Validation of sea ice concentration - European sector
Bulletin date: 2025-12-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-28:
| 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 |
78615 |
7048 |
102 |
113 |
10 |
0 |
0 |
0 |
| OW |
1064 |
525 |
116 |
189 |
89 |
26 |
0 |
0 |
| VODI |
3346 |
182 |
101 |
180 |
143 |
65 |
0 |
0 |
| ODI |
0 |
53 |
30 |
131 |
129 |
56 |
0 |
0 |
| CDI |
0 |
57 |
27 |
97 |
203 |
484 |
12 |
0 |
| VCDI |
0 |
35 |
18 |
88 |
125 |
2091 |
7294 |
18 |
|
...date precedes bulletin
|
Date: 2025-11-30:
| 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 |
78485 |
6581 |
186 |
158 |
22 |
0 |
0 |
0 |
| OW |
1070 |
639 |
126 |
154 |
96 |
28 |
0 |
0 |
| VODI |
3340 |
357 |
62 |
156 |
168 |
132 |
0 |
0 |
| ODI |
0 |
168 |
48 |
106 |
107 |
63 |
0 |
0 |
| CDI |
0 |
115 |
40 |
120 |
186 |
575 |
38 |
0 |
| VCDI |
0 |
40 |
28 |
116 |
146 |
2668 |
6536 |
2 |
|
...date precedes bulletin
|
Date: 2025-12-02:
| 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 |
78506 |
6672 |
70 |
72 |
7 |
0 |
0 |
0 |
| OW |
1038 |
925 |
123 |
135 |
59 |
1 |
0 |
0 |
| VODI |
3351 |
297 |
135 |
231 |
157 |
51 |
3 |
0 |
| ODI |
0 |
46 |
38 |
171 |
168 |
36 |
0 |
0 |
| CDI |
0 |
42 |
30 |
142 |
276 |
639 |
160 |
0 |
| VCDI |
0 |
32 |
41 |
81 |
102 |
2116 |
6909 |
0 |
|
...date precedes bulletin
|
Date: 2025-12-04:
| 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 |
77003 |
7957 |
76 |
90 |
5 |
0 |
0 |
0 |
| OW |
994 |
775 |
169 |
252 |
89 |
17 |
0 |
0 |
| VODI |
3093 |
164 |
151 |
288 |
168 |
110 |
2 |
0 |
| ODI |
281 |
34 |
31 |
175 |
178 |
49 |
1 |
0 |
| CDI |
0 |
10 |
30 |
111 |
283 |
520 |
207 |
0 |
| VCDI |
0 |
0 |
3 |
84 |
170 |
1280 |
7429 |
583 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
77001 |
7973 |
74 |
96 |
5 |
0 |
0 |
0 |
| OW |
996 |
776 |
179 |
248 |
99 |
16 |
0 |
0 |
| VODI |
3122 |
148 |
142 |
287 |
156 |
113 |
2 |
0 |
| ODI |
252 |
33 |
31 |
176 |
194 |
48 |
1 |
0 |
| CDI |
0 |
10 |
31 |
96 |
264 |
526 |
220 |
0 |
| VCDI |
0 |
0 |
3 |
97 |
175 |
1273 |
7416 |
583 |
|
Date: 2025-12-06:
| 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 |
76092 |
8367 |
131 |
155 |
53 |
0 |
0 |
0 |
| OW |
978 |
748 |
157 |
244 |
139 |
38 |
0 |
0 |
| VODI |
2819 |
206 |
137 |
239 |
149 |
101 |
1 |
0 |
| ODI |
573 |
18 |
51 |
245 |
204 |
70 |
3 |
0 |
| CDI |
0 |
0 |
8 |
119 |
444 |
501 |
241 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
92 |
1111 |
7767 |
657 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76088 |
8413 |
144 |
181 |
64 |
0 |
0 |
0 |
| OW |
984 |
730 |
149 |
216 |
137 |
41 |
0 |
0 |
| VODI |
2833 |
179 |
142 |
266 |
136 |
97 |
1 |
0 |
| ODI |
557 |
17 |
44 |
242 |
220 |
71 |
6 |
0 |
| CDI |
0 |
0 |
5 |
96 |
402 |
471 |
254 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
122 |
1141 |
7751 |
657 |
|
Date: 2025-12-08:
| 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 |
75415 |
8781 |
222 |
239 |
96 |
11 |
0 |
0 |
| OW |
970 |
638 |
123 |
252 |
176 |
45 |
3 |
0 |
| VODI |
2704 |
193 |
107 |
215 |
205 |
68 |
8 |
0 |
| ODI |
701 |
25 |
49 |
174 |
191 |
91 |
30 |
0 |
| CDI |
0 |
3 |
14 |
109 |
348 |
532 |
171 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
108 |
929 |
7712 |
1197 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75411 |
8646 |
212 |
207 |
89 |
12 |
0 |
0 |
| OW |
973 |
696 |
106 |
241 |
164 |
51 |
3 |
0 |
| VODI |
2703 |
245 |
134 |
244 |
203 |
59 |
7 |
0 |
| ODI |
703 |
51 |
48 |
199 |
242 |
82 |
25 |
0 |
| CDI |
0 |
2 |
15 |
95 |
308 |
624 |
163 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
118 |
848 |
7726 |
1197 |
|
Date: 2025-12-10:
| 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 |
74175 |
10060 |
226 |
142 |
58 |
14 |
0 |
0 |
| OW |
963 |
517 |
170 |
279 |
110 |
18 |
0 |
0 |
| VODI |
2614 |
60 |
105 |
287 |
180 |
40 |
5 |
0 |
| ODI |
802 |
4 |
24 |
171 |
255 |
74 |
24 |
0 |
| CDI |
0 |
0 |
6 |
85 |
435 |
681 |
225 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
164 |
755 |
7756 |
1373 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
74111 |
9576 |
225 |
197 |
51 |
14 |
0 |
0 |
| OW |
1018 |
679 |
102 |
211 |
216 |
39 |
3 |
0 |
| VODI |
2588 |
301 |
107 |
240 |
200 |
73 |
19 |
0 |
| ODI |
837 |
71 |
71 |
190 |
212 |
98 |
28 |
0 |
| CDI |
0 |
14 |
25 |
119 |
324 |
513 |
238 |
0 |
| VCDI |
0 |
0 |
1 |
12 |
199 |
845 |
7722 |
1373 |
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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