Validation of sea ice concentration - European sector
Bulletin date: 2025-10-30
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-24:
| 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 |
84311 |
4172 |
108 |
206 |
24 |
0 |
0 |
0 |
| OW |
1445 |
151 |
73 |
142 |
130 |
1 |
0 |
0 |
| VODI |
2656 |
13 |
21 |
104 |
233 |
59 |
0 |
0 |
| ODI |
0 |
1 |
2 |
35 |
193 |
138 |
0 |
0 |
| CDI |
0 |
0 |
0 |
10 |
228 |
577 |
110 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
58 |
2236 |
5134 |
291 |
|
...date precedes bulletin
|
Date: 2025-10-26:
| 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 |
84056 |
4219 |
105 |
183 |
54 |
0 |
0 |
0 |
| OW |
1407 |
109 |
75 |
147 |
148 |
14 |
0 |
0 |
| VODI |
2705 |
20 |
19 |
90 |
176 |
98 |
1 |
0 |
| ODI |
0 |
0 |
3 |
32 |
145 |
139 |
15 |
0 |
| CDI |
0 |
0 |
0 |
9 |
95 |
507 |
200 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
1273 |
6568 |
231 |
|
...date precedes bulletin
|
Date: 2025-10-28:
| 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 |
83944 |
4268 |
157 |
94 |
4 |
0 |
0 |
0 |
| OW |
1368 |
80 |
90 |
176 |
62 |
1 |
0 |
0 |
| VODI |
2754 |
19 |
28 |
145 |
167 |
43 |
0 |
0 |
| ODI |
0 |
1 |
4 |
41 |
268 |
208 |
30 |
0 |
| CDI |
0 |
0 |
0 |
13 |
82 |
299 |
108 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
1624 |
6513 |
260 |
|
...date precedes bulletin
|
Date: 2025-10-30:
| 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 |
83899 |
4575 |
63 |
30 |
0 |
0 |
0 |
0 |
| OW |
1329 |
182 |
45 |
72 |
26 |
3 |
0 |
0 |
| VODI |
2805 |
67 |
75 |
156 |
105 |
26 |
1 |
0 |
| ODI |
0 |
13 |
16 |
66 |
160 |
97 |
7 |
0 |
| CDI |
0 |
2 |
4 |
36 |
175 |
266 |
54 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
56 |
1304 |
6466 |
681 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83899 |
4565 |
56 |
27 |
0 |
0 |
0 |
0 |
| OW |
1322 |
189 |
48 |
63 |
19 |
1 |
0 |
0 |
| VODI |
2812 |
70 |
76 |
146 |
87 |
23 |
0 |
0 |
| ODI |
0 |
12 |
19 |
83 |
151 |
81 |
4 |
0 |
| CDI |
0 |
3 |
4 |
41 |
198 |
274 |
45 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1317 |
6479 |
681 |
|
Date: 2025-11-01:
| 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 |
83267 |
4981 |
209 |
18 |
0 |
0 |
0 |
0 |
| OW |
1304 |
261 |
118 |
58 |
3 |
0 |
0 |
0 |
| VODI |
2838 |
85 |
61 |
152 |
92 |
18 |
0 |
0 |
| ODI |
0 |
28 |
20 |
66 |
121 |
64 |
4 |
0 |
| CDI |
0 |
7 |
11 |
49 |
155 |
353 |
46 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
26 |
1348 |
6352 |
747 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83267 |
4979 |
209 |
22 |
0 |
0 |
0 |
0 |
| OW |
1304 |
260 |
119 |
56 |
6 |
0 |
0 |
0 |
| VODI |
2838 |
81 |
50 |
133 |
75 |
13 |
0 |
0 |
| ODI |
0 |
35 |
27 |
67 |
108 |
64 |
2 |
0 |
| CDI |
0 |
7 |
14 |
65 |
167 |
326 |
48 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
41 |
1380 |
6352 |
747 |
|
Date: 2025-11-03:
| 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 |
83489 |
4715 |
39 |
12 |
0 |
0 |
0 |
0 |
| OW |
1233 |
265 |
132 |
113 |
39 |
1 |
0 |
0 |
| VODI |
2981 |
16 |
35 |
138 |
109 |
34 |
0 |
0 |
| ODI |
0 |
1 |
4 |
54 |
129 |
92 |
6 |
0 |
| CDI |
0 |
0 |
2 |
15 |
134 |
384 |
60 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1169 |
6789 |
662 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83481 |
4637 |
47 |
27 |
0 |
0 |
0 |
0 |
| OW |
1238 |
293 |
77 |
65 |
35 |
2 |
0 |
0 |
| VODI |
2984 |
58 |
63 |
111 |
97 |
29 |
0 |
0 |
| ODI |
0 |
8 |
18 |
82 |
105 |
80 |
0 |
0 |
| CDI |
0 |
1 |
6 |
46 |
156 |
398 |
179 |
0 |
| VCDI |
0 |
0 |
1 |
1 |
28 |
1171 |
6676 |
662 |
|
Date: 2025-11-05:
| 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 |
83402 |
4808 |
42 |
21 |
2 |
0 |
0 |
0 |
| OW |
1210 |
263 |
98 |
92 |
25 |
0 |
0 |
0 |
| VODI |
3006 |
36 |
48 |
113 |
79 |
27 |
0 |
0 |
| ODI |
0 |
11 |
12 |
60 |
107 |
62 |
0 |
0 |
| CDI |
0 |
13 |
12 |
37 |
112 |
361 |
20 |
0 |
| VCDI |
0 |
1 |
3 |
13 |
45 |
1911 |
6179 |
631 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83389 |
4732 |
57 |
36 |
4 |
0 |
0 |
0 |
| OW |
1228 |
268 |
67 |
60 |
27 |
1 |
0 |
0 |
| VODI |
3001 |
82 |
54 |
117 |
85 |
25 |
0 |
0 |
| ODI |
0 |
20 |
15 |
61 |
99 |
74 |
0 |
0 |
| CDI |
0 |
28 |
18 |
50 |
111 |
374 |
70 |
0 |
| VCDI |
0 |
2 |
4 |
12 |
44 |
1887 |
6129 |
631 |
|
Date: 2025-11-07:
| 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 |
82174 |
5703 |
90 |
77 |
10 |
0 |
0 |
0 |
| OW |
1195 |
186 |
63 |
114 |
82 |
4 |
0 |
0 |
| VODI |
3026 |
41 |
58 |
96 |
108 |
29 |
0 |
0 |
| ODI |
0 |
10 |
17 |
77 |
76 |
89 |
1 |
0 |
| CDI |
0 |
1 |
7 |
49 |
142 |
404 |
76 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
27 |
1421 |
6781 |
627 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82174 |
5732 |
117 |
121 |
32 |
5 |
0 |
0 |
| OW |
1196 |
182 |
65 |
110 |
55 |
29 |
2 |
0 |
| VODI |
3025 |
26 |
43 |
107 |
143 |
42 |
19 |
0 |
| ODI |
0 |
1 |
10 |
53 |
100 |
74 |
30 |
0 |
| CDI |
0 |
0 |
0 |
23 |
101 |
403 |
144 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
1394 |
6663 |
627 |
|
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