Validation of sea ice concentration - European sector
Bulletin date: 2025-08-14
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-08:
| 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 |
87005 |
3214 |
23 |
92 |
0 |
0 |
0 |
0 |
| OW |
214 |
1720 |
132 |
371 |
19 |
0 |
0 |
0 |
| VODI |
0 |
211 |
57 |
385 |
241 |
1 |
0 |
0 |
| ODI |
0 |
0 |
9 |
117 |
2046 |
39 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
803 |
2627 |
835 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
65 |
187 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-10:
| 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 |
87830 |
2787 |
25 |
34 |
0 |
0 |
0 |
0 |
| OW |
174 |
1732 |
151 |
265 |
25 |
0 |
0 |
0 |
| VODI |
1 |
224 |
47 |
364 |
183 |
1 |
0 |
0 |
| ODI |
0 |
5 |
25 |
127 |
2058 |
25 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
1308 |
2743 |
122 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
89 |
64 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-12:
| 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 |
88616 |
2962 |
57 |
44 |
0 |
0 |
0 |
0 |
| OW |
86 |
1283 |
156 |
307 |
10 |
0 |
0 |
0 |
| VODI |
0 |
34 |
10 |
360 |
181 |
1 |
0 |
0 |
| ODI |
0 |
0 |
1 |
18 |
2919 |
30 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
814 |
1870 |
477 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
105 |
74 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-14:
| 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 |
88429 |
3404 |
71 |
48 |
1 |
0 |
0 |
0 |
| OW |
62 |
1120 |
121 |
350 |
27 |
0 |
0 |
0 |
| VODI |
0 |
2 |
3 |
350 |
197 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
25 |
2813 |
143 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
435 |
2565 |
24 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
152 |
70 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88419 |
3519 |
100 |
98 |
1 |
0 |
0 |
0 |
| OW |
72 |
1005 |
86 |
295 |
31 |
0 |
0 |
0 |
| VODI |
0 |
2 |
9 |
352 |
185 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
28 |
2833 |
303 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
423 |
2431 |
22 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
126 |
72 |
0 |
|
Date: 2025-08-16:
| 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 |
88472 |
3519 |
47 |
22 |
0 |
0 |
0 |
0 |
| OW |
59 |
1037 |
154 |
236 |
38 |
0 |
0 |
0 |
| VODI |
0 |
9 |
31 |
374 |
219 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
89 |
2916 |
196 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
465 |
1860 |
99 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
564 |
9 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88468 |
3620 |
79 |
64 |
3 |
0 |
0 |
0 |
| OW |
63 |
925 |
116 |
212 |
35 |
0 |
0 |
0 |
| VODI |
0 |
19 |
37 |
344 |
202 |
1 |
0 |
0 |
| ODI |
0 |
1 |
0 |
101 |
2973 |
256 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
425 |
1725 |
99 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
639 |
9 |
0 |
|
Date: 2025-08-18:
| 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 |
89274 |
3321 |
30 |
5 |
0 |
0 |
0 |
0 |
| OW |
79 |
360 |
174 |
133 |
0 |
0 |
0 |
0 |
| VODI |
0 |
6 |
15 |
427 |
41 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
63 |
2947 |
22 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
540 |
2000 |
61 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
460 |
452 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89177 |
2937 |
59 |
29 |
0 |
0 |
0 |
0 |
| OW |
174 |
727 |
120 |
165 |
14 |
0 |
0 |
0 |
| VODI |
2 |
23 |
39 |
382 |
243 |
8 |
0 |
0 |
| ODI |
0 |
0 |
1 |
52 |
2943 |
284 |
3 |
0 |
| CDI |
0 |
0 |
0 |
2 |
331 |
1731 |
72 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
460 |
438 |
0 |
|
Date: 2025-08-20:
| 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 |
89039 |
3468 |
26 |
3 |
0 |
0 |
0 |
0 |
| OW |
48 |
338 |
161 |
179 |
0 |
0 |
0 |
0 |
| VODI |
0 |
6 |
13 |
428 |
109 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
53 |
2356 |
421 |
4 |
0 |
| CDI |
0 |
0 |
0 |
0 |
136 |
1871 |
657 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
29 |
956 |
114 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88959 |
3029 |
29 |
24 |
0 |
0 |
0 |
0 |
| OW |
127 |
769 |
133 |
144 |
4 |
1 |
0 |
0 |
| VODI |
1 |
14 |
38 |
453 |
269 |
9 |
1 |
0 |
| ODI |
0 |
0 |
0 |
42 |
2225 |
880 |
16 |
0 |
| CDI |
0 |
0 |
0 |
0 |
103 |
1407 |
634 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
25 |
966 |
114 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89224 |
2678 |
27 |
15 |
0 |
0 |
0 |
0 |
| OW |
105 |
781 |
99 |
218 |
0 |
1 |
0 |
0 |
| VODI |
1 |
27 |
52 |
460 |
317 |
4 |
0 |
0 |
| ODI |
0 |
0 |
0 |
44 |
1549 |
1175 |
28 |
0 |
| CDI |
0 |
0 |
0 |
0 |
364 |
1668 |
586 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
132 |
861 |
0 |
|
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