Validation of sea ice concentration - European sector
Bulletin date: 2025-10-02
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-26:
| 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 |
88038 |
2965 |
30 |
22 |
0 |
0 |
0 |
0 |
| OW |
2030 |
303 |
79 |
88 |
33 |
0 |
0 |
0 |
| VODI |
1886 |
38 |
56 |
145 |
122 |
20 |
0 |
0 |
| ODI |
0 |
1 |
9 |
91 |
150 |
98 |
0 |
0 |
| CDI |
0 |
0 |
0 |
19 |
271 |
506 |
83 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1091 |
4406 |
264 |
|
...date precedes bulletin
|
Date: 2025-09-28:
| 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 |
88140 |
2788 |
21 |
16 |
1 |
0 |
0 |
0 |
| OW |
2037 |
337 |
72 |
83 |
47 |
0 |
0 |
0 |
| VODI |
1834 |
84 |
59 |
148 |
110 |
22 |
10 |
0 |
| ODI |
0 |
10 |
17 |
80 |
134 |
97 |
13 |
0 |
| CDI |
0 |
0 |
0 |
33 |
264 |
519 |
74 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
1155 |
4422 |
221 |
|
...date precedes bulletin
|
Date: 2025-09-30:
| 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 |
86525 |
4197 |
59 |
22 |
1 |
0 |
0 |
0 |
| OW |
1951 |
169 |
88 |
142 |
30 |
0 |
0 |
0 |
| VODI |
1935 |
15 |
22 |
138 |
186 |
0 |
0 |
0 |
| ODI |
0 |
0 |
4 |
16 |
155 |
96 |
0 |
0 |
| CDI |
0 |
0 |
0 |
10 |
110 |
659 |
124 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
709 |
5011 |
485 |
|
...date precedes bulletin
|
Date: 2025-10-02:
| 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 |
87812 |
2991 |
30 |
24 |
0 |
0 |
0 |
0 |
| OW |
1921 |
201 |
52 |
105 |
30 |
0 |
0 |
0 |
| VODI |
1970 |
43 |
34 |
92 |
132 |
36 |
0 |
0 |
| ODI |
0 |
5 |
15 |
38 |
71 |
60 |
14 |
0 |
| CDI |
0 |
2 |
8 |
40 |
94 |
316 |
49 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
78 |
997 |
5260 |
340 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87811 |
2991 |
26 |
30 |
0 |
0 |
0 |
0 |
| OW |
1927 |
191 |
59 |
108 |
36 |
0 |
0 |
0 |
| VODI |
1965 |
53 |
34 |
83 |
134 |
38 |
0 |
0 |
| ODI |
0 |
6 |
13 |
37 |
62 |
71 |
15 |
0 |
| CDI |
0 |
1 |
7 |
43 |
107 |
305 |
49 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
66 |
995 |
5259 |
340 |
|
Date: 2025-10-04:
| 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 |
87873 |
2886 |
14 |
1 |
0 |
0 |
0 |
0 |
| OW |
1881 |
320 |
48 |
67 |
15 |
0 |
0 |
0 |
| VODI |
2023 |
102 |
39 |
100 |
108 |
1 |
0 |
0 |
| ODI |
0 |
33 |
16 |
44 |
77 |
57 |
18 |
0 |
| CDI |
0 |
18 |
15 |
57 |
107 |
363 |
195 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
31 |
2578 |
3286 |
488 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87876 |
2894 |
17 |
1 |
0 |
0 |
0 |
0 |
| OW |
1893 |
302 |
42 |
71 |
23 |
0 |
0 |
0 |
| VODI |
2008 |
111 |
43 |
100 |
102 |
4 |
0 |
0 |
| ODI |
0 |
33 |
12 |
41 |
80 |
59 |
17 |
0 |
| CDI |
0 |
19 |
18 |
57 |
106 |
383 |
179 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
27 |
2553 |
3303 |
488 |
|
Date: 2025-10-06:
| 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 |
87774 |
2969 |
19 |
9 |
3 |
0 |
0 |
0 |
| OW |
1769 |
437 |
80 |
63 |
8 |
0 |
0 |
0 |
| VODI |
2208 |
22 |
41 |
118 |
94 |
1 |
0 |
0 |
| ODI |
0 |
3 |
7 |
49 |
124 |
34 |
0 |
0 |
| CDI |
0 |
0 |
0 |
18 |
148 |
628 |
96 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
2146 |
3800 |
184 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87776 |
2862 |
15 |
2 |
0 |
0 |
0 |
0 |
| OW |
1790 |
350 |
34 |
53 |
18 |
0 |
0 |
0 |
| VODI |
2185 |
162 |
47 |
65 |
96 |
0 |
0 |
0 |
| ODI |
0 |
40 |
28 |
55 |
75 |
31 |
2 |
0 |
| CDI |
0 |
17 |
23 |
82 |
189 |
428 |
95 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
2350 |
3799 |
184 |
|
Date: 2025-10-08:
| 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 |
87883 |
3109 |
17 |
11 |
0 |
0 |
0 |
0 |
| OW |
1809 |
460 |
43 |
36 |
8 |
0 |
0 |
0 |
| VODI |
2111 |
108 |
30 |
60 |
42 |
2 |
0 |
0 |
| ODI |
0 |
33 |
46 |
63 |
52 |
12 |
0 |
0 |
| CDI |
0 |
8 |
17 |
117 |
323 |
441 |
19 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
165 |
2961 |
2836 |
38 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87889 |
2898 |
14 |
6 |
0 |
0 |
0 |
0 |
| OW |
1825 |
399 |
21 |
25 |
13 |
0 |
0 |
0 |
| VODI |
2089 |
235 |
35 |
59 |
35 |
5 |
0 |
0 |
| ODI |
0 |
108 |
23 |
46 |
34 |
16 |
0 |
0 |
| CDI |
0 |
78 |
59 |
148 |
279 |
218 |
56 |
0 |
| VCDI |
0 |
0 |
1 |
5 |
229 |
3177 |
2799 |
38 |
|
Date: 2025-10-10:
| 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 |
87592 |
3241 |
22 |
24 |
4 |
0 |
0 |
0 |
| OW |
1729 |
385 |
53 |
52 |
17 |
2 |
0 |
0 |
| VODI |
2256 |
136 |
31 |
85 |
47 |
17 |
0 |
0 |
| ODI |
0 |
80 |
18 |
57 |
69 |
41 |
5 |
0 |
| CDI |
0 |
47 |
53 |
132 |
246 |
403 |
295 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
29 |
2117 |
3576 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87658 |
3073 |
27 |
13 |
1 |
0 |
0 |
0 |
| OW |
1814 |
408 |
23 |
56 |
20 |
3 |
0 |
0 |
| VODI |
2105 |
248 |
49 |
52 |
34 |
17 |
1 |
0 |
| ODI |
0 |
85 |
25 |
59 |
42 |
32 |
2 |
0 |
| CDI |
0 |
75 |
53 |
171 |
241 |
257 |
161 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
74 |
2271 |
3712 |
0 |
|
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