Validation of sea ice concentration - European sector
Bulletin date: 2025-05-22
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-16:
| 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 |
61859 |
11143 |
43 |
34 |
8 |
2 |
0 |
0 |
| OW |
895 |
2027 |
312 |
247 |
79 |
8 |
9 |
0 |
| VODI |
2218 |
581 |
486 |
1813 |
814 |
63 |
22 |
0 |
| ODI |
1269 |
46 |
55 |
799 |
1939 |
742 |
57 |
0 |
| CDI |
0 |
17 |
22 |
169 |
1382 |
3811 |
1565 |
0 |
| VCDI |
0 |
0 |
1 |
8 |
47 |
1558 |
6666 |
46 |
|
...date precedes bulletin
|
Date: 2025-05-18:
| 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 |
61093 |
11791 |
46 |
36 |
20 |
0 |
0 |
0 |
| OW |
829 |
2119 |
316 |
318 |
115 |
8 |
2 |
0 |
| VODI |
2136 |
668 |
524 |
1896 |
761 |
69 |
15 |
0 |
| ODI |
1471 |
58 |
65 |
741 |
1886 |
692 |
75 |
0 |
| CDI |
0 |
19 |
19 |
186 |
1627 |
3394 |
1239 |
132 |
| VCDI |
0 |
0 |
0 |
13 |
30 |
1180 |
6869 |
404 |
|
...date precedes bulletin
|
Date: 2025-05-20:
| 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 |
61132 |
12618 |
98 |
86 |
25 |
0 |
0 |
0 |
| OW |
833 |
1758 |
542 |
576 |
107 |
15 |
0 |
0 |
| VODI |
2201 |
250 |
345 |
1992 |
931 |
65 |
18 |
0 |
| ODI |
1400 |
21 |
37 |
416 |
2261 |
920 |
54 |
0 |
| CDI |
0 |
0 |
5 |
75 |
895 |
3570 |
976 |
0 |
| VCDI |
0 |
0 |
1 |
12 |
13 |
1374 |
6966 |
274 |
|
...date precedes bulletin
|
Date: 2025-05-22:
| 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 |
61187 |
12540 |
113 |
92 |
17 |
1 |
0 |
0 |
| OW |
841 |
1911 |
548 |
701 |
117 |
5 |
0 |
0 |
| VODI |
2245 |
240 |
356 |
1909 |
780 |
79 |
10 |
0 |
| ODI |
1347 |
32 |
47 |
456 |
2244 |
793 |
35 |
0 |
| CDI |
0 |
3 |
5 |
117 |
1186 |
3966 |
890 |
0 |
| VCDI |
0 |
2 |
4 |
3 |
13 |
1362 |
6155 |
510 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61187 |
12538 |
118 |
99 |
14 |
1 |
0 |
0 |
| OW |
841 |
1905 |
536 |
618 |
117 |
2 |
0 |
0 |
| VODI |
2245 |
252 |
360 |
1994 |
831 |
96 |
8 |
0 |
| ODI |
1347 |
29 |
49 |
453 |
2241 |
801 |
33 |
0 |
| CDI |
0 |
2 |
7 |
113 |
1139 |
3910 |
868 |
0 |
| VCDI |
0 |
2 |
3 |
1 |
15 |
1396 |
6181 |
510 |
|
Date: 2025-05-24:
| 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 |
61790 |
11991 |
92 |
60 |
0 |
0 |
0 |
0 |
| OW |
849 |
2315 |
612 |
633 |
72 |
11 |
2 |
0 |
| VODI |
2296 |
334 |
398 |
1568 |
787 |
160 |
20 |
0 |
| ODI |
1287 |
34 |
53 |
569 |
2117 |
670 |
70 |
0 |
| CDI |
0 |
4 |
8 |
111 |
1365 |
3483 |
786 |
0 |
| VCDI |
0 |
2 |
8 |
23 |
36 |
1394 |
5471 |
1381 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61790 |
11972 |
87 |
61 |
0 |
0 |
0 |
0 |
| OW |
849 |
2353 |
614 |
596 |
69 |
7 |
1 |
0 |
| VODI |
2295 |
319 |
403 |
1625 |
865 |
150 |
21 |
0 |
| ODI |
1288 |
31 |
52 |
545 |
2091 |
707 |
69 |
0 |
| CDI |
0 |
3 |
8 |
124 |
1334 |
3493 |
845 |
0 |
| VCDI |
0 |
2 |
7 |
13 |
18 |
1361 |
5413 |
1381 |
|
Date: 2025-05-26:
| 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 |
62848 |
12620 |
130 |
28 |
0 |
0 |
0 |
0 |
| OW |
852 |
1510 |
569 |
580 |
59 |
6 |
4 |
0 |
| VODI |
2345 |
208 |
290 |
1591 |
646 |
127 |
14 |
0 |
| ODI |
1232 |
19 |
20 |
438 |
2363 |
773 |
27 |
0 |
| CDI |
0 |
1 |
7 |
92 |
676 |
3651 |
663 |
0 |
| VCDI |
0 |
4 |
5 |
1 |
4 |
1128 |
6577 |
754 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
62823 |
11471 |
102 |
18 |
0 |
0 |
0 |
0 |
| OW |
878 |
2445 |
506 |
555 |
67 |
9 |
5 |
0 |
| VODI |
2357 |
373 |
347 |
1447 |
777 |
256 |
17 |
0 |
| ODI |
1219 |
59 |
40 |
541 |
1828 |
839 |
133 |
0 |
| CDI |
0 |
9 |
17 |
149 |
1033 |
2993 |
1385 |
0 |
| VCDI |
0 |
5 |
9 |
20 |
43 |
1588 |
5745 |
754 |
|
Date: 2025-05-28:
| 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 |
64698 |
11206 |
42 |
20 |
0 |
0 |
0 |
0 |
| OW |
863 |
1665 |
469 |
553 |
77 |
15 |
0 |
0 |
| VODI |
2405 |
257 |
301 |
1543 |
603 |
128 |
5 |
0 |
| ODI |
1160 |
8 |
20 |
585 |
1898 |
771 |
28 |
0 |
| CDI |
0 |
3 |
3 |
67 |
980 |
3448 |
926 |
0 |
| VCDI |
0 |
2 |
5 |
10 |
9 |
1063 |
6146 |
880 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64698 |
9993 |
54 |
41 |
5 |
0 |
0 |
0 |
| OW |
867 |
2549 |
415 |
688 |
91 |
13 |
1 |
0 |
| VODI |
2418 |
498 |
287 |
1270 |
772 |
253 |
9 |
0 |
| ODI |
1143 |
79 |
60 |
610 |
1540 |
837 |
86 |
0 |
| CDI |
0 |
20 |
18 |
137 |
1104 |
3128 |
1375 |
0 |
| VCDI |
0 |
2 |
6 |
32 |
55 |
1194 |
5634 |
880 |
|
Date: 2025-05-30:
| 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 |
64928 |
11159 |
44 |
16 |
2 |
0 |
0 |
0 |
| OW |
881 |
1736 |
474 |
556 |
104 |
8 |
1 |
0 |
| VODI |
2469 |
369 |
321 |
1362 |
692 |
117 |
2 |
0 |
| ODI |
1082 |
34 |
41 |
545 |
1701 |
638 |
54 |
0 |
| CDI |
0 |
8 |
18 |
135 |
1035 |
2777 |
2026 |
0 |
| VCDI |
0 |
4 |
2 |
1 |
10 |
966 |
5817 |
727 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64914 |
9967 |
45 |
22 |
3 |
0 |
0 |
0 |
| OW |
900 |
2402 |
460 |
717 |
133 |
14 |
0 |
0 |
| VODI |
2488 |
632 |
268 |
1053 |
883 |
227 |
17 |
0 |
| ODI |
1058 |
228 |
66 |
568 |
1423 |
773 |
90 |
0 |
| CDI |
0 |
76 |
57 |
250 |
1098 |
2981 |
3060 |
56 |
| VCDI |
0 |
5 |
4 |
5 |
4 |
511 |
4733 |
671 |
|
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