Validation of sea ice concentration - European sector
Bulletin date: 2025-09-18
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-12:
| 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 |
88695 |
2717 |
16 |
8 |
0 |
0 |
0 |
0 |
| OW |
2479 |
434 |
119 |
188 |
16 |
0 |
0 |
0 |
| VODI |
1305 |
39 |
66 |
444 |
255 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
75 |
476 |
394 |
2 |
0 |
| CDI |
0 |
0 |
0 |
2 |
199 |
1735 |
224 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
1022 |
1946 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-14:
| 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 |
88607 |
2724 |
23 |
9 |
0 |
0 |
0 |
0 |
| OW |
2424 |
387 |
113 |
168 |
28 |
0 |
0 |
0 |
| VODI |
1374 |
33 |
60 |
332 |
313 |
17 |
0 |
0 |
| ODI |
0 |
1 |
2 |
29 |
300 |
414 |
11 |
0 |
| CDI |
0 |
0 |
0 |
4 |
73 |
1901 |
178 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1178 |
2156 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-16:
| 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 |
88523 |
2904 |
31 |
12 |
0 |
0 |
0 |
0 |
| OW |
2343 |
223 |
123 |
92 |
16 |
0 |
0 |
0 |
| VODI |
1466 |
9 |
36 |
304 |
159 |
2 |
0 |
0 |
| ODI |
0 |
0 |
4 |
64 |
249 |
44 |
0 |
0 |
| CDI |
0 |
0 |
0 |
3 |
200 |
2094 |
116 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
35 |
1543 |
2215 |
51 |
|
...date precedes bulletin
|
Date: 2025-09-18:
| 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 |
87441 |
2837 |
978 |
16 |
0 |
0 |
0 |
0 |
| OW |
2316 |
229 |
60 |
104 |
53 |
8 |
0 |
0 |
| VODI |
1499 |
7 |
52 |
171 |
158 |
86 |
0 |
0 |
| ODI |
0 |
0 |
0 |
35 |
205 |
120 |
1 |
0 |
| CDI |
0 |
0 |
0 |
1 |
79 |
1168 |
432 |
0 |
| VCDI |
0 |
0 |
0 |
270 |
401 |
1543 |
2592 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87444 |
2813 |
980 |
29 |
0 |
0 |
0 |
0 |
| OW |
2318 |
246 |
54 |
95 |
56 |
10 |
0 |
0 |
| VODI |
1494 |
14 |
56 |
172 |
165 |
87 |
0 |
0 |
| ODI |
0 |
0 |
0 |
31 |
208 |
117 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
66 |
1257 |
440 |
0 |
| VCDI |
0 |
0 |
0 |
270 |
401 |
1454 |
2584 |
0 |
|
Date: 2025-09-20:
| 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 |
88106 |
2805 |
67 |
46 |
2 |
0 |
0 |
0 |
| OW |
2278 |
191 |
116 |
112 |
58 |
2 |
0 |
0 |
| VODI |
1541 |
3 |
17 |
191 |
257 |
23 |
0 |
0 |
| ODI |
0 |
0 |
0 |
5 |
246 |
123 |
2 |
0 |
| CDI |
0 |
0 |
0 |
11 |
97 |
1230 |
230 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
1861 |
2924 |
313 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88105 |
2800 |
71 |
53 |
5 |
0 |
0 |
0 |
| OW |
2286 |
195 |
103 |
111 |
59 |
3 |
0 |
0 |
| VODI |
1534 |
4 |
26 |
182 |
273 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
8 |
240 |
145 |
2 |
0 |
| CDI |
0 |
0 |
0 |
11 |
84 |
1203 |
255 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
1864 |
2899 |
313 |
|
Date: 2025-09-22:
| 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 |
86461 |
3715 |
963 |
16 |
0 |
0 |
0 |
0 |
| OW |
2196 |
270 |
119 |
87 |
2 |
0 |
0 |
0 |
| VODI |
1644 |
0 |
16 |
232 |
120 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
12 |
296 |
61 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
155 |
548 |
36 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
337 |
939 |
4530 |
93 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
86469 |
3603 |
979 |
35 |
6 |
0 |
0 |
0 |
| OW |
2235 |
298 |
45 |
84 |
42 |
5 |
0 |
0 |
| VODI |
1597 |
84 |
60 |
124 |
132 |
55 |
2 |
0 |
| ODI |
0 |
0 |
14 |
94 |
159 |
43 |
9 |
0 |
| CDI |
0 |
0 |
0 |
11 |
242 |
304 |
60 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
329 |
1144 |
4495 |
93 |
|
Date: 2025-09-24:
| 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 |
88024 |
3086 |
35 |
35 |
0 |
0 |
0 |
0 |
| OW |
2151 |
241 |
103 |
98 |
19 |
0 |
0 |
0 |
| VODI |
1696 |
4 |
16 |
193 |
146 |
27 |
0 |
0 |
| ODI |
0 |
0 |
0 |
33 |
158 |
121 |
2 |
0 |
| CDI |
0 |
0 |
0 |
1 |
202 |
404 |
97 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
570 |
4809 |
581 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88031 |
2899 |
54 |
64 |
10 |
0 |
0 |
0 |
| OW |
2193 |
293 |
30 |
69 |
88 |
19 |
0 |
0 |
| VODI |
1647 |
129 |
48 |
102 |
63 |
100 |
6 |
0 |
| ODI |
0 |
10 |
19 |
98 |
112 |
66 |
16 |
0 |
| CDI |
0 |
0 |
3 |
27 |
241 |
302 |
74 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
21 |
635 |
4812 |
581 |
|
Date: 2025-09-26:
| 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 |
88038 |
2965 |
30 |
22 |
0 |
0 |
0 |
0 |
| OW |
2030 |
303 |
79 |
88 |
33 |
0 |
0 |
0 |
| VODI |
1886 |
38 |
56 |
145 |
122 |
20 |
0 |
0 |
| ODI |
0 |
1 |
9 |
91 |
150 |
98 |
0 |
0 |
| CDI |
0 |
0 |
0 |
19 |
271 |
506 |
83 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1091 |
4406 |
264 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88159 |
2800 |
45 |
58 |
15 |
0 |
0 |
0 |
| OW |
2197 |
287 |
38 |
91 |
86 |
11 |
0 |
0 |
| VODI |
1598 |
169 |
43 |
63 |
92 |
76 |
0 |
0 |
| ODI |
0 |
50 |
42 |
94 |
85 |
66 |
0 |
0 |
| CDI |
0 |
1 |
6 |
59 |
277 |
296 |
3 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1266 |
4486 |
264 |
|
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