Validation of sea ice concentration - European sector
Bulletin date: 2025-10-09
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-03:
| 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 |
87929 |
2937 |
16 |
4 |
0 |
0 |
0 |
0 |
| OW |
1904 |
269 |
58 |
86 |
6 |
0 |
0 |
0 |
| VODI |
1991 |
85 |
32 |
90 |
109 |
4 |
0 |
0 |
| ODI |
0 |
30 |
16 |
32 |
71 |
48 |
7 |
0 |
| CDI |
0 |
9 |
26 |
64 |
103 |
341 |
31 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
154 |
3035 |
3072 |
296 |
|
...date precedes bulletin
|
Date: 2025-10-05:
| 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 |
87816 |
2876 |
18 |
2 |
0 |
0 |
0 |
0 |
| OW |
1854 |
343 |
34 |
61 |
20 |
0 |
0 |
0 |
| VODI |
2057 |
106 |
37 |
108 |
105 |
5 |
0 |
0 |
| ODI |
0 |
36 |
21 |
42 |
86 |
54 |
9 |
0 |
| CDI |
0 |
16 |
17 |
58 |
123 |
378 |
183 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
26 |
2349 |
3764 |
257 |
|
...date precedes bulletin
|
Date: 2025-10-07:
| 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 |
87823 |
3002 |
22 |
13 |
1 |
0 |
0 |
0 |
| OW |
1755 |
471 |
55 |
28 |
10 |
0 |
0 |
0 |
| VODI |
2223 |
47 |
46 |
116 |
45 |
0 |
0 |
0 |
| ODI |
0 |
9 |
15 |
72 |
92 |
7 |
0 |
0 |
| CDI |
0 |
0 |
5 |
61 |
297 |
522 |
38 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
47 |
3245 |
2618 |
177 |
|
...date precedes bulletin
|
Date: 2025-10-09:
| 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 |
87910 |
3069 |
20 |
11 |
0 |
0 |
0 |
0 |
| OW |
1807 |
456 |
34 |
36 |
13 |
0 |
0 |
0 |
| VODI |
2117 |
151 |
23 |
57 |
46 |
10 |
0 |
0 |
| ODI |
0 |
81 |
28 |
49 |
50 |
37 |
2 |
0 |
| CDI |
0 |
32 |
49 |
143 |
225 |
430 |
184 |
0 |
| VCDI |
0 |
0 |
1 |
7 |
60 |
2397 |
3327 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87913 |
3174 |
25 |
15 |
2 |
0 |
0 |
0 |
| OW |
1808 |
354 |
32 |
37 |
16 |
0 |
0 |
0 |
| VODI |
2113 |
139 |
17 |
48 |
42 |
14 |
0 |
0 |
| ODI |
0 |
81 |
24 |
42 |
41 |
35 |
2 |
0 |
| CDI |
0 |
41 |
57 |
155 |
237 |
495 |
260 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
56 |
2330 |
3251 |
0 |
|
Date: 2025-10-11:
| 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 |
87017 |
3573 |
64 |
60 |
10 |
0 |
0 |
0 |
| OW |
1719 |
269 |
97 |
96 |
43 |
21 |
0 |
0 |
| VODI |
2269 |
30 |
56 |
125 |
73 |
27 |
3 |
0 |
| ODI |
0 |
5 |
11 |
88 |
105 |
56 |
15 |
0 |
| CDI |
0 |
0 |
5 |
78 |
211 |
233 |
277 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
36 |
1589 |
4595 |
6 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87017 |
3636 |
76 |
71 |
26 |
2 |
0 |
0 |
| OW |
1720 |
210 |
87 |
98 |
37 |
22 |
1 |
0 |
| VODI |
2268 |
27 |
55 |
107 |
68 |
32 |
3 |
0 |
| ODI |
0 |
4 |
10 |
86 |
81 |
48 |
14 |
0 |
| CDI |
0 |
0 |
5 |
84 |
216 |
211 |
239 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
50 |
1611 |
4633 |
6 |
|
Date: 2025-10-13:
| 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 |
86552 |
3828 |
66 |
22 |
0 |
0 |
0 |
0 |
| OW |
1691 |
216 |
174 |
164 |
25 |
0 |
0 |
0 |
| VODI |
2304 |
2 |
26 |
209 |
114 |
4 |
0 |
0 |
| ODI |
0 |
0 |
0 |
53 |
233 |
35 |
0 |
0 |
| CDI |
0 |
0 |
0 |
17 |
240 |
311 |
39 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
1881 |
4390 |
249 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
86552 |
3791 |
108 |
82 |
15 |
0 |
0 |
0 |
| OW |
1690 |
156 |
77 |
129 |
46 |
8 |
0 |
0 |
| VODI |
2305 |
70 |
41 |
102 |
103 |
30 |
2 |
0 |
| ODI |
0 |
22 |
20 |
60 |
129 |
42 |
12 |
0 |
| CDI |
0 |
7 |
20 |
74 |
191 |
173 |
125 |
0 |
| VCDI |
0 |
0 |
0 |
18 |
145 |
1978 |
4290 |
249 |
|
Date: 2025-10-15:
| 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 |
86252 |
3854 |
91 |
87 |
4 |
0 |
0 |
0 |
| OW |
1723 |
209 |
120 |
218 |
76 |
10 |
0 |
0 |
| VODI |
2218 |
18 |
48 |
165 |
141 |
48 |
0 |
0 |
| ODI |
0 |
1 |
3 |
103 |
140 |
49 |
3 |
0 |
| CDI |
0 |
0 |
0 |
69 |
248 |
335 |
123 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1471 |
4408 |
560 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
86192 |
3883 |
131 |
145 |
41 |
23 |
0 |
0 |
| OW |
1660 |
137 |
40 |
167 |
76 |
36 |
1 |
0 |
| VODI |
2341 |
59 |
59 |
91 |
119 |
42 |
12 |
0 |
| ODI |
0 |
3 |
31 |
67 |
100 |
49 |
17 |
0 |
| CDI |
0 |
0 |
1 |
93 |
148 |
247 |
135 |
0 |
| VCDI |
0 |
0 |
0 |
79 |
192 |
1516 |
4369 |
560 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
85656 |
3867 |
183 |
279 |
118 |
29 |
0 |
0 |
| OW |
1636 |
26 |
50 |
154 |
159 |
88 |
1 |
0 |
| VODI |
2368 |
1 |
5 |
93 |
187 |
155 |
12 |
0 |
| ODI |
0 |
0 |
0 |
41 |
105 |
131 |
12 |
0 |
| CDI |
0 |
0 |
0 |
28 |
81 |
377 |
185 |
0 |
| VCDI |
0 |
0 |
0 |
16 |
145 |
3040 |
3554 |
80 |
|
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