Validation of sea ice concentration - European sector
Bulletin date: 2025-08-07
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-01:
| 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 |
85594 |
3643 |
33 |
87 |
0 |
0 |
0 |
0 |
| OW |
198 |
1069 |
201 |
396 |
0 |
0 |
0 |
0 |
| VODI |
36 |
151 |
144 |
1043 |
86 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
183 |
2114 |
169 |
0 |
0 |
| CDI |
0 |
0 |
0 |
7 |
956 |
2631 |
473 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
941 |
260 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-03:
| 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 |
85406 |
3743 |
32 |
50 |
0 |
0 |
0 |
0 |
| OW |
216 |
1350 |
151 |
298 |
2 |
0 |
0 |
0 |
| VODI |
32 |
335 |
180 |
923 |
41 |
1 |
0 |
0 |
| ODI |
0 |
6 |
2 |
209 |
2039 |
196 |
0 |
0 |
| CDI |
0 |
0 |
0 |
9 |
1175 |
2241 |
764 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
620 |
395 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-05:
| 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 |
86881 |
2900 |
33 |
36 |
0 |
0 |
0 |
0 |
| OW |
175 |
1756 |
186 |
450 |
8 |
0 |
0 |
0 |
| VODI |
0 |
48 |
71 |
672 |
155 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
75 |
2525 |
25 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
707 |
2716 |
458 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
22 |
517 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-07:
| 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 |
87101 |
2933 |
38 |
78 |
0 |
0 |
0 |
0 |
| OW |
250 |
1764 |
173 |
309 |
13 |
0 |
0 |
0 |
| VODI |
0 |
173 |
98 |
505 |
137 |
1 |
0 |
0 |
| ODI |
0 |
2 |
4 |
134 |
2153 |
43 |
2 |
0 |
| CDI |
0 |
0 |
0 |
0 |
847 |
2279 |
1066 |
5 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
47 |
261 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87101 |
3040 |
51 |
90 |
0 |
0 |
0 |
0 |
| OW |
250 |
1645 |
170 |
353 |
15 |
0 |
0 |
0 |
| VODI |
0 |
183 |
83 |
445 |
140 |
1 |
0 |
0 |
| ODI |
0 |
4 |
9 |
138 |
1992 |
76 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1002 |
2248 |
977 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
45 |
351 |
3 |
|
Date: 2025-08-09:
| 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 |
87647 |
2771 |
41 |
25 |
0 |
0 |
0 |
0 |
| OW |
208 |
1761 |
165 |
251 |
20 |
0 |
0 |
0 |
| VODI |
1 |
236 |
56 |
432 |
149 |
1 |
0 |
0 |
| ODI |
0 |
8 |
28 |
159 |
2067 |
17 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
1148 |
2872 |
146 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
182 |
20 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87627 |
2867 |
46 |
51 |
0 |
0 |
0 |
0 |
| OW |
229 |
1664 |
157 |
286 |
28 |
0 |
0 |
0 |
| VODI |
0 |
226 |
59 |
369 |
138 |
1 |
0 |
0 |
| ODI |
0 |
19 |
28 |
161 |
1970 |
31 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
1247 |
2822 |
144 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
218 |
22 |
0 |
|
Date: 2025-08-11:
| 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 |
88255 |
3195 |
53 |
32 |
0 |
0 |
0 |
0 |
| OW |
81 |
1330 |
168 |
301 |
6 |
0 |
0 |
0 |
| VODI |
0 |
4 |
12 |
424 |
160 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
4 |
3182 |
16 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
510 |
2456 |
26 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
79 |
121 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88180 |
2625 |
49 |
49 |
6 |
0 |
0 |
0 |
| OW |
156 |
1662 |
110 |
289 |
45 |
0 |
0 |
0 |
| VODI |
0 |
213 |
47 |
288 |
154 |
3 |
0 |
0 |
| ODI |
0 |
29 |
27 |
134 |
1847 |
57 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
1801 |
2465 |
75 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
27 |
72 |
0 |
|
Date: 2025-08-13:
| 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 |
88046 |
3674 |
71 |
50 |
0 |
0 |
0 |
0 |
| OW |
64 |
1218 |
142 |
301 |
21 |
1 |
0 |
0 |
| VODI |
0 |
3 |
9 |
352 |
194 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
9 |
2854 |
80 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
627 |
2402 |
113 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
139 |
44 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87980 |
3090 |
61 |
65 |
5 |
0 |
0 |
0 |
| OW |
130 |
1619 |
104 |
258 |
69 |
1 |
0 |
0 |
| VODI |
0 |
169 |
34 |
256 |
160 |
7 |
0 |
0 |
| ODI |
0 |
17 |
23 |
133 |
1531 |
124 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1930 |
2432 |
136 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
58 |
21 |
0 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88811 |
2209 |
45 |
107 |
22 |
0 |
0 |
0 |
| OW |
166 |
1644 |
107 |
167 |
85 |
0 |
0 |
0 |
| VODI |
0 |
207 |
37 |
195 |
208 |
3 |
0 |
0 |
| ODI |
0 |
80 |
37 |
204 |
1600 |
241 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
1716 |
2401 |
60 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
31 |
31 |
0 |
|
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