Validation of sea ice concentration - European sector
Bulletin date: 2025-05-29
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-23:
| 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 |
61533 |
12201 |
104 |
62 |
7 |
0 |
0 |
0 |
| OW |
846 |
2103 |
625 |
704 |
104 |
3 |
0 |
0 |
| VODI |
2271 |
282 |
316 |
1744 |
828 |
125 |
17 |
0 |
| ODI |
1316 |
26 |
45 |
502 |
2182 |
731 |
59 |
0 |
| CDI |
0 |
1 |
7 |
96 |
1192 |
3846 |
721 |
0 |
| VCDI |
0 |
3 |
9 |
20 |
44 |
1514 |
6230 |
443 |
|
...date precedes bulletin
|
Date: 2025-05-25:
| 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 |
60166 |
13810 |
90 |
115 |
1 |
0 |
0 |
0 |
| OW |
850 |
2315 |
569 |
641 |
76 |
7 |
3 |
0 |
| VODI |
2325 |
291 |
363 |
1553 |
763 |
146 |
36 |
0 |
| ODI |
1255 |
26 |
52 |
590 |
2063 |
734 |
55 |
0 |
| CDI |
0 |
5 |
10 |
106 |
1185 |
3374 |
776 |
3 |
| VCDI |
0 |
6 |
9 |
30 |
44 |
1507 |
5931 |
981 |
|
...date precedes bulletin
|
Date: 2025-05-27:
| 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 |
62419 |
13268 |
102 |
33 |
0 |
0 |
0 |
0 |
| OW |
852 |
1624 |
481 |
575 |
64 |
14 |
1 |
0 |
| VODI |
2379 |
257 |
311 |
1506 |
654 |
119 |
9 |
0 |
| ODI |
1197 |
23 |
23 |
505 |
2187 |
710 |
17 |
0 |
| CDI |
0 |
4 |
2 |
64 |
900 |
3421 |
733 |
0 |
| VCDI |
0 |
3 |
6 |
10 |
4 |
1054 |
6604 |
727 |
|
...date precedes bulletin
|
Date: 2025-05-29:
| 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 |
64739 |
11260 |
52 |
15 |
2 |
0 |
0 |
0 |
| OW |
869 |
1687 |
480 |
558 |
88 |
12 |
2 |
0 |
| VODI |
2433 |
261 |
286 |
1489 |
657 |
98 |
19 |
0 |
| ODI |
1125 |
17 |
28 |
561 |
1806 |
712 |
42 |
0 |
| CDI |
0 |
7 |
9 |
99 |
1082 |
2864 |
1682 |
0 |
| VCDI |
0 |
2 |
6 |
4 |
6 |
962 |
6068 |
773 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64739 |
11268 |
57 |
15 |
3 |
0 |
0 |
0 |
| OW |
869 |
1674 |
461 |
549 |
87 |
12 |
3 |
0 |
| VODI |
2433 |
269 |
300 |
1516 |
683 |
121 |
18 |
0 |
| ODI |
1125 |
16 |
30 |
553 |
1742 |
708 |
63 |
0 |
| CDI |
0 |
4 |
4 |
83 |
1105 |
2726 |
1752 |
7 |
| VCDI |
0 |
3 |
9 |
10 |
21 |
1081 |
5977 |
766 |
|
Date: 2025-05-31:
| 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 |
64995 |
11095 |
57 |
38 |
9 |
0 |
0 |
0 |
| OW |
898 |
1800 |
499 |
603 |
116 |
7 |
0 |
0 |
| VODI |
2515 |
369 |
328 |
1414 |
720 |
79 |
0 |
0 |
| ODI |
1031 |
42 |
58 |
579 |
1597 |
486 |
41 |
0 |
| CDI |
0 |
12 |
18 |
159 |
1245 |
2739 |
1791 |
1 |
| VCDI |
0 |
2 |
1 |
1 |
8 |
1083 |
5803 |
623 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64995 |
11087 |
60 |
44 |
11 |
0 |
0 |
0 |
| OW |
898 |
1787 |
484 |
587 |
120 |
11 |
0 |
0 |
| VODI |
2515 |
396 |
339 |
1436 |
739 |
88 |
0 |
0 |
| ODI |
1031 |
43 |
62 |
566 |
1551 |
521 |
43 |
0 |
| CDI |
0 |
3 |
9 |
149 |
1236 |
2581 |
1758 |
0 |
| VCDI |
0 |
4 |
7 |
12 |
38 |
1193 |
5834 |
624 |
|
Date: 2025-06-02:
| 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 |
64426 |
12309 |
123 |
48 |
1 |
0 |
0 |
0 |
| OW |
887 |
1467 |
665 |
625 |
48 |
3 |
0 |
0 |
| VODI |
2693 |
150 |
263 |
1748 |
787 |
39 |
0 |
0 |
| ODI |
843 |
0 |
18 |
313 |
2321 |
552 |
9 |
0 |
| CDI |
0 |
4 |
10 |
50 |
966 |
3782 |
933 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1016 |
5399 |
363 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64426 |
11410 |
62 |
30 |
2 |
0 |
0 |
0 |
| OW |
886 |
1989 |
581 |
702 |
135 |
14 |
0 |
0 |
| VODI |
2626 |
467 |
357 |
1344 |
848 |
79 |
1 |
0 |
| ODI |
911 |
59 |
62 |
565 |
1583 |
517 |
51 |
0 |
| CDI |
0 |
1 |
7 |
119 |
1514 |
2776 |
1469 |
0 |
| VCDI |
0 |
4 |
10 |
24 |
42 |
2006 |
4820 |
363 |
|
Date: 2025-06-04:
| 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 |
65476 |
11809 |
70 |
20 |
0 |
0 |
0 |
0 |
| OW |
895 |
1743 |
502 |
600 |
68 |
7 |
1 |
0 |
| VODI |
2868 |
223 |
325 |
1507 |
725 |
72 |
1 |
0 |
| ODI |
656 |
7 |
18 |
347 |
1998 |
396 |
14 |
0 |
| CDI |
0 |
10 |
13 |
76 |
1132 |
4293 |
1428 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
760 |
4364 |
438 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65473 |
10802 |
44 |
28 |
0 |
0 |
0 |
0 |
| OW |
894 |
2221 |
471 |
725 |
150 |
35 |
1 |
0 |
| VODI |
2769 |
663 |
306 |
1011 |
768 |
89 |
2 |
0 |
| ODI |
759 |
85 |
71 |
587 |
1440 |
348 |
19 |
0 |
| CDI |
0 |
11 |
23 |
175 |
1459 |
3587 |
2008 |
28 |
| VCDI |
0 |
10 |
13 |
24 |
106 |
1469 |
3778 |
410 |
|
Date: 2025-06-06:
| 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 |
66843 |
10879 |
28 |
5 |
1 |
0 |
0 |
0 |
| OW |
907 |
2067 |
446 |
432 |
79 |
12 |
0 |
0 |
| VODI |
3511 |
368 |
305 |
1301 |
759 |
59 |
1 |
0 |
| ODI |
0 |
13 |
39 |
415 |
1834 |
527 |
24 |
0 |
| CDI |
0 |
0 |
0 |
50 |
917 |
3807 |
1778 |
0 |
| VCDI |
0 |
10 |
10 |
14 |
31 |
763 |
4365 |
262 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66908 |
9800 |
47 |
23 |
4 |
0 |
0 |
0 |
| OW |
978 |
2519 |
409 |
584 |
212 |
20 |
0 |
0 |
| VODI |
3086 |
849 |
242 |
736 |
714 |
162 |
2 |
0 |
| ODI |
289 |
135 |
80 |
559 |
1084 |
347 |
24 |
0 |
| CDI |
0 |
24 |
40 |
293 |
1501 |
3392 |
2194 |
131 |
| VCDI |
0 |
10 |
10 |
22 |
106 |
1247 |
3948 |
131 |
|
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