Validation of sea ice concentration - European sector
Bulletin date: 2025-09-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-29:
| 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 |
88438 |
2683 |
33 |
18 |
0 |
0 |
0 |
0 |
| OW |
2501 |
468 |
117 |
93 |
6 |
0 |
0 |
0 |
| VODI |
1324 |
145 |
124 |
329 |
111 |
1 |
0 |
0 |
| ODI |
0 |
2 |
7 |
152 |
1991 |
409 |
7 |
0 |
| CDI |
0 |
0 |
0 |
21 |
802 |
2431 |
366 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
85 |
198 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-31:
| 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 |
88587 |
2436 |
17 |
12 |
0 |
0 |
0 |
0 |
| OW |
2577 |
616 |
58 |
81 |
11 |
0 |
0 |
0 |
| VODI |
1183 |
280 |
167 |
284 |
53 |
6 |
0 |
0 |
| ODI |
0 |
7 |
11 |
378 |
2210 |
285 |
17 |
0 |
| CDI |
0 |
0 |
0 |
20 |
850 |
1928 |
463 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
70 |
255 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-02:
| 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 |
88537 |
2646 |
19 |
6 |
0 |
0 |
0 |
0 |
| OW |
2642 |
708 |
166 |
144 |
16 |
0 |
0 |
0 |
| VODI |
1163 |
14 |
60 |
522 |
99 |
3 |
0 |
0 |
| ODI |
0 |
0 |
2 |
268 |
1702 |
720 |
2 |
0 |
| CDI |
0 |
0 |
0 |
18 |
260 |
1701 |
199 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
209 |
1036 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-04:
| 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 |
88656 |
2664 |
30 |
10 |
3 |
0 |
0 |
0 |
| OW |
2710 |
618 |
184 |
146 |
24 |
0 |
0 |
0 |
| VODI |
1026 |
26 |
71 |
487 |
106 |
3 |
0 |
0 |
| ODI |
0 |
1 |
6 |
267 |
1702 |
757 |
7 |
0 |
| CDI |
0 |
0 |
0 |
0 |
233 |
1425 |
119 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
289 |
1289 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88658 |
2593 |
29 |
7 |
1 |
0 |
0 |
0 |
| OW |
2733 |
683 |
187 |
169 |
20 |
0 |
0 |
0 |
| VODI |
1001 |
32 |
69 |
445 |
111 |
3 |
0 |
0 |
| ODI |
0 |
1 |
6 |
286 |
1631 |
797 |
7 |
0 |
| CDI |
0 |
0 |
0 |
3 |
308 |
1416 |
168 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
258 |
1240 |
0 |
|
Date: 2025-09-06:
| 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 |
88733 |
2809 |
30 |
13 |
4 |
0 |
0 |
0 |
| OW |
2697 |
586 |
127 |
137 |
28 |
0 |
0 |
0 |
| VODI |
1040 |
53 |
73 |
406 |
118 |
1 |
0 |
0 |
| ODI |
0 |
0 |
1 |
197 |
1655 |
542 |
1 |
0 |
| CDI |
0 |
0 |
0 |
6 |
264 |
1237 |
324 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
492 |
1279 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88735 |
2743 |
31 |
14 |
0 |
0 |
0 |
0 |
| OW |
2725 |
643 |
123 |
142 |
30 |
0 |
0 |
0 |
| VODI |
1010 |
62 |
75 |
368 |
123 |
3 |
0 |
0 |
| ODI |
0 |
0 |
2 |
228 |
1559 |
568 |
20 |
0 |
| CDI |
0 |
0 |
0 |
7 |
359 |
1332 |
337 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
369 |
1247 |
0 |
|
Date: 2025-09-08:
| 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 |
88824 |
2666 |
30 |
15 |
8 |
0 |
0 |
0 |
| OW |
2685 |
594 |
123 |
140 |
46 |
0 |
0 |
0 |
| VODI |
1064 |
85 |
85 |
333 |
112 |
7 |
1 |
0 |
| ODI |
0 |
0 |
2 |
231 |
1325 |
594 |
8 |
0 |
| CDI |
0 |
0 |
0 |
2 |
272 |
1804 |
152 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
13 |
524 |
1115 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88825 |
2641 |
26 |
9 |
0 |
0 |
0 |
0 |
| OW |
2695 |
597 |
111 |
132 |
44 |
0 |
0 |
0 |
| VODI |
1053 |
106 |
97 |
344 |
132 |
5 |
0 |
0 |
| ODI |
0 |
1 |
6 |
234 |
1227 |
484 |
7 |
0 |
| CDI |
0 |
0 |
0 |
2 |
359 |
1931 |
132 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
14 |
509 |
1137 |
0 |
|
Date: 2025-09-10:
| 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 |
88832 |
2696 |
12 |
15 |
1 |
0 |
0 |
0 |
| OW |
2571 |
529 |
114 |
101 |
19 |
0 |
0 |
0 |
| VODI |
1199 |
50 |
96 |
490 |
94 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
162 |
885 |
229 |
0 |
0 |
| CDI |
0 |
0 |
0 |
5 |
663 |
2129 |
165 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
30 |
660 |
1115 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88839 |
2384 |
3 |
8 |
0 |
0 |
0 |
0 |
| OW |
2613 |
686 |
81 |
109 |
27 |
0 |
0 |
0 |
| VODI |
1150 |
204 |
121 |
337 |
88 |
1 |
0 |
0 |
| ODI |
0 |
1 |
17 |
314 |
952 |
445 |
4 |
0 |
| CDI |
0 |
0 |
0 |
5 |
597 |
1730 |
118 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
842 |
1158 |
0 |
|
Date: 2025-09-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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