Validation of sea ice concentration - European sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-31:
| 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 |
83793 |
4710 |
34 |
26 |
0 |
0 |
0 |
0 |
| OW |
1312 |
270 |
70 |
52 |
6 |
0 |
0 |
0 |
| VODI |
2825 |
75 |
67 |
152 |
95 |
12 |
0 |
0 |
| ODI |
0 |
19 |
19 |
66 |
150 |
70 |
5 |
0 |
| CDI |
0 |
5 |
13 |
37 |
154 |
295 |
53 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1318 |
6825 |
295 |
|
...date precedes bulletin
|
Date: 2025-11-02:
| 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 |
83454 |
4751 |
67 |
12 |
0 |
0 |
0 |
0 |
| OW |
1240 |
251 |
130 |
91 |
13 |
0 |
0 |
0 |
| VODI |
2973 |
67 |
60 |
126 |
116 |
33 |
0 |
0 |
| ODI |
0 |
11 |
14 |
74 |
92 |
86 |
2 |
0 |
| CDI |
0 |
1 |
5 |
39 |
139 |
385 |
60 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
1087 |
7062 |
402 |
|
...date precedes bulletin
|
Date: 2025-11-04:
| 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 |
83313 |
4882 |
42 |
23 |
0 |
0 |
0 |
0 |
| OW |
1223 |
243 |
109 |
117 |
44 |
2 |
0 |
0 |
| VODI |
2992 |
35 |
45 |
92 |
97 |
30 |
0 |
0 |
| ODI |
0 |
10 |
12 |
63 |
115 |
63 |
4 |
0 |
| CDI |
0 |
5 |
6 |
34 |
123 |
332 |
89 |
0 |
| VCDI |
0 |
2 |
3 |
9 |
34 |
1469 |
6919 |
281 |
|
...date precedes bulletin
|
Date: 2025-11-06:
| 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 |
82702 |
5378 |
62 |
70 |
9 |
0 |
0 |
0 |
| OW |
1203 |
256 |
48 |
93 |
61 |
1 |
0 |
0 |
| VODI |
3015 |
68 |
56 |
80 |
65 |
37 |
0 |
0 |
| ODI |
0 |
19 |
27 |
61 |
72 |
64 |
6 |
0 |
| CDI |
0 |
1 |
10 |
61 |
139 |
334 |
36 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1848 |
6391 |
571 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82702 |
5402 |
69 |
92 |
11 |
0 |
0 |
0 |
| OW |
1202 |
226 |
48 |
82 |
68 |
2 |
0 |
0 |
| VODI |
3016 |
70 |
44 |
70 |
62 |
31 |
0 |
0 |
| ODI |
0 |
21 |
26 |
52 |
67 |
63 |
3 |
0 |
| CDI |
0 |
3 |
16 |
68 |
135 |
341 |
41 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
21 |
1847 |
6389 |
571 |
|
Date: 2025-11-08:
| 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 |
82531 |
5127 |
239 |
54 |
4 |
0 |
0 |
0 |
| OW |
1185 |
180 |
90 |
120 |
47 |
0 |
0 |
0 |
| VODI |
3039 |
45 |
60 |
132 |
69 |
14 |
0 |
0 |
| ODI |
0 |
9 |
16 |
85 |
114 |
55 |
0 |
0 |
| CDI |
0 |
0 |
6 |
40 |
155 |
396 |
54 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
29 |
1679 |
6603 |
683 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82531 |
5173 |
258 |
70 |
8 |
0 |
0 |
0 |
| OW |
1183 |
130 |
72 |
110 |
48 |
0 |
0 |
0 |
| VODI |
3041 |
47 |
57 |
140 |
61 |
9 |
0 |
0 |
| ODI |
0 |
11 |
17 |
70 |
118 |
46 |
0 |
0 |
| CDI |
0 |
0 |
7 |
39 |
154 |
415 |
53 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
29 |
1674 |
6604 |
683 |
|
Date: 2025-11-10:
| 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 |
82077 |
5679 |
66 |
78 |
25 |
0 |
0 |
0 |
| OW |
1162 |
335 |
96 |
70 |
35 |
0 |
0 |
0 |
| VODI |
3068 |
35 |
52 |
148 |
72 |
2 |
0 |
0 |
| ODI |
0 |
1 |
7 |
82 |
110 |
35 |
0 |
0 |
| CDI |
0 |
0 |
2 |
36 |
197 |
311 |
15 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
1417 |
7401 |
231 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82077 |
5606 |
76 |
80 |
26 |
0 |
0 |
0 |
| OW |
1168 |
238 |
24 |
47 |
38 |
0 |
0 |
0 |
| VODI |
3062 |
150 |
71 |
78 |
38 |
9 |
0 |
0 |
| ODI |
0 |
43 |
35 |
82 |
67 |
22 |
0 |
0 |
| CDI |
0 |
13 |
17 |
124 |
213 |
231 |
15 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
74 |
1503 |
7401 |
231 |
|
Date: 2025-11-12:
| 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 |
79949 |
7279 |
168 |
139 |
44 |
3 |
0 |
0 |
| OW |
1153 |
237 |
87 |
71 |
85 |
13 |
0 |
0 |
| VODI |
3093 |
49 |
51 |
135 |
88 |
34 |
0 |
0 |
| ODI |
0 |
11 |
13 |
63 |
127 |
60 |
3 |
0 |
| CDI |
0 |
0 |
2 |
33 |
144 |
527 |
88 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1051 |
7442 |
620 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79958 |
7093 |
171 |
152 |
59 |
4 |
0 |
0 |
| OW |
1146 |
258 |
34 |
39 |
66 |
17 |
0 |
0 |
| VODI |
3091 |
162 |
60 |
65 |
64 |
18 |
0 |
0 |
| ODI |
0 |
51 |
41 |
109 |
71 |
53 |
2 |
0 |
| CDI |
0 |
12 |
15 |
76 |
213 |
535 |
145 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
1061 |
7386 |
620 |
|
Date: 2025-11-14:
| 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 |
81783 |
5054 |
127 |
102 |
27 |
0 |
0 |
0 |
| OW |
1178 |
319 |
61 |
83 |
117 |
15 |
0 |
0 |
| VODI |
3117 |
73 |
85 |
164 |
115 |
36 |
0 |
0 |
| ODI |
0 |
0 |
9 |
93 |
182 |
72 |
0 |
0 |
| CDI |
0 |
0 |
0 |
12 |
178 |
667 |
93 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1251 |
7669 |
180 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81834 |
5013 |
124 |
120 |
75 |
5 |
0 |
0 |
| OW |
1140 |
283 |
53 |
72 |
61 |
19 |
0 |
0 |
| VODI |
3104 |
134 |
75 |
130 |
111 |
19 |
0 |
0 |
| ODI |
0 |
16 |
28 |
88 |
156 |
51 |
0 |
0 |
| CDI |
0 |
0 |
2 |
44 |
206 |
514 |
38 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1433 |
7724 |
180 |
|
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