Validation of sea ice concentration - European sector
Bulletin date: 2025-05-22
Data source: OSI SAF N.H. multi-product 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 |
63086 |
11406 |
74 |
85 |
8 |
0 |
0 |
0 |
| OW |
29 |
1754 |
381 |
477 |
94 |
2 |
0 |
0 |
| VODI |
0 |
240 |
336 |
2631 |
612 |
25 |
0 |
0 |
| ODI |
0 |
16 |
14 |
871 |
2456 |
347 |
4 |
0 |
| CDI |
0 |
3 |
2 |
91 |
1793 |
3800 |
1323 |
42 |
| VCDI |
0 |
0 |
0 |
3 |
25 |
1275 |
6519 |
592 |
|
...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 |
63180 |
11232 |
94 |
106 |
6 |
0 |
0 |
0 |
| OW |
32 |
1877 |
293 |
670 |
49 |
0 |
0 |
0 |
| VODI |
0 |
427 |
405 |
2589 |
565 |
18 |
0 |
0 |
| ODI |
0 |
32 |
21 |
719 |
2508 |
303 |
11 |
0 |
| CDI |
0 |
3 |
7 |
122 |
2204 |
3196 |
909 |
256 |
| VCDI |
0 |
0 |
0 |
0 |
36 |
1091 |
5665 |
1790 |
|
...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 |
63276 |
12060 |
112 |
155 |
1 |
0 |
0 |
0 |
| OW |
0 |
1449 |
609 |
907 |
79 |
0 |
0 |
0 |
| VODI |
0 |
57 |
88 |
2753 |
755 |
3 |
0 |
0 |
| ODI |
0 |
1 |
2 |
203 |
3194 |
389 |
8 |
0 |
| CDI |
0 |
0 |
0 |
12 |
1048 |
3824 |
710 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
980 |
5200 |
2523 |
|
...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 |
63303 |
11988 |
94 |
209 |
6 |
0 |
0 |
0 |
| OW |
1 |
1528 |
577 |
1163 |
52 |
0 |
0 |
0 |
| VODI |
0 |
72 |
103 |
2551 |
696 |
18 |
0 |
0 |
| ODI |
0 |
1 |
0 |
247 |
3131 |
309 |
2 |
0 |
| CDI |
0 |
0 |
0 |
50 |
1427 |
4083 |
684 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
5 |
960 |
5355 |
1795 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63302 |
11981 |
94 |
226 |
5 |
0 |
0 |
0 |
| OW |
2 |
1537 |
565 |
1065 |
49 |
0 |
0 |
0 |
| VODI |
0 |
70 |
115 |
2642 |
770 |
20 |
0 |
0 |
| ODI |
0 |
1 |
0 |
242 |
3106 |
328 |
3 |
0 |
| CDI |
0 |
0 |
0 |
46 |
1384 |
4037 |
647 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
3 |
985 |
5391 |
1795 |
|
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 |
64306 |
11144 |
78 |
56 |
1 |
0 |
0 |
0 |
| OW |
2 |
2024 |
599 |
1012 |
45 |
1 |
0 |
0 |
| VODI |
0 |
121 |
231 |
2192 |
778 |
16 |
0 |
0 |
| ODI |
0 |
0 |
4 |
378 |
2915 |
280 |
9 |
0 |
| CDI |
0 |
0 |
0 |
61 |
1697 |
3520 |
547 |
2 |
| VCDI |
0 |
0 |
0 |
15 |
55 |
1228 |
3222 |
3877 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64304 |
11107 |
87 |
65 |
1 |
0 |
0 |
0 |
| OW |
4 |
2060 |
594 |
980 |
40 |
0 |
0 |
0 |
| VODI |
0 |
122 |
229 |
2243 |
847 |
15 |
0 |
0 |
| ODI |
0 |
0 |
2 |
350 |
2895 |
304 |
9 |
0 |
| CDI |
0 |
0 |
0 |
62 |
1689 |
3549 |
587 |
3 |
| VCDI |
0 |
0 |
0 |
14 |
19 |
1177 |
3182 |
3876 |
|
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 |
66402 |
10779 |
80 |
19 |
0 |
0 |
0 |
0 |
| OW |
0 |
1333 |
701 |
709 |
16 |
0 |
0 |
0 |
| VODI |
0 |
28 |
43 |
2447 |
422 |
3 |
0 |
0 |
| ODI |
0 |
0 |
1 |
222 |
3373 |
115 |
1 |
0 |
| CDI |
0 |
0 |
0 |
18 |
920 |
3988 |
227 |
1 |
| VCDI |
0 |
0 |
0 |
12 |
8 |
634 |
5852 |
2062 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66354 |
9609 |
70 |
31 |
0 |
0 |
0 |
0 |
| OW |
48 |
2353 |
480 |
737 |
23 |
0 |
0 |
0 |
| VODI |
0 |
175 |
255 |
2074 |
770 |
34 |
0 |
0 |
| ODI |
0 |
2 |
19 |
446 |
2477 |
540 |
21 |
0 |
| CDI |
0 |
1 |
1 |
119 |
1414 |
2944 |
1173 |
6 |
| VCDI |
0 |
0 |
0 |
20 |
55 |
1222 |
4886 |
2057 |
|
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 |
66400 |
11085 |
82 |
51 |
1 |
0 |
0 |
0 |
| OW |
0 |
1296 |
622 |
827 |
62 |
5 |
0 |
0 |
| VODI |
0 |
38 |
104 |
2112 |
637 |
26 |
0 |
0 |
| ODI |
0 |
0 |
1 |
397 |
2733 |
242 |
0 |
0 |
| CDI |
0 |
0 |
0 |
14 |
1111 |
3665 |
694 |
1 |
| VCDI |
0 |
0 |
0 |
9 |
25 |
679 |
5170 |
2327 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66400 |
9911 |
70 |
58 |
1 |
0 |
0 |
0 |
| OW |
0 |
2273 |
458 |
978 |
83 |
4 |
0 |
0 |
| VODI |
0 |
231 |
255 |
1661 |
964 |
66 |
0 |
0 |
| ODI |
0 |
4 |
26 |
597 |
2095 |
543 |
6 |
0 |
| CDI |
0 |
0 |
0 |
107 |
1331 |
3117 |
1288 |
1 |
| VCDI |
0 |
0 |
0 |
9 |
95 |
887 |
4570 |
2327 |
|
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 |
66904 |
10766 |
83 |
47 |
0 |
0 |
0 |
0 |
| OW |
41 |
1476 |
594 |
740 |
71 |
1 |
0 |
0 |
| VODI |
0 |
54 |
166 |
2057 |
654 |
14 |
0 |
0 |
| ODI |
0 |
4 |
4 |
382 |
2442 |
250 |
0 |
0 |
| CDI |
0 |
0 |
1 |
79 |
1437 |
2781 |
1694 |
62 |
| VCDI |
0 |
0 |
0 |
5 |
11 |
643 |
4156 |
2797 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66871 |
9581 |
86 |
58 |
0 |
0 |
0 |
0 |
| OW |
74 |
2205 |
428 |
962 |
101 |
8 |
0 |
0 |
| VODI |
0 |
435 |
223 |
1463 |
982 |
85 |
0 |
0 |
| ODI |
0 |
75 |
88 |
554 |
1982 |
487 |
26 |
0 |
| CDI |
0 |
4 |
23 |
262 |
1541 |
2936 |
2581 |
312 |
| VCDI |
0 |
0 |
0 |
11 |
9 |
173 |
3243 |
2547 |
|
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