Validation of sea ice concentration - European sector
Bulletin date: 2025-09-11
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-05:
| 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 |
90089 |
2536 |
7 |
38 |
0 |
0 |
0 |
0 |
| OW |
0 |
609 |
131 |
213 |
1 |
0 |
0 |
0 |
| VODI |
0 |
20 |
54 |
535 |
58 |
5 |
0 |
0 |
| ODI |
0 |
0 |
0 |
168 |
2037 |
396 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
261 |
1479 |
59 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
695 |
1025 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-07:
| 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 |
89939 |
2883 |
5 |
18 |
0 |
0 |
0 |
0 |
| OW |
1 |
546 |
122 |
180 |
0 |
0 |
0 |
0 |
| VODI |
0 |
38 |
64 |
522 |
48 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
174 |
1809 |
209 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
421 |
1579 |
44 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
663 |
1141 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-09:
| 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 |
88606 |
4196 |
53 |
25 |
1 |
0 |
0 |
0 |
| OW |
5 |
448 |
126 |
148 |
17 |
0 |
0 |
0 |
| VODI |
0 |
18 |
27 |
557 |
130 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
48 |
1123 |
111 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
749 |
2375 |
9 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
37 |
663 |
944 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-11:
| 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 |
89219 |
3478 |
29 |
11 |
0 |
0 |
0 |
0 |
| OW |
5 |
436 |
146 |
182 |
0 |
0 |
0 |
0 |
| VODI |
0 |
43 |
43 |
631 |
125 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
100 |
886 |
76 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
256 |
2004 |
82 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1615 |
1039 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89219 |
3443 |
35 |
8 |
0 |
0 |
0 |
0 |
| OW |
5 |
465 |
130 |
194 |
0 |
0 |
0 |
0 |
| VODI |
0 |
49 |
53 |
579 |
95 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
142 |
872 |
98 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
300 |
2308 |
123 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1289 |
998 |
0 |
|
Date: 2025-09-13:
| 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 |
89291 |
3300 |
23 |
11 |
0 |
0 |
0 |
0 |
| OW |
8 |
329 |
139 |
257 |
1 |
0 |
0 |
0 |
| VODI |
0 |
21 |
38 |
541 |
188 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
65 |
523 |
264 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
274 |
1960 |
15 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
1694 |
1451 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89290 |
3281 |
27 |
14 |
0 |
0 |
0 |
0 |
| OW |
9 |
344 |
126 |
247 |
1 |
0 |
0 |
0 |
| VODI |
0 |
24 |
47 |
527 |
158 |
0 |
0 |
0 |
| ODI |
0 |
1 |
0 |
84 |
519 |
252 |
0 |
0 |
| CDI |
0 |
0 |
0 |
8 |
314 |
2249 |
23 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
1417 |
1443 |
0 |
|
Date: 2025-09-15:
| 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 |
89262 |
3429 |
40 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
165 |
93 |
252 |
1 |
0 |
0 |
0 |
| VODI |
0 |
2 |
5 |
375 |
108 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
25 |
372 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
376 |
2536 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
16 |
2384 |
951 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89256 |
3316 |
51 |
49 |
0 |
0 |
0 |
0 |
| OW |
6 |
261 |
74 |
273 |
34 |
0 |
0 |
0 |
| VODI |
0 |
18 |
10 |
335 |
313 |
0 |
0 |
0 |
| ODI |
0 |
1 |
3 |
17 |
393 |
330 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
118 |
2034 |
2 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
2556 |
949 |
0 |
|
Date: 2025-09-17:
| 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 |
89749 |
2846 |
64 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
96 |
119 |
214 |
29 |
0 |
0 |
0 |
| VODI |
0 |
2 |
5 |
283 |
194 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
24 |
327 |
7 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
238 |
1967 |
5 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
2397 |
1813 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89743 |
2780 |
116 |
131 |
0 |
0 |
0 |
0 |
| OW |
6 |
142 |
60 |
237 |
146 |
0 |
0 |
0 |
| VODI |
0 |
18 |
6 |
150 |
343 |
18 |
0 |
0 |
| ODI |
0 |
4 |
5 |
23 |
227 |
311 |
0 |
0 |
| CDI |
0 |
0 |
1 |
6 |
77 |
1514 |
32 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
2528 |
1786 |
0 |
|
Date: 2025-09-19:
| 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 |
88979 |
3328 |
81 |
46 |
0 |
0 |
0 |
0 |
| OW |
0 |
136 |
92 |
197 |
35 |
0 |
0 |
0 |
| VODI |
0 |
5 |
11 |
228 |
227 |
6 |
0 |
0 |
| ODI |
0 |
1 |
2 |
36 |
295 |
43 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
196 |
1164 |
212 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
3370 |
1645 |
71 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88974 |
3283 |
111 |
256 |
35 |
0 |
0 |
0 |
| OW |
5 |
154 |
61 |
91 |
266 |
8 |
0 |
0 |
| VODI |
0 |
22 |
5 |
129 |
236 |
55 |
0 |
0 |
| ODI |
0 |
11 |
9 |
27 |
150 |
215 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
76 |
855 |
307 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3450 |
1550 |
71 |
|
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