Validation of sea ice concentration - European sector
Bulletin date: 2025-10-16
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-10-12:
| 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 |
86542 |
3799 |
104 |
63 |
2 |
0 |
0 |
0 |
| OW |
1707 |
173 |
110 |
174 |
55 |
13 |
0 |
0 |
| VODI |
2285 |
17 |
32 |
177 |
107 |
28 |
5 |
0 |
| ODI |
0 |
0 |
3 |
84 |
160 |
54 |
18 |
0 |
| CDI |
0 |
0 |
0 |
24 |
208 |
157 |
181 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
75 |
1415 |
4959 |
131 |
|
...date precedes bulletin
|
Date: 2025-10-14:
| 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 |
86528 |
3805 |
67 |
30 |
4 |
0 |
0 |
0 |
| OW |
1679 |
244 |
141 |
166 |
51 |
3 |
0 |
0 |
| VODI |
2319 |
9 |
53 |
177 |
93 |
19 |
0 |
0 |
| ODI |
0 |
0 |
2 |
109 |
138 |
37 |
0 |
0 |
| CDI |
0 |
0 |
0 |
71 |
234 |
304 |
120 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
98 |
1904 |
4155 |
302 |
|
...date precedes bulletin
|
Date: 2025-10-16:
| 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 |
85864 |
3769 |
151 |
172 |
51 |
0 |
0 |
0 |
| OW |
1717 |
163 |
100 |
166 |
145 |
14 |
0 |
0 |
| VODI |
2227 |
19 |
32 |
155 |
233 |
101 |
0 |
0 |
| ODI |
0 |
1 |
9 |
60 |
188 |
113 |
4 |
0 |
| CDI |
0 |
0 |
0 |
35 |
219 |
478 |
136 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
2934 |
3242 |
325 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
85865 |
3775 |
160 |
198 |
82 |
2 |
0 |
0 |
| OW |
1717 |
160 |
93 |
146 |
127 |
15 |
0 |
0 |
| VODI |
2226 |
17 |
33 |
149 |
224 |
116 |
0 |
0 |
| ODI |
0 |
0 |
6 |
60 |
172 |
94 |
7 |
0 |
| CDI |
0 |
0 |
0 |
35 |
239 |
464 |
152 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
31 |
2949 |
3223 |
325 |
|
Date: 2025-10-18:
| 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 |
85508 |
3576 |
108 |
166 |
53 |
1 |
0 |
0 |
| OW |
1630 |
172 |
69 |
228 |
110 |
4 |
0 |
0 |
| VODI |
2376 |
15 |
40 |
166 |
231 |
108 |
0 |
0 |
| ODI |
0 |
0 |
0 |
44 |
215 |
311 |
9 |
0 |
| CDI |
0 |
0 |
0 |
21 |
153 |
611 |
85 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
71 |
3570 |
3150 |
58 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
85509 |
3550 |
108 |
186 |
59 |
0 |
0 |
0 |
| OW |
1632 |
189 |
68 |
198 |
126 |
7 |
0 |
0 |
| VODI |
2373 |
24 |
41 |
174 |
217 |
108 |
0 |
0 |
| ODI |
0 |
0 |
0 |
44 |
207 |
324 |
8 |
0 |
| CDI |
0 |
0 |
0 |
23 |
149 |
539 |
94 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
75 |
3627 |
3142 |
58 |
|
Date: 2025-10-20:
| 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 |
85089 |
3798 |
104 |
92 |
8 |
2 |
0 |
0 |
| OW |
1591 |
133 |
106 |
174 |
56 |
1 |
0 |
0 |
| VODI |
2425 |
0 |
18 |
290 |
232 |
15 |
0 |
0 |
| ODI |
0 |
0 |
0 |
22 |
462 |
83 |
0 |
0 |
| CDI |
0 |
0 |
0 |
9 |
376 |
1035 |
27 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
61 |
4090 |
2399 |
162 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
85091 |
3612 |
106 |
156 |
52 |
3 |
0 |
0 |
| OW |
1608 |
277 |
59 |
136 |
154 |
7 |
0 |
0 |
| VODI |
2406 |
42 |
63 |
191 |
294 |
53 |
0 |
0 |
| ODI |
0 |
0 |
0 |
63 |
328 |
171 |
0 |
0 |
| CDI |
0 |
0 |
0 |
40 |
238 |
645 |
23 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
129 |
4347 |
2403 |
162 |
|
Date: 2025-10-22:
| 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 |
84673 |
4048 |
127 |
174 |
5 |
0 |
0 |
0 |
| OW |
1557 |
168 |
68 |
148 |
102 |
5 |
0 |
0 |
| VODI |
2466 |
8 |
33 |
138 |
295 |
12 |
0 |
0 |
| ODI |
0 |
0 |
1 |
51 |
267 |
98 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
294 |
872 |
75 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
33 |
3414 |
3723 |
3 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84677 |
3842 |
121 |
201 |
48 |
9 |
0 |
0 |
| OW |
1565 |
313 |
42 |
126 |
153 |
20 |
0 |
0 |
| VODI |
2454 |
69 |
60 |
111 |
251 |
98 |
0 |
0 |
| ODI |
0 |
0 |
6 |
72 |
194 |
190 |
1 |
0 |
| CDI |
0 |
0 |
0 |
5 |
286 |
588 |
50 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
64 |
3496 |
3747 |
3 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84313 |
4071 |
122 |
230 |
55 |
0 |
0 |
0 |
| OW |
1462 |
227 |
40 |
114 |
156 |
26 |
0 |
0 |
| VODI |
2637 |
39 |
41 |
123 |
235 |
73 |
0 |
0 |
| ODI |
0 |
0 |
1 |
29 |
259 |
229 |
1 |
0 |
| CDI |
0 |
0 |
0 |
1 |
114 |
578 |
172 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
47 |
2105 |
5071 |
291 |
|
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