Validation of sea ice concentration - European sector
Bulletin date: 2025-10-23
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-17:
| 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 |
85656 |
3721 |
126 |
137 |
18 |
0 |
0 |
0 |
| OW |
1644 |
155 |
79 |
256 |
89 |
24 |
0 |
0 |
| VODI |
2360 |
18 |
33 |
145 |
251 |
127 |
0 |
0 |
| ODI |
0 |
0 |
0 |
52 |
206 |
186 |
9 |
0 |
| CDI |
0 |
0 |
0 |
21 |
178 |
540 |
110 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
53 |
2943 |
3645 |
80 |
|
...date precedes bulletin
|
Date: 2025-10-19:
| 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 |
85143 |
3673 |
101 |
193 |
60 |
2 |
0 |
0 |
| OW |
1617 |
199 |
70 |
164 |
174 |
7 |
0 |
0 |
| VODI |
2392 |
15 |
42 |
168 |
294 |
82 |
0 |
0 |
| ODI |
0 |
0 |
0 |
29 |
295 |
275 |
0 |
0 |
| CDI |
0 |
0 |
0 |
12 |
159 |
750 |
48 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
62 |
4080 |
2720 |
24 |
|
...date precedes bulletin
|
Date: 2025-10-21:
| 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 |
84247 |
4600 |
108 |
109 |
1 |
0 |
0 |
0 |
| OW |
1570 |
165 |
85 |
163 |
69 |
3 |
0 |
0 |
| VODI |
2448 |
9 |
29 |
211 |
256 |
8 |
0 |
0 |
| ODI |
0 |
0 |
0 |
35 |
369 |
70 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
368 |
968 |
31 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
54 |
3845 |
2874 |
164 |
|
...date precedes bulletin
|
Date: 2025-10-23:
| 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 |
84405 |
4131 |
123 |
212 |
32 |
0 |
0 |
0 |
| OW |
1469 |
166 |
65 |
142 |
135 |
1 |
0 |
0 |
| VODI |
2625 |
12 |
24 |
98 |
284 |
21 |
0 |
0 |
| ODI |
0 |
0 |
3 |
43 |
269 |
73 |
2 |
0 |
| CDI |
0 |
0 |
0 |
4 |
315 |
558 |
190 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
70 |
2735 |
4655 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84405 |
4138 |
120 |
194 |
33 |
0 |
0 |
0 |
| OW |
1474 |
159 |
70 |
154 |
107 |
0 |
0 |
0 |
| VODI |
2620 |
12 |
22 |
103 |
305 |
20 |
0 |
0 |
| ODI |
0 |
0 |
3 |
39 |
269 |
69 |
0 |
0 |
| CDI |
0 |
0 |
0 |
9 |
326 |
636 |
192 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
65 |
2663 |
4655 |
0 |
|
Date: 2025-10-25:
| 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 |
84209 |
4211 |
97 |
183 |
25 |
0 |
0 |
0 |
| OW |
1427 |
132 |
73 |
153 |
128 |
6 |
0 |
0 |
| VODI |
2676 |
19 |
19 |
92 |
200 |
85 |
1 |
0 |
| ODI |
0 |
0 |
4 |
28 |
163 |
153 |
4 |
0 |
| CDI |
0 |
0 |
0 |
3 |
171 |
549 |
148 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
35 |
1829 |
5554 |
485 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84209 |
4204 |
96 |
202 |
28 |
0 |
0 |
0 |
| OW |
1432 |
138 |
71 |
126 |
121 |
4 |
0 |
0 |
| VODI |
2671 |
20 |
22 |
100 |
212 |
69 |
0 |
0 |
| ODI |
0 |
0 |
4 |
28 |
169 |
138 |
3 |
0 |
| CDI |
0 |
0 |
0 |
3 |
152 |
587 |
150 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
40 |
1824 |
5554 |
485 |
|
Date: 2025-10-27:
| 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 |
83509 |
4657 |
159 |
163 |
50 |
0 |
0 |
0 |
| OW |
1403 |
52 |
82 |
157 |
117 |
7 |
0 |
0 |
| VODI |
2716 |
11 |
21 |
105 |
243 |
59 |
2 |
0 |
| ODI |
0 |
0 |
1 |
27 |
227 |
322 |
22 |
0 |
| CDI |
0 |
0 |
0 |
3 |
68 |
315 |
122 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
980 |
6745 |
498 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83440 |
4586 |
152 |
195 |
102 |
0 |
0 |
0 |
| OW |
1333 |
110 |
62 |
118 |
116 |
22 |
0 |
0 |
| VODI |
2855 |
19 |
43 |
90 |
155 |
100 |
0 |
0 |
| ODI |
0 |
5 |
6 |
42 |
152 |
123 |
19 |
0 |
| CDI |
0 |
0 |
0 |
10 |
160 |
389 |
238 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1049 |
6634 |
498 |
|
Date: 2025-10-29:
| 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 |
84090 |
4240 |
95 |
58 |
6 |
0 |
0 |
0 |
| OW |
1349 |
111 |
73 |
115 |
43 |
5 |
0 |
0 |
| VODI |
2782 |
32 |
50 |
139 |
152 |
43 |
3 |
0 |
| ODI |
0 |
3 |
13 |
63 |
221 |
110 |
26 |
0 |
| CDI |
0 |
0 |
1 |
25 |
151 |
291 |
86 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
104 |
1568 |
6574 |
240 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
84094 |
4149 |
87 |
91 |
14 |
0 |
0 |
0 |
| OW |
1361 |
155 |
72 |
89 |
66 |
3 |
0 |
0 |
| VODI |
2766 |
58 |
52 |
105 |
132 |
44 |
0 |
0 |
| ODI |
0 |
19 |
14 |
79 |
127 |
106 |
12 |
0 |
| CDI |
0 |
5 |
7 |
36 |
227 |
341 |
188 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
111 |
1523 |
6489 |
240 |
|
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 |
83793 |
4710 |
34 |
26 |
0 |
0 |
0 |
0 |
| OW |
1312 |
270 |
70 |
52 |
6 |
0 |
0 |
0 |
| VODI |
2825 |
75 |
67 |
152 |
95 |
12 |
0 |
0 |
| ODI |
0 |
19 |
19 |
66 |
150 |
70 |
5 |
0 |
| CDI |
0 |
5 |
13 |
37 |
154 |
295 |
53 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1318 |
6825 |
295 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83796 |
4513 |
48 |
44 |
0 |
0 |
0 |
0 |
| OW |
1331 |
316 |
34 |
35 |
12 |
0 |
0 |
0 |
| VODI |
2803 |
153 |
63 |
100 |
48 |
17 |
0 |
0 |
| ODI |
0 |
46 |
27 |
83 |
107 |
43 |
5 |
0 |
| CDI |
0 |
51 |
30 |
64 |
217 |
290 |
70 |
0 |
| VCDI |
0 |
0 |
1 |
7 |
60 |
1345 |
6808 |
295 |
|
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