Validation of sea ice concentration - European sector
Bulletin date: 2025-04-17
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-11:
| 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 |
59560 |
13871 |
374 |
430 |
38 |
0 |
0 |
0 |
| OW |
19 |
572 |
261 |
761 |
298 |
11 |
0 |
0 |
| VODI |
11 |
136 |
78 |
622 |
690 |
77 |
0 |
0 |
| ODI |
10 |
14 |
25 |
294 |
877 |
390 |
3 |
0 |
| CDI |
5 |
0 |
2 |
122 |
1146 |
2074 |
423 |
0 |
| VCDI |
3 |
0 |
0 |
10 |
311 |
3336 |
8958 |
4604 |
|
...date precedes bulletin
|
Date: 2025-04-13:
| 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 |
58929 |
14339 |
369 |
428 |
64 |
0 |
0 |
0 |
| OW |
23 |
540 |
264 |
817 |
267 |
16 |
0 |
0 |
| VODI |
10 |
102 |
58 |
669 |
649 |
107 |
0 |
0 |
| ODI |
6 |
11 |
17 |
311 |
861 |
543 |
65 |
0 |
| CDI |
6 |
0 |
0 |
158 |
1130 |
2069 |
862 |
1 |
| VCDI |
2 |
0 |
0 |
4 |
301 |
2312 |
8098 |
6008 |
|
...date precedes bulletin
|
Date: 2025-04-15:
| 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 |
59246 |
14595 |
356 |
476 |
31 |
0 |
0 |
0 |
| OW |
9 |
398 |
272 |
758 |
223 |
2 |
0 |
0 |
| VODI |
8 |
43 |
18 |
756 |
707 |
85 |
0 |
0 |
| ODI |
3 |
5 |
1 |
221 |
1099 |
504 |
4 |
0 |
| CDI |
4 |
0 |
0 |
85 |
932 |
2670 |
888 |
0 |
| VCDI |
2 |
0 |
0 |
0 |
69 |
1268 |
8300 |
6378 |
|
...date precedes bulletin
|
Date: 2025-04-17:
| 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 |
59953 |
13955 |
385 |
430 |
26 |
0 |
0 |
0 |
| OW |
13 |
522 |
253 |
627 |
273 |
8 |
0 |
0 |
| VODI |
7 |
134 |
94 |
688 |
613 |
169 |
1 |
0 |
| ODI |
4 |
10 |
10 |
350 |
867 |
612 |
7 |
0 |
| CDI |
4 |
1 |
0 |
56 |
824 |
2195 |
1151 |
31 |
| VCDI |
1 |
1 |
1 |
2 |
89 |
1603 |
7975 |
6471 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59954 |
13937 |
376 |
437 |
28 |
0 |
0 |
0 |
| OW |
11 |
540 |
264 |
600 |
265 |
6 |
0 |
0 |
| VODI |
8 |
134 |
91 |
716 |
626 |
175 |
1 |
0 |
| ODI |
4 |
10 |
11 |
353 |
887 |
649 |
13 |
0 |
| CDI |
4 |
2 |
1 |
47 |
802 |
2181 |
1472 |
36 |
| VCDI |
1 |
0 |
0 |
0 |
84 |
1576 |
7648 |
6466 |
|
Date: 2025-04-19:
| 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 |
59172 |
14364 |
431 |
505 |
45 |
0 |
0 |
0 |
| OW |
13 |
659 |
188 |
616 |
322 |
9 |
0 |
0 |
| VODI |
7 |
241 |
114 |
785 |
634 |
252 |
0 |
0 |
| ODI |
3 |
11 |
26 |
323 |
862 |
593 |
45 |
0 |
| CDI |
3 |
4 |
1 |
108 |
997 |
1986 |
1413 |
0 |
| VCDI |
1 |
0 |
0 |
0 |
95 |
1282 |
7517 |
6789 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59170 |
14361 |
415 |
531 |
39 |
0 |
0 |
0 |
| OW |
15 |
654 |
197 |
602 |
331 |
15 |
0 |
0 |
| VODI |
6 |
250 |
121 |
761 |
657 |
244 |
3 |
0 |
| ODI |
3 |
12 |
26 |
342 |
912 |
650 |
42 |
0 |
| CDI |
4 |
2 |
1 |
101 |
917 |
2044 |
1643 |
0 |
| VCDI |
1 |
0 |
0 |
0 |
99 |
1169 |
7287 |
6789 |
|
Date: 2025-04-21:
| 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 |
59229 |
14580 |
405 |
602 |
85 |
0 |
0 |
0 |
| OW |
14 |
668 |
334 |
678 |
263 |
16 |
0 |
0 |
| VODI |
6 |
33 |
24 |
887 |
963 |
126 |
0 |
0 |
| ODI |
2 |
3 |
0 |
119 |
1093 |
452 |
2 |
0 |
| CDI |
5 |
0 |
0 |
3 |
477 |
2069 |
398 |
8 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1031 |
8871 |
6952 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59216 |
14331 |
365 |
564 |
80 |
0 |
0 |
0 |
| OW |
21 |
702 |
246 |
604 |
355 |
30 |
0 |
0 |
| VODI |
8 |
228 |
151 |
761 |
739 |
319 |
1 |
0 |
| ODI |
6 |
15 |
1 |
317 |
878 |
583 |
59 |
1 |
| CDI |
5 |
8 |
0 |
43 |
802 |
1673 |
1625 |
36 |
| VCDI |
0 |
0 |
0 |
0 |
45 |
1089 |
7586 |
6923 |
|
Date: 2025-04-23:
| 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 |
59433 |
14250 |
437 |
702 |
91 |
0 |
0 |
0 |
| OW |
16 |
650 |
285 |
725 |
263 |
15 |
0 |
0 |
| VODI |
9 |
31 |
62 |
760 |
866 |
131 |
0 |
0 |
| ODI |
2 |
5 |
0 |
131 |
887 |
553 |
11 |
0 |
| CDI |
3 |
0 |
0 |
10 |
456 |
2132 |
1856 |
77 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
543 |
8066 |
6957 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59420 |
13950 |
389 |
714 |
67 |
0 |
0 |
0 |
| OW |
24 |
794 |
241 |
567 |
365 |
19 |
0 |
0 |
| VODI |
11 |
171 |
152 |
746 |
694 |
315 |
2 |
0 |
| ODI |
3 |
15 |
2 |
280 |
792 |
601 |
127 |
0 |
| CDI |
5 |
6 |
0 |
21 |
630 |
1858 |
3034 |
126 |
| VCDI |
0 |
0 |
0 |
0 |
16 |
581 |
6770 |
6908 |
|
Date: 2025-04-25:
| 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 |
60026 |
13695 |
363 |
515 |
19 |
0 |
0 |
0 |
| OW |
19 |
835 |
316 |
779 |
255 |
1 |
0 |
0 |
| VODI |
6 |
48 |
86 |
908 |
860 |
102 |
4 |
0 |
| ODI |
3 |
3 |
0 |
170 |
951 |
568 |
50 |
0 |
| CDI |
2 |
0 |
0 |
4 |
576 |
2663 |
1705 |
25 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1084 |
7042 |
6730 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60025 |
13369 |
355 |
614 |
118 |
1 |
0 |
0 |
| OW |
18 |
956 |
257 |
576 |
290 |
67 |
0 |
0 |
| VODI |
7 |
230 |
122 |
777 |
674 |
311 |
29 |
0 |
| ODI |
2 |
21 |
31 |
293 |
711 |
535 |
188 |
0 |
| CDI |
4 |
5 |
0 |
116 |
861 |
2503 |
2585 |
5 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
1001 |
5999 |
6750 |
|
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