Validation of sea ice concentration - European sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. multi-product 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 |
85127 |
4862 |
99 |
49 |
0 |
0 |
0 |
0 |
| OW |
0 |
150 |
113 |
133 |
6 |
0 |
0 |
0 |
| VODI |
0 |
28 |
46 |
256 |
79 |
0 |
0 |
0 |
| ODI |
0 |
0 |
6 |
102 |
200 |
26 |
0 |
0 |
| CDI |
0 |
0 |
0 |
47 |
323 |
195 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
51 |
2196 |
6025 |
297 |
|
...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 |
84116 |
5484 |
182 |
148 |
0 |
0 |
0 |
0 |
| OW |
0 |
137 |
151 |
194 |
11 |
0 |
0 |
0 |
| VODI |
0 |
21 |
31 |
241 |
101 |
13 |
0 |
0 |
| ODI |
0 |
0 |
2 |
104 |
141 |
36 |
0 |
0 |
| CDI |
0 |
0 |
0 |
30 |
309 |
294 |
2 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
32 |
1755 |
6570 |
311 |
|
...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 |
84949 |
4777 |
112 |
69 |
0 |
0 |
0 |
0 |
| OW |
3 |
180 |
107 |
215 |
20 |
0 |
0 |
0 |
| VODI |
0 |
4 |
22 |
181 |
96 |
0 |
0 |
0 |
| ODI |
0 |
0 |
3 |
83 |
145 |
39 |
0 |
0 |
| CDI |
0 |
0 |
0 |
40 |
284 |
233 |
40 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
88 |
2423 |
6027 |
266 |
|
...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 |
84241 |
5285 |
183 |
158 |
3 |
0 |
0 |
0 |
| OW |
0 |
113 |
86 |
220 |
50 |
0 |
0 |
0 |
| VODI |
0 |
1 |
16 |
200 |
83 |
8 |
0 |
0 |
| ODI |
0 |
0 |
0 |
102 |
110 |
43 |
0 |
0 |
| CDI |
0 |
0 |
0 |
54 |
305 |
227 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
69 |
2461 |
6302 |
96 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84241 |
5298 |
191 |
191 |
4 |
0 |
0 |
0 |
| OW |
0 |
99 |
71 |
209 |
55 |
0 |
0 |
0 |
| VODI |
0 |
2 |
23 |
175 |
77 |
6 |
0 |
0 |
| ODI |
0 |
0 |
0 |
98 |
99 |
37 |
0 |
0 |
| CDI |
0 |
0 |
0 |
61 |
310 |
238 |
3 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
75 |
2458 |
6299 |
96 |
|
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 |
83547 |
5746 |
179 |
135 |
1 |
0 |
0 |
0 |
| OW |
0 |
62 |
75 |
272 |
39 |
0 |
0 |
0 |
| VODI |
0 |
3 |
12 |
240 |
61 |
7 |
0 |
0 |
| ODI |
0 |
0 |
0 |
102 |
136 |
43 |
0 |
0 |
| CDI |
0 |
0 |
0 |
33 |
359 |
255 |
11 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
69 |
2563 |
6145 |
319 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83547 |
5779 |
196 |
168 |
3 |
0 |
0 |
0 |
| OW |
0 |
31 |
59 |
242 |
37 |
0 |
0 |
0 |
| VODI |
0 |
1 |
11 |
239 |
65 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
106 |
122 |
36 |
0 |
0 |
| CDI |
0 |
0 |
0 |
27 |
366 |
272 |
10 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
72 |
2557 |
6146 |
319 |
|
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 |
83538 |
5777 |
134 |
126 |
9 |
0 |
0 |
0 |
| OW |
0 |
114 |
176 |
220 |
37 |
0 |
0 |
0 |
| VODI |
0 |
0 |
1 |
247 |
64 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
103 |
128 |
6 |
0 |
0 |
| CDI |
0 |
0 |
0 |
33 |
366 |
166 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
72 |
1789 |
6893 |
417 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83538 |
5718 |
122 |
135 |
10 |
0 |
0 |
0 |
| OW |
0 |
132 |
83 |
107 |
36 |
0 |
0 |
0 |
| VODI |
0 |
41 |
91 |
165 |
51 |
0 |
0 |
0 |
| ODI |
0 |
0 |
13 |
164 |
66 |
8 |
0 |
0 |
| CDI |
0 |
0 |
2 |
153 |
329 |
135 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
184 |
1818 |
6893 |
417 |
|
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 |
83416 |
5524 |
105 |
177 |
24 |
0 |
0 |
0 |
| OW |
13 |
120 |
107 |
188 |
84 |
3 |
0 |
0 |
| VODI |
0 |
0 |
26 |
235 |
98 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
129 |
146 |
3 |
0 |
0 |
| CDI |
0 |
0 |
0 |
38 |
422 |
334 |
6 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
1394 |
7125 |
676 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83427 |
5377 |
68 |
199 |
30 |
0 |
0 |
0 |
| OW |
2 |
204 |
66 |
74 |
77 |
2 |
0 |
0 |
| VODI |
0 |
53 |
88 |
154 |
75 |
1 |
0 |
0 |
| ODI |
0 |
10 |
16 |
204 |
97 |
2 |
0 |
0 |
| CDI |
0 |
0 |
0 |
134 |
451 |
398 |
23 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
67 |
1331 |
7108 |
676 |
|
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 |
82895 |
5627 |
79 |
125 |
26 |
0 |
0 |
0 |
| OW |
49 |
221 |
109 |
174 |
106 |
7 |
0 |
0 |
| VODI |
0 |
17 |
53 |
267 |
118 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
106 |
222 |
30 |
0 |
0 |
| CDI |
0 |
0 |
0 |
16 |
374 |
537 |
29 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1516 |
7524 |
162 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82942 |
5557 |
102 |
168 |
58 |
0 |
0 |
0 |
| OW |
2 |
236 |
60 |
134 |
70 |
11 |
0 |
0 |
| VODI |
0 |
71 |
68 |
218 |
94 |
21 |
0 |
0 |
| ODI |
0 |
1 |
11 |
122 |
191 |
14 |
0 |
0 |
| CDI |
0 |
0 |
0 |
46 |
415 |
347 |
1 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
21 |
1721 |
7552 |
162 |
|
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