Validation of sea ice concentration - European sector
Bulletin date: 2025-08-21
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-15:
| 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 |
88915 |
3031 |
67 |
37 |
0 |
0 |
0 |
0 |
| OW |
62 |
1102 |
120 |
255 |
26 |
0 |
0 |
0 |
| VODI |
0 |
7 |
37 |
319 |
225 |
1 |
0 |
0 |
| ODI |
0 |
0 |
2 |
64 |
2888 |
191 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
492 |
2228 |
2 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
256 |
89 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-17:
| 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 |
88384 |
3613 |
36 |
12 |
0 |
0 |
0 |
0 |
| OW |
54 |
985 |
157 |
233 |
30 |
0 |
0 |
0 |
| VODI |
0 |
5 |
36 |
386 |
266 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
44 |
2715 |
480 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
158 |
1805 |
285 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
453 |
278 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-19:
| 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 |
88860 |
3660 |
24 |
7 |
0 |
0 |
0 |
0 |
| OW |
69 |
337 |
150 |
184 |
0 |
0 |
0 |
0 |
| VODI |
0 |
7 |
7 |
415 |
89 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
53 |
2793 |
309 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
206 |
1904 |
277 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
71 |
985 |
6 |
|
...date precedes bulletin
|
Date: 2025-08-21:
| 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 |
89319 |
3129 |
31 |
21 |
0 |
0 |
0 |
0 |
| OW |
44 |
365 |
161 |
167 |
2 |
0 |
0 |
0 |
| VODI |
0 |
5 |
16 |
425 |
132 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
38 |
1994 |
504 |
7 |
0 |
| CDI |
0 |
0 |
0 |
0 |
229 |
2034 |
772 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
102 |
910 |
7 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89317 |
3127 |
37 |
34 |
0 |
0 |
0 |
0 |
| OW |
46 |
366 |
156 |
160 |
2 |
0 |
0 |
0 |
| VODI |
0 |
6 |
15 |
411 |
129 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
46 |
1994 |
423 |
10 |
0 |
| CDI |
0 |
0 |
0 |
0 |
232 |
2130 |
792 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
87 |
887 |
7 |
|
Date: 2025-08-23:
| 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 |
88647 |
3729 |
16 |
30 |
0 |
0 |
0 |
0 |
| OW |
45 |
378 |
158 |
170 |
0 |
0 |
0 |
0 |
| VODI |
0 |
15 |
24 |
469 |
152 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
55 |
1845 |
839 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
358 |
1944 |
414 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
63 |
1047 |
16 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88648 |
3754 |
23 |
46 |
0 |
0 |
0 |
0 |
| OW |
44 |
355 |
150 |
156 |
3 |
0 |
0 |
0 |
| VODI |
0 |
13 |
25 |
467 |
142 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
54 |
1657 |
811 |
1 |
0 |
| CDI |
0 |
0 |
0 |
1 |
555 |
1987 |
469 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
48 |
991 |
16 |
|
Date: 2025-08-25:
| 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 |
88468 |
4128 |
24 |
26 |
0 |
0 |
0 |
0 |
| OW |
1 |
244 |
172 |
198 |
1 |
0 |
0 |
0 |
| VODI |
0 |
1 |
7 |
455 |
73 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
58 |
2189 |
106 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
311 |
2720 |
106 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
145 |
978 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88438 |
3917 |
25 |
30 |
0 |
0 |
0 |
0 |
| OW |
31 |
424 |
98 |
137 |
6 |
0 |
0 |
0 |
| VODI |
0 |
30 |
78 |
453 |
144 |
0 |
0 |
0 |
| ODI |
0 |
2 |
2 |
113 |
2025 |
327 |
10 |
0 |
| CDI |
0 |
0 |
0 |
4 |
402 |
2552 |
215 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
92 |
859 |
0 |
|
Date: 2025-08-27:
| 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 |
88998 |
3555 |
20 |
36 |
0 |
0 |
0 |
0 |
| OW |
0 |
296 |
151 |
177 |
4 |
0 |
0 |
0 |
| VODI |
0 |
15 |
36 |
476 |
61 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
137 |
2091 |
228 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
520 |
2537 |
420 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
111 |
544 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88983 |
3290 |
19 |
37 |
0 |
0 |
0 |
0 |
| OW |
15 |
484 |
78 |
127 |
20 |
0 |
0 |
0 |
| VODI |
0 |
87 |
106 |
474 |
111 |
0 |
0 |
0 |
| ODI |
0 |
5 |
4 |
188 |
1932 |
322 |
40 |
0 |
| CDI |
0 |
0 |
0 |
0 |
613 |
2370 |
350 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
184 |
574 |
0 |
|
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 |
89809 |
2602 |
18 |
34 |
0 |
0 |
0 |
0 |
| OW |
0 |
429 |
100 |
156 |
9 |
0 |
0 |
0 |
| VODI |
0 |
112 |
75 |
463 |
68 |
1 |
0 |
0 |
| ODI |
0 |
3 |
5 |
141 |
2046 |
384 |
2 |
0 |
| CDI |
0 |
0 |
0 |
0 |
595 |
2808 |
262 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
114 |
180 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
89794 |
2379 |
11 |
22 |
0 |
0 |
0 |
0 |
| OW |
15 |
543 |
80 |
144 |
0 |
0 |
0 |
0 |
| VODI |
0 |
193 |
102 |
479 |
113 |
0 |
0 |
0 |
| ODI |
0 |
31 |
5 |
149 |
1863 |
314 |
36 |
0 |
| CDI |
0 |
0 |
0 |
0 |
724 |
2362 |
75 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
631 |
333 |
0 |
|
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