4956 |
1016 |
1568 |
26 |
0 |
0 |
0 |
| VODI |
0 |
431 |
266 |
5921 |
1526 |
26 |
0 |
0 |
| ODI |
0 |
22 |
7 |
718 |
8482 |
1841 |
110 |
0 |
| CDI |
0 |
2 |
0 |
52 |
5033 |
17932 |
3526 |
129 |
| VCDI |
0 |
0 |
0 |
9 |
62 |
671 |
3513 |
1622 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
121326 |
13869 |
230 |
175 |
0 |
0 |
0 |
0 |
| OW |
322 |
4441 |
929 |
1742 |
40 |
0 |
0 |
0 |
| VODI |
0 |
430 |
253 |
5623 |
1612 |
44 |
0 |
0 |
| ODI |
0 |
21 |
14 |
786 |
8524 |
1724 |
104 |
0 |
| CDI |
0 |
6 |
0 |
68 |
4887 |
17766 |
3407 |
71 |
| VCDI |
0 |
0 |
0 |
9 |
66 |
936 |
3638 |
1680 |
|
Date: 2025-08-09:
| 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 |
122532 |
12612 |
103 |
66 |
0 |
0 |
0 |
0 |
| OW |
291 |
5319 |
981 |
1181 |
27 |
0 |
0 |
0 |
| VODI |
1 |
657 |
611 |
5869 |
1501 |
3 |
0 |
0 |
| ODI |
0 |
38 |
36 |
1003 |
9097 |
1802 |
23 |
0 |
| CDI |
0 |
0 |
0 |
56 |
5330 |
16887 |
3227 |
3 |
| VCDI |
0 |
0 |
0 |
18 |
84 |
740 |
3453 |
1192 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
122533 |
13124 |
188 |
124 |
0 |
0 |
0 |
0 |
| OW |
291 |
4825 |
912 |
1419 |
43 |
0 |
0 |
0 |
| VODI |
0 |
627 |
593 |
5475 |
1609 |
3 |
0 |
0 |
| ODI |
0 |
47 |
38 |
1091 |
8427 |
1862 |
22 |
0 |
| CDI |
0 |
3 |
0 |
66 |
5873 |
16638 |
2907 |
4 |
| VCDI |
0 |
0 |
0 |
18 |
87 |
929 |
3774 |
1191 |
|
Date: 2025-08-11:
| 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 |
124677 |
12837 |
143 |
61 |
0 |
0 |
0 |
0 |
| OW |
465 |
4363 |
1386 |
1740 |
8 |
0 |
0 |
0 |
| VODI |
0 |
78 |
78 |
6258 |
1019 |
1 |
0 |
0 |
| ODI |
0 |
6 |
1 |
212 |
12955 |
257 |
0 |
0 |
| CDI |
0 |
2 |
1 |
16 |
2683 |
17825 |
126 |
0 |
| VCDI |
0 |
0 |
0 |
21 |
84 |
1455 |
5954 |
31 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
124446 |
11345 |
147 |
84 |
6 |
0 |
0 |
0 |
| OW |
648 |
5023 |
870 |
1222 |
64 |
0 |
0 |
0 |
| VODI |
48 |
844 |
551 |
5818 |
1399 |
20 |
0 |
0 |
| ODI |
0 |
72 |
40 |
1086 |
8269 |
1873 |
13 |
0 |
| CDI |
0 |
2 |
1 |
73 |
6920 |
15697 |
2056 |
0 |
| VCDI |
0 |
0 |
0 |
25 |
91 |
1948 |
4011 |
31 |
|
Date: 2025-08-13:
| 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 |
126015 |
11864 |
119 |
72 |
2 |
0 |
0 |
0 |
| OW |
551 |
4759 |
1148 |
1376 |
28 |
1 |
0 |
0 |
| VODI |
5 |
270 |
200 |
6272 |
907 |
0 |
0 |
0 |
| ODI |
0 |
5 |
0 |
529 |
12285 |
638 |
1 |
0 |
| CDI |
0 |
2 |
1 |
18 |
4199 |
15478 |
1150 |
0 |
| VCDI |
0 |
9 |
0 |
2 |
131 |
1276 |
4658 |
772 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
125681 |
10320 |
128 |
94 |
6 |
0 |
0 |
0 |
| OW |
835 |
5281 |
770 |
1171 |
73 |
1 |
0 |
0 |
| VODI |
55 |
1253 |
532 |
5572 |
1259 |
62 |
1 |
0 |
| ODI |
0 |
43 |
37 |
1292 |
8226 |
1413 |
9 |
0 |
| CDI |
0 |
3 |
1 |
132 |
7870 |
14450 |
2330 |
2 |
| VCDI |
0 |
9 |
0 |
8 |
118 |
1467 |
3469 |
770 |
|
Date: 2025-08-15:
| 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 |
128054 |
9885 |
103 |
61 |
3 |
0 |
0 |
0 |
| OW |
934 |
5186 |
827 |
884 |
33 |
0 |
0 |
0 |
| VODI |
13 |
484 |
599 |
6349 |
714 |
1 |
0 |
0 |
| ODI |
0 |
14 |
2 |
848 |
12170 |
760 |
0 |
0 |
| CDI |
0 |
1 |
0 |
26 |
3627 |
15138 |
1121 |
0 |
| VCDI |
0 |
9 |
1 |
12 |
108 |
1605 |
4514 |
657 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
127573 |
8376 |
102 |
154 |
24 |
0 |
0 |
0 |
| OW |
1306 |
5488 |
577 |
906 |
93 |
0 |
0 |
0 |
| VODI |
122 |
1601 |
797 |
5520 |
1178 |
14 |
0 |
0 |
| ODI |
0 |
104 |
55 |
1436 |
7620 |
1373 |
4 |
0 |
| CDI |
0 |
1 |
0 |
146 |
7608 |
14750 |
1878 |
61 |
| VCDI |
0 |
9 |
1 |
18 |
132 |
1367 |
3753 |
596 |
|
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