Validation of sea ice concentration - European sector
Bulletin date: 2025-11-27
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-21:
| 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 |
82267 |
5763 |
89 |
53 |
9 |
0 |
0 |
0 |
| OW |
65 |
323 |
151 |
167 |
29 |
0 |
0 |
0 |
| VODI |
3 |
85 |
62 |
307 |
69 |
9 |
0 |
0 |
| ODI |
0 |
3 |
20 |
205 |
201 |
26 |
0 |
0 |
| CDI |
0 |
0 |
0 |
92 |
564 |
268 |
8 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
74 |
1669 |
6232 |
1603 |
|
...date precedes bulletin
|
Date: 2025-11-23:
| 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 |
81747 |
6190 |
74 |
70 |
8 |
1 |
0 |
0 |
| OW |
74 |
351 |
109 |
173 |
46 |
6 |
0 |
0 |
| VODI |
3 |
108 |
92 |
239 |
103 |
11 |
0 |
0 |
| ODI |
0 |
7 |
18 |
175 |
172 |
64 |
0 |
0 |
| CDI |
0 |
0 |
1 |
84 |
424 |
367 |
8 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1437 |
6669 |
1518 |
|
...date precedes bulletin
|
Date: 2025-11-25:
| 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 |
81150 |
6702 |
108 |
79 |
0 |
0 |
0 |
0 |
| OW |
42 |
348 |
173 |
274 |
43 |
1 |
0 |
0 |
| VODI |
0 |
66 |
54 |
282 |
89 |
6 |
0 |
0 |
| ODI |
0 |
0 |
18 |
155 |
141 |
8 |
0 |
0 |
| CDI |
0 |
0 |
1 |
109 |
423 |
331 |
1 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
131 |
1951 |
6144 |
1580 |
|
...date precedes bulletin
|
Date: 2025-11-27:
| 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 |
80523 |
7124 |
120 |
92 |
1 |
0 |
0 |
0 |
| OW |
15 |
428 |
148 |
237 |
48 |
25 |
0 |
0 |
| VODI |
0 |
103 |
114 |
235 |
155 |
22 |
0 |
0 |
| ODI |
0 |
11 |
27 |
177 |
132 |
10 |
0 |
0 |
| CDI |
0 |
1 |
6 |
145 |
402 |
330 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
39 |
169 |
2010 |
5672 |
1895 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80525 |
7068 |
113 |
78 |
1 |
0 |
0 |
0 |
| OW |
13 |
481 |
154 |
226 |
41 |
23 |
0 |
0 |
| VODI |
0 |
104 |
114 |
243 |
141 |
23 |
0 |
0 |
| ODI |
0 |
13 |
24 |
192 |
139 |
11 |
0 |
0 |
| CDI |
0 |
0 |
10 |
145 |
410 |
320 |
1 |
0 |
| VCDI |
0 |
1 |
0 |
41 |
175 |
2020 |
5671 |
1895 |
|
Date: 2025-11-29:
| 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 |
79896 |
7116 |
131 |
221 |
23 |
0 |
0 |
0 |
| OW |
60 |
462 |
83 |
319 |
124 |
13 |
0 |
0 |
| VODI |
11 |
205 |
74 |
254 |
224 |
51 |
0 |
0 |
| ODI |
0 |
49 |
41 |
193 |
159 |
18 |
0 |
0 |
| CDI |
0 |
15 |
37 |
160 |
488 |
273 |
0 |
0 |
| VCDI |
0 |
1 |
0 |
91 |
278 |
2409 |
6399 |
538 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79895 |
7050 |
126 |
224 |
29 |
0 |
0 |
0 |
| OW |
55 |
517 |
87 |
301 |
97 |
16 |
0 |
0 |
| VODI |
17 |
209 |
71 |
273 |
220 |
45 |
0 |
0 |
| ODI |
0 |
49 |
39 |
178 |
181 |
22 |
0 |
0 |
| CDI |
0 |
21 |
41 |
170 |
487 |
275 |
0 |
0 |
| VCDI |
0 |
2 |
2 |
92 |
282 |
2406 |
6399 |
538 |
|
Date: 2025-12-01:
| 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 |
80037 |
6881 |
116 |
139 |
0 |
0 |
0 |
0 |
| OW |
46 |
667 |
157 |
316 |
43 |
3 |
0 |
0 |
| VODI |
16 |
233 |
69 |
357 |
142 |
30 |
0 |
0 |
| ODI |
0 |
43 |
23 |
142 |
307 |
18 |
0 |
0 |
| CDI |
0 |
23 |
25 |
130 |
492 |
601 |
14 |
0 |
| VCDI |
1 |
5 |
8 |
52 |
135 |
2143 |
6039 |
963 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79959 |
6557 |
81 |
165 |
6 |
0 |
0 |
0 |
| OW |
120 |
700 |
116 |
284 |
81 |
23 |
0 |
0 |
| VODI |
20 |
313 |
78 |
228 |
248 |
37 |
0 |
0 |
| ODI |
0 |
142 |
56 |
177 |
185 |
55 |
0 |
0 |
| CDI |
0 |
91 |
20 |
113 |
436 |
563 |
35 |
0 |
| VCDI |
1 |
49 |
47 |
169 |
163 |
2117 |
6018 |
963 |
|
Date: 2025-12-03:
| 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 |
79423 |
7361 |
112 |
112 |
3 |
0 |
0 |
0 |
| OW |
9 |
767 |
179 |
308 |
54 |
0 |
0 |
0 |
| VODI |
1 |
100 |
155 |
390 |
172 |
43 |
0 |
0 |
| ODI |
0 |
9 |
26 |
291 |
136 |
13 |
0 |
0 |
| CDI |
0 |
0 |
3 |
211 |
442 |
472 |
53 |
0 |
| VCDI |
0 |
0 |
0 |
88 |
213 |
1356 |
6363 |
1551 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79423 |
6901 |
97 |
140 |
0 |
0 |
0 |
0 |
| OW |
10 |
899 |
136 |
286 |
116 |
32 |
0 |
0 |
| VODI |
0 |
350 |
144 |
229 |
116 |
17 |
0 |
0 |
| ODI |
0 |
50 |
57 |
344 |
138 |
19 |
0 |
0 |
| CDI |
0 |
26 |
32 |
254 |
409 |
427 |
71 |
0 |
| VCDI |
0 |
11 |
9 |
147 |
241 |
1389 |
6345 |
1551 |
|
Date: 2025-12-05:
| 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 |
78065 |
8202 |
191 |
204 |
1 |
0 |
0 |
0 |
| OW |
8 |
564 |
208 |
442 |
106 |
30 |
0 |
0 |
| VODI |
1 |
50 |
106 |
483 |
141 |
86 |
0 |
0 |
| ODI |
0 |
1 |
4 |
295 |
219 |
23 |
0 |
0 |
| CDI |
0 |
0 |
0 |
127 |
609 |
451 |
94 |
0 |
| VCDI |
0 |
0 |
0 |
16 |
146 |
935 |
6549 |
2059 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78061 |
7812 |
173 |
224 |
1 |
0 |
0 |
0 |
| OW |
12 |
700 |
120 |
395 |
134 |
80 |
0 |
0 |
| VODI |
1 |
252 |
160 |
418 |
131 |
45 |
0 |
0 |
| ODI |
0 |
44 |
33 |
268 |
227 |
24 |
0 |
0 |
| CDI |
0 |
9 |
20 |
182 |
549 |
368 |
53 |
0 |
| VCDI |
0 |
0 |
3 |
80 |
180 |
1008 |
6590 |
2059 |
|
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