Validation of sea ice concentration - European sector
Bulletin date: 2025-09-11
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-09-05:
| 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 |
88716 |
2697 |
33 |
15 |
7 |
0 |
0 |
0 |
| OW |
2710 |
646 |
161 |
107 |
26 |
0 |
0 |
0 |
| VODI |
1026 |
48 |
81 |
424 |
112 |
1 |
0 |
0 |
| ODI |
0 |
0 |
4 |
233 |
1692 |
652 |
2 |
0 |
| CDI |
0 |
0 |
0 |
7 |
227 |
1354 |
183 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
510 |
1183 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-07:
| 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 |
88816 |
2797 |
16 |
5 |
4 |
0 |
0 |
0 |
| OW |
2681 |
551 |
120 |
144 |
21 |
0 |
0 |
0 |
| VODI |
1066 |
70 |
91 |
381 |
115 |
5 |
0 |
0 |
| ODI |
0 |
0 |
0 |
190 |
1543 |
441 |
5 |
0 |
| CDI |
0 |
0 |
0 |
1 |
426 |
1452 |
129 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
416 |
1362 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-09:
| 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 |
88857 |
2782 |
20 |
3 |
1 |
0 |
0 |
0 |
| OW |
2611 |
474 |
148 |
86 |
23 |
0 |
0 |
0 |
| VODI |
1148 |
19 |
55 |
486 |
163 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
101 |
935 |
233 |
4 |
0 |
| CDI |
0 |
0 |
0 |
0 |
542 |
2438 |
127 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
346 |
1255 |
0 |
|
...date precedes bulletin
|
Date: 2025-09-11:
| 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 |
88742 |
2745 |
10 |
7 |
0 |
0 |
0 |
0 |
| OW |
2517 |
485 |
118 |
133 |
23 |
0 |
0 |
0 |
| VODI |
1257 |
44 |
91 |
541 |
152 |
0 |
0 |
0 |
| ODI |
0 |
0 |
1 |
112 |
769 |
178 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
404 |
1772 |
124 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
22 |
992 |
1622 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88742 |
2707 |
15 |
8 |
0 |
0 |
0 |
0 |
| OW |
2520 |
519 |
109 |
130 |
25 |
0 |
0 |
0 |
| VODI |
1254 |
48 |
95 |
499 |
121 |
0 |
0 |
0 |
| ODI |
0 |
0 |
1 |
155 |
779 |
175 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
416 |
2061 |
214 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
29 |
706 |
1532 |
0 |
|
Date: 2025-09-13:
| 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 |
87102 |
4162 |
82 |
27 |
0 |
0 |
0 |
0 |
| OW |
2456 |
411 |
115 |
178 |
19 |
0 |
0 |
0 |
| VODI |
1339 |
47 |
63 |
402 |
260 |
4 |
0 |
0 |
| ODI |
0 |
0 |
2 |
67 |
419 |
358 |
2 |
0 |
| CDI |
0 |
0 |
0 |
2 |
230 |
1857 |
137 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
1116 |
2001 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87108 |
4146 |
81 |
32 |
0 |
0 |
0 |
0 |
| OW |
2459 |
413 |
112 |
171 |
18 |
0 |
0 |
0 |
| VODI |
1330 |
60 |
64 |
398 |
223 |
0 |
0 |
0 |
| ODI |
0 |
1 |
5 |
70 |
442 |
333 |
1 |
0 |
| CDI |
0 |
0 |
0 |
5 |
248 |
2098 |
212 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
904 |
1927 |
0 |
|
Date: 2025-09-15:
| 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 |
88568 |
2892 |
20 |
9 |
0 |
0 |
0 |
0 |
| OW |
2357 |
243 |
142 |
117 |
5 |
0 |
0 |
0 |
| VODI |
1443 |
2 |
25 |
327 |
130 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
47 |
334 |
11 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
296 |
2530 |
73 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
1126 |
2146 |
4 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88570 |
2783 |
34 |
28 |
0 |
0 |
0 |
0 |
| OW |
2406 |
323 |
95 |
175 |
47 |
0 |
0 |
0 |
| VODI |
1392 |
29 |
52 |
282 |
298 |
10 |
0 |
0 |
| ODI |
0 |
2 |
6 |
13 |
282 |
426 |
4 |
0 |
| CDI |
0 |
0 |
0 |
4 |
128 |
1880 |
135 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
1351 |
2080 |
4 |
|
Date: 2025-09-17:
| 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 |
88445 |
2906 |
43 |
10 |
0 |
0 |
0 |
0 |
| OW |
2332 |
193 |
91 |
137 |
36 |
0 |
0 |
0 |
| VODI |
1479 |
4 |
33 |
199 |
234 |
8 |
0 |
0 |
| ODI |
0 |
0 |
0 |
30 |
237 |
85 |
2 |
0 |
| CDI |
0 |
0 |
0 |
0 |
110 |
1890 |
201 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1267 |
2589 |
299 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
88509 |
2897 |
84 |
74 |
0 |
0 |
0 |
0 |
| OW |
2430 |
186 |
52 |
165 |
173 |
7 |
0 |
0 |
| VODI |
1317 |
16 |
26 |
124 |
290 |
76 |
1 |
0 |
| ODI |
0 |
4 |
4 |
10 |
113 |
372 |
59 |
0 |
| CDI |
0 |
0 |
1 |
3 |
42 |
1313 |
255 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1482 |
2477 |
299 |
|
Date: 2025-09-19:
| 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 |
87574 |
3437 |
87 |
53 |
0 |
0 |
0 |
0 |
| OW |
2299 |
191 |
81 |
109 |
69 |
9 |
0 |
0 |
| VODI |
1517 |
4 |
36 |
163 |
215 |
58 |
0 |
0 |
| ODI |
0 |
0 |
0 |
11 |
241 |
116 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
90 |
1053 |
416 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1937 |
2734 |
360 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
87635 |
3418 |
128 |
180 |
81 |
2 |
0 |
0 |
| OW |
2391 |
193 |
39 |
52 |
218 |
77 |
0 |
0 |
| VODI |
1364 |
20 |
32 |
80 |
207 |
103 |
4 |
0 |
| ODI |
0 |
1 |
5 |
23 |
83 |
250 |
39 |
0 |
| CDI |
0 |
0 |
0 |
2 |
26 |
740 |
451 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
2001 |
2656 |
360 |
|
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