Validation of sea ice concentration - European sector
Bulletin date: 2025-08-28
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-22:
| 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 |
89283 |
3117 |
26 |
9 |
0 |
0 |
0 |
0 |
| OW |
47 |
363 |
134 |
202 |
3 |
0 |
0 |
0 |
| VODI |
0 |
6 |
18 |
459 |
157 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
67 |
1638 |
803 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
432 |
2042 |
574 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
134 |
900 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-24:
| 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 |
87711 |
4652 |
25 |
35 |
0 |
0 |
0 |
0 |
| OW |
45 |
433 |
136 |
142 |
0 |
0 |
0 |
0 |
| VODI |
0 |
29 |
51 |
446 |
138 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
79 |
1874 |
589 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
395 |
2145 |
356 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
71 |
1061 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-26:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2025-08-28:
| 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 |
89015 |
3475 |
14 |
39 |
0 |
0 |
0 |
0 |
| OW |
0 |
351 |
114 |
179 |
6 |
0 |
0 |
0 |
| VODI |
0 |
37 |
57 |
467 |
86 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
118 |
1883 |
541 |
2 |
0 |
| CDI |
0 |
0 |
0 |
0 |
616 |
2640 |
302 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
195 |
276 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89013 |
3426 |
15 |
48 |
0 |
0 |
0 |
0 |
| OW |
2 |
385 |
108 |
159 |
5 |
0 |
0 |
0 |
| VODI |
0 |
51 |
61 |
479 |
94 |
0 |
0 |
0 |
| ODI |
0 |
1 |
1 |
117 |
1639 |
351 |
4 |
0 |
| CDI |
0 |
0 |
0 |
0 |
852 |
2876 |
299 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
150 |
277 |
0 |
|
Date: 2025-08-30:
| 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 |
89874 |
2441 |
18 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
520 |
74 |
135 |
8 |
0 |
0 |
0 |
| VODI |
0 |
171 |
130 |
418 |
54 |
1 |
0 |
0 |
| ODI |
0 |
0 |
4 |
226 |
2243 |
274 |
7 |
0 |
| CDI |
0 |
0 |
0 |
0 |
781 |
2255 |
465 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
74 |
219 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89874 |
2413 |
18 |
32 |
0 |
0 |
0 |
0 |
| OW |
0 |
520 |
79 |
123 |
4 |
0 |
0 |
0 |
| VODI |
0 |
197 |
120 |
446 |
54 |
1 |
0 |
0 |
| ODI |
0 |
2 |
9 |
201 |
1836 |
296 |
11 |
0 |
| CDI |
0 |
0 |
0 |
1 |
1192 |
2191 |
433 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
116 |
247 |
0 |
|
Date: 2025-09-01:
| 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 |
89695 |
2583 |
26 |
13 |
0 |
0 |
0 |
0 |
| OW |
6 |
586 |
45 |
113 |
5 |
0 |
0 |
0 |
| VODI |
0 |
288 |
151 |
294 |
30 |
5 |
0 |
0 |
| ODI |
0 |
19 |
31 |
421 |
1984 |
251 |
23 |
0 |
| CDI |
0 |
0 |
0 |
15 |
1120 |
1667 |
722 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
132 |
191 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89692 |
2520 |
16 |
4 |
0 |
0 |
0 |
0 |
| OW |
9 |
618 |
53 |
104 |
2 |
0 |
0 |
0 |
| VODI |
0 |
327 |
159 |
334 |
34 |
3 |
0 |
0 |
| ODI |
0 |
11 |
25 |
400 |
1826 |
244 |
17 |
0 |
| CDI |
0 |
0 |
0 |
14 |
1275 |
1615 |
676 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
193 |
243 |
0 |
|
Date: 2025-09-03:
| 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 |
89713 |
2688 |
24 |
15 |
0 |
0 |
0 |
0 |
| OW |
0 |
763 |
163 |
176 |
0 |
0 |
0 |
0 |
| VODI |
0 |
23 |
75 |
549 |
34 |
4 |
0 |
0 |
| ODI |
0 |
0 |
0 |
258 |
2036 |
472 |
0 |
0 |
| CDI |
0 |
0 |
0 |
5 |
484 |
1413 |
121 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
344 |
1053 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89701 |
2396 |
8 |
9 |
0 |
0 |
0 |
0 |
| OW |
12 |
707 |
66 |
122 |
0 |
0 |
0 |
0 |
| VODI |
0 |
356 |
156 |
347 |
21 |
5 |
0 |
0 |
| ODI |
0 |
15 |
32 |
500 |
1389 |
552 |
22 |
0 |
| CDI |
0 |
0 |
0 |
25 |
1145 |
1417 |
597 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
259 |
555 |
0 |
|
Date: 2025-09-05:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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