Validation of sea ice concentration - European sector
Bulletin date: 2025-04-24
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-18:
| 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 |
59875 |
13901 |
386 |
447 |
33 |
0 |
0 |
0 |
| OW |
17 |
599 |
223 |
593 |
297 |
10 |
0 |
0 |
| VODI |
7 |
215 |
94 |
747 |
591 |
199 |
0 |
0 |
| ODI |
4 |
14 |
20 |
342 |
835 |
631 |
27 |
0 |
| CDI |
4 |
13 |
0 |
81 |
889 |
2086 |
1476 |
19 |
| VCDI |
1 |
0 |
0 |
0 |
143 |
1314 |
7514 |
6769 |
|
...date precedes bulletin
|
Date: 2025-04-20:
| 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 |
59190 |
14327 |
383 |
518 |
70 |
0 |
0 |
0 |
| OW |
11 |
635 |
195 |
699 |
323 |
13 |
0 |
0 |
| VODI |
8 |
223 |
145 |
760 |
736 |
263 |
0 |
0 |
| ODI |
4 |
18 |
16 |
347 |
858 |
611 |
23 |
1 |
| CDI |
5 |
4 |
2 |
69 |
990 |
1737 |
1448 |
16 |
| VCDI |
0 |
0 |
0 |
0 |
67 |
1255 |
7854 |
6592 |
|
...date precedes bulletin
|
Date: 2025-04-22:
| 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 |
59643 |
14210 |
409 |
633 |
99 |
0 |
0 |
0 |
| OW |
12 |
634 |
304 |
664 |
295 |
10 |
0 |
0 |
| VODI |
9 |
34 |
48 |
790 |
927 |
129 |
0 |
0 |
| ODI |
3 |
4 |
0 |
119 |
925 |
494 |
3 |
0 |
| CDI |
5 |
0 |
0 |
10 |
424 |
2126 |
938 |
27 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
841 |
8859 |
6788 |
|
...date precedes bulletin
|
Date: 2025-04-24:
| 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 |
59681 |
13921 |
346 |
715 |
64 |
0 |
0 |
0 |
| OW |
20 |
694 |
275 |
800 |
245 |
9 |
0 |
0 |
| VODI |
6 |
33 |
89 |
777 |
889 |
113 |
0 |
0 |
| ODI |
3 |
4 |
0 |
158 |
935 |
606 |
9 |
0 |
| CDI |
3 |
0 |
0 |
12 |
468 |
2417 |
2152 |
100 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
634 |
7443 |
6795 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59679 |
13922 |
358 |
714 |
56 |
0 |
0 |
0 |
| OW |
21 |
676 |
252 |
808 |
249 |
4 |
0 |
0 |
| VODI |
7 |
50 |
100 |
754 |
903 |
115 |
0 |
0 |
| ODI |
2 |
4 |
0 |
176 |
945 |
673 |
27 |
0 |
| CDI |
4 |
0 |
0 |
10 |
448 |
2374 |
2225 |
168 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
613 |
7352 |
6727 |
|
Date: 2025-04-26:
| 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 |
59805 |
13934 |
332 |
431 |
38 |
0 |
0 |
0 |
| OW |
16 |
820 |
258 |
857 |
328 |
14 |
0 |
0 |
| VODI |
7 |
82 |
96 |
843 |
781 |
228 |
2 |
0 |
| ODI |
3 |
4 |
0 |
185 |
910 |
635 |
81 |
0 |
| CDI |
2 |
0 |
0 |
14 |
671 |
2437 |
1823 |
20 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
1206 |
7211 |
6336 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59797 |
13957 |
341 |
467 |
43 |
0 |
0 |
0 |
| OW |
23 |
780 |
239 |
816 |
317 |
13 |
0 |
0 |
| VODI |
6 |
98 |
104 |
820 |
826 |
226 |
3 |
0 |
| ODI |
3 |
5 |
2 |
207 |
900 |
690 |
106 |
0 |
| CDI |
4 |
0 |
0 |
20 |
641 |
2377 |
1916 |
64 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
1214 |
7092 |
6292 |
|
Date: 2025-04-28:
| 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 |
61091 |
13253 |
314 |
262 |
22 |
0 |
0 |
0 |
| OW |
53 |
614 |
452 |
705 |
105 |
6 |
0 |
0 |
| VODI |
10 |
26 |
15 |
1314 |
536 |
38 |
0 |
0 |
| ODI |
2 |
0 |
0 |
116 |
1550 |
185 |
4 |
0 |
| CDI |
0 |
0 |
0 |
0 |
490 |
3080 |
256 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1524 |
8271 |
6120 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61080 |
12875 |
310 |
348 |
52 |
7 |
0 |
0 |
| OW |
55 |
887 |
299 |
841 |
238 |
30 |
4 |
0 |
| VODI |
15 |
131 |
162 |
857 |
850 |
160 |
15 |
0 |
| ODI |
4 |
0 |
10 |
289 |
913 |
692 |
52 |
0 |
| CDI |
2 |
0 |
0 |
62 |
611 |
2287 |
1748 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
40 |
1657 |
6712 |
6120 |
|
Date: 2025-04-30:
| 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 |
60625 |
13428 |
319 |
259 |
7 |
0 |
0 |
0 |
| OW |
8 |
738 |
368 |
917 |
143 |
1 |
0 |
0 |
| VODI |
5 |
51 |
58 |
1171 |
687 |
31 |
0 |
0 |
| ODI |
2 |
0 |
1 |
219 |
1297 |
225 |
1 |
0 |
| CDI |
0 |
0 |
0 |
13 |
831 |
3338 |
1069 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
36 |
1351 |
7491 |
5726 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60618 |
13086 |
367 |
457 |
65 |
0 |
0 |
0 |
| OW |
15 |
959 |
259 |
959 |
407 |
24 |
0 |
0 |
| VODI |
4 |
161 |
94 |
794 |
870 |
201 |
3 |
0 |
| ODI |
3 |
11 |
26 |
285 |
915 |
679 |
93 |
1 |
| CDI |
0 |
0 |
0 |
83 |
676 |
2630 |
2368 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
68 |
1412 |
6097 |
5725 |
|
Date: 2025-05-02:
| 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 |
60827 |
13185 |
209 |
179 |
3 |
0 |
0 |
0 |
| OW |
10 |
787 |
435 |
880 |
103 |
0 |
0 |
0 |
| VODI |
2 |
61 |
80 |
1175 |
687 |
40 |
6 |
0 |
| ODI |
1 |
2 |
4 |
285 |
1386 |
385 |
49 |
0 |
| CDI |
0 |
0 |
0 |
18 |
966 |
4135 |
1634 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1270 |
6495 |
5097 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60825 |
12885 |
370 |
481 |
71 |
1 |
0 |
0 |
| OW |
10 |
1004 |
288 |
1031 |
405 |
22 |
0 |
0 |
| VODI |
3 |
138 |
42 |
744 |
992 |
211 |
38 |
0 |
| ODI |
1 |
8 |
28 |
219 |
1020 |
721 |
80 |
1 |
| CDI |
1 |
0 |
0 |
62 |
636 |
3422 |
1818 |
21 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1453 |
6248 |
5077 |
|
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