Validation of sea ice concentration - Full domain
Bulletin date: 2025-09-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-29:
| 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 |
115122 |
11580 |
102 |
38 |
0 |
0 |
0 |
0 |
| OW |
2712 |
5998 |
969 |
738 |
35 |
0 |
0 |
0 |
| VODI |
1325 |
526 |
771 |
3775 |
1648 |
22 |
0 |
0 |
| ODI |
0 |
13 |
15 |
902 |
9242 |
1905 |
7 |
0 |
| CDI |
0 |
11 |
1 |
50 |
3951 |
14422 |
720 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
22 |
3103 |
1085 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-31:
| 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 |
114675 |
11182 |
83 |
46 |
0 |
0 |
0 |
0 |
| OW |
2705 |
6890 |
660 |
544 |
48 |
1 |
0 |
0 |
| VODI |
1184 |
906 |
947 |
3855 |
1286 |
53 |
0 |
0 |
| ODI |
0 |
20 |
39 |
1612 |
10148 |
1981 |
22 |
0 |
| CDI |
0 |
14 |
2 |
55 |
4663 |
12472 |
920 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
2317 |
1463 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-02:
| 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 |
115537 |
13838 |
59 |
9 |
0 |
0 |
0 |
0 |
| OW |
2701 |
4811 |
1221 |
727 |
25 |
0 |
0 |
0 |
| VODI |
1163 |
92 |
463 |
4258 |
1320 |
4 |
0 |
0 |
| ODI |
0 |
8 |
3 |
1040 |
12346 |
2270 |
2 |
0 |
| CDI |
0 |
8 |
1 |
31 |
1966 |
11747 |
694 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
2370 |
2092 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-04:
| 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 |
116072 |
13379 |
61 |
15 |
3 |
0 |
0 |
0 |
| OW |
2739 |
4835 |
1032 |
705 |
35 |
0 |
0 |
0 |
| VODI |
1026 |
280 |
640 |
4402 |
1234 |
22 |
0 |
0 |
| ODI |
0 |
13 |
9 |
1289 |
11350 |
2692 |
7 |
0 |
| CDI |
0 |
10 |
2 |
13 |
1764 |
11259 |
1217 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
16 |
1924 |
2765 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116060 |
13416 |
70 |
13 |
1 |
0 |
0 |
0 |
| OW |
2776 |
4754 |
1043 |
830 |
35 |
0 |
0 |
0 |
| VODI |
1001 |
325 |
619 |
4332 |
1362 |
20 |
0 |
0 |
| ODI |
0 |
12 |
10 |
1229 |
11051 |
2922 |
8 |
0 |
| CDI |
0 |
10 |
2 |
20 |
1945 |
11189 |
1364 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
8 |
1766 |
2617 |
0 |
|
Date: 2025-09-06:
| 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 |
115957 |
13231 |
74 |
40 |
4 |
0 |
0 |
0 |
| OW |
2732 |
4995 |
864 |
718 |
58 |
0 |
0 |
0 |
| VODI |
1040 |
496 |
830 |
4240 |
1403 |
72 |
0 |
0 |
| ODI |
0 |
22 |
12 |
1382 |
9945 |
3207 |
1 |
0 |
| CDI |
0 |
8 |
0 |
29 |
1714 |
11891 |
841 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
2938 |
2042 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115953 |
13376 |
90 |
51 |
2 |
0 |
0 |
0 |
| OW |
2766 |
4799 |
884 |
905 |
73 |
0 |
0 |
0 |
| VODI |
1010 |
550 |
792 |
4061 |
1537 |
79 |
0 |
0 |
| ODI |
0 |
20 |
13 |
1356 |
9672 |
3549 |
20 |
0 |
| CDI |
0 |
7 |
1 |
36 |
1846 |
11652 |
866 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
2828 |
1998 |
0 |
|
Date: 2025-09-08:
| 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 |
116199 |
13075 |
106 |
52 |
8 |
0 |
0 |
0 |
| OW |
2756 |
4727 |
880 |
832 |
105 |
1 |
0 |
0 |
| VODI |
1078 |
766 |
741 |
3943 |
1493 |
97 |
3 |
0 |
| ODI |
0 |
21 |
31 |
1340 |
7930 |
3741 |
11 |
0 |
| CDI |
0 |
11 |
4 |
73 |
2184 |
12319 |
711 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
28 |
3512 |
2026 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
116191 |
12838 |
95 |
42 |
0 |
0 |
0 |
0 |
| OW |
2779 |
4922 |
869 |
871 |
99 |
0 |
0 |
0 |
| VODI |
1063 |
805 |
758 |
3851 |
1604 |
119 |
2 |
0 |
| ODI |
0 |
25 |
37 |
1408 |
7937 |
3954 |
10 |
0 |
| CDI |
0 |
10 |
3 |
70 |
2081 |
12222 |
691 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
27 |
3375 |
2048 |
0 |
|
Date: 2025-09-10:
| 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 |
115553 |
14781 |
166 |
84 |
1 |
0 |
0 |
0 |
| OW |
2644 |
3809 |
1091 |
1009 |
58 |
0 |
0 |
0 |
| VODI |
1199 |
204 |
500 |
4297 |
1255 |
43 |
0 |
0 |
| ODI |
0 |
5 |
7 |
1034 |
5345 |
1323 |
2 |
0 |
| CDI |
0 |
2 |
3 |
43 |
3687 |
14639 |
1050 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
35 |
3707 |
3233 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
115517 |
12061 |
114 |
97 |
0 |
0 |
0 |
0 |
| OW |
2729 |
5721 |
825 |
945 |
105 |
3 |
0 |
0 |
| VODI |
1150 |
970 |
765 |
3740 |
1493 |
225 |
2 |
0 |
| ODI |
0 |
36 |
51 |
1629 |
6132 |
3714 |
11 |
0 |
| CDI |
0 |
13 |
12 |
55 |
2616 |
11689 |
782 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
35 |
4081 |
3490 |
0 |
|
Date: 2025-09-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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