Validation of sea ice concentration - European sector
Bulletin date: 2025-09-18
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-12:
| 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 |
88810 |
3831 |
20 |
16 |
0 |
0 |
0 |
0 |
| OW |
8 |
373 |
130 |
258 |
0 |
0 |
0 |
0 |
| VODI |
0 |
30 |
23 |
566 |
199 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
40 |
610 |
298 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
202 |
1917 |
80 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
1651 |
1336 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-14:
| 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 |
88951 |
3623 |
30 |
16 |
0 |
0 |
0 |
0 |
| OW |
6 |
319 |
140 |
222 |
18 |
0 |
0 |
0 |
| VODI |
0 |
13 |
36 |
438 |
275 |
1 |
0 |
0 |
| ODI |
0 |
0 |
1 |
33 |
359 |
371 |
0 |
0 |
| CDI |
0 |
0 |
0 |
9 |
55 |
2094 |
17 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
20 |
1700 |
1669 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-16:
| 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 |
89848 |
2842 |
31 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
161 |
133 |
160 |
2 |
0 |
0 |
0 |
| VODI |
0 |
3 |
13 |
387 |
114 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
39 |
324 |
2 |
0 |
0 |
| CDI |
0 |
0 |
0 |
5 |
279 |
2138 |
1 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
2565 |
1326 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-18:
| 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 |
89590 |
2834 |
70 |
60 |
0 |
0 |
0 |
0 |
| OW |
0 |
106 |
103 |
178 |
66 |
1 |
0 |
0 |
| VODI |
0 |
8 |
2 |
220 |
184 |
64 |
0 |
0 |
| ODI |
0 |
0 |
0 |
23 |
270 |
75 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
109 |
1532 |
53 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
8 |
3011 |
1836 |
13 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89589 |
2804 |
73 |
77 |
0 |
0 |
0 |
0 |
| OW |
1 |
135 |
95 |
160 |
70 |
2 |
0 |
0 |
| VODI |
0 |
8 |
6 |
224 |
195 |
63 |
0 |
0 |
| ODI |
0 |
1 |
1 |
20 |
265 |
79 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
101 |
1593 |
84 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
2946 |
1805 |
13 |
|
Date: 2025-09-20:
| 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 |
89482 |
2731 |
62 |
37 |
0 |
0 |
0 |
0 |
| OW |
0 |
189 |
73 |
187 |
30 |
0 |
0 |
0 |
| VODI |
0 |
7 |
20 |
244 |
215 |
7 |
0 |
0 |
| ODI |
0 |
0 |
2 |
38 |
321 |
22 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
253 |
1323 |
6 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
27 |
3330 |
1724 |
85 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89480 |
2723 |
65 |
50 |
0 |
0 |
0 |
0 |
| OW |
2 |
194 |
65 |
180 |
33 |
0 |
0 |
0 |
| VODI |
0 |
10 |
25 |
235 |
233 |
8 |
0 |
0 |
| ODI |
0 |
0 |
2 |
39 |
339 |
22 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
217 |
1338 |
10 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
3314 |
1720 |
85 |
|
Date: 2025-09-22:
| 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 |
89024 |
3338 |
72 |
27 |
0 |
0 |
0 |
0 |
| OW |
0 |
201 |
112 |
167 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
11 |
278 |
83 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
97 |
260 |
15 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
441 |
306 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1572 |
4249 |
122 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89024 |
3218 |
76 |
68 |
2 |
0 |
0 |
0 |
| OW |
0 |
223 |
53 |
146 |
55 |
0 |
0 |
0 |
| VODI |
0 |
95 |
47 |
152 |
123 |
41 |
0 |
0 |
| ODI |
0 |
3 |
19 |
149 |
125 |
28 |
0 |
0 |
| CDI |
0 |
0 |
0 |
56 |
412 |
159 |
5 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
106 |
1665 |
4244 |
122 |
|
Date: 2025-09-24:
| 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 |
88520 |
3823 |
89 |
61 |
0 |
0 |
0 |
0 |
| OW |
0 |
144 |
130 |
179 |
9 |
0 |
0 |
0 |
| VODI |
0 |
2 |
2 |
262 |
122 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
41 |
226 |
51 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
326 |
388 |
13 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1730 |
4108 |
180 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88520 |
3642 |
91 |
107 |
2 |
0 |
0 |
0 |
| OW |
0 |
246 |
46 |
119 |
90 |
1 |
0 |
0 |
| VODI |
0 |
81 |
69 |
142 |
83 |
75 |
0 |
0 |
| ODI |
0 |
0 |
15 |
138 |
134 |
38 |
0 |
0 |
| CDI |
0 |
0 |
0 |
37 |
332 |
279 |
13 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
52 |
1776 |
4108 |
180 |
|
Date: 2025-09-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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