Validation of sea ice concentration - European sector
Bulletin date: 2025-05-29
Data source: OSI SAF N.H. multi-product 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 |
63720 |
11599 |
125 |
103 |
7 |
0 |
0 |
0 |
| OW |
1 |
1697 |
593 |
1226 |
65 |
0 |
0 |
0 |
| VODI |
0 |
79 |
146 |
2350 |
800 |
11 |
0 |
0 |
| ODI |
0 |
0 |
5 |
300 |
2976 |
334 |
4 |
0 |
| CDI |
0 |
0 |
0 |
46 |
1404 |
4071 |
416 |
1 |
| VCDI |
0 |
0 |
0 |
17 |
44 |
1262 |
3408 |
3606 |
|
...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 |
65630 |
10099 |
71 |
32 |
0 |
0 |
0 |
0 |
| OW |
70 |
2003 |
522 |
1016 |
35 |
2 |
0 |
0 |
| VODI |
0 |
116 |
170 |
2122 |
784 |
28 |
0 |
0 |
| ODI |
0 |
0 |
4 |
397 |
2846 |
331 |
14 |
0 |
| CDI |
0 |
0 |
0 |
78 |
1521 |
3337 |
591 |
7 |
| VCDI |
0 |
0 |
0 |
13 |
91 |
1254 |
5070 |
2162 |
|
...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 |
66259 |
11074 |
86 |
54 |
3 |
0 |
0 |
0 |
| OW |
0 |
1302 |
579 |
850 |
61 |
3 |
0 |
0 |
| VODI |
0 |
36 |
93 |
2061 |
714 |
25 |
0 |
0 |
| ODI |
0 |
0 |
0 |
307 |
3056 |
164 |
2 |
0 |
| CDI |
0 |
0 |
0 |
14 |
965 |
3766 |
435 |
1 |
| VCDI |
0 |
0 |
0 |
4 |
27 |
533 |
5291 |
2651 |
|
...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 |
66517 |
11049 |
85 |
69 |
0 |
0 |
0 |
0 |
| OW |
1 |
1376 |
611 |
799 |
80 |
1 |
0 |
0 |
| VODI |
0 |
33 |
119 |
2096 |
589 |
36 |
0 |
0 |
| ODI |
0 |
1 |
5 |
371 |
2631 |
235 |
0 |
0 |
| CDI |
0 |
0 |
1 |
29 |
1416 |
2896 |
1312 |
155 |
| VCDI |
0 |
0 |
0 |
9 |
6 |
768 |
3304 |
3816 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66516 |
11048 |
93 |
76 |
0 |
0 |
0 |
0 |
| OW |
2 |
1359 |
580 |
802 |
79 |
4 |
0 |
0 |
| VODI |
0 |
51 |
142 |
2099 |
655 |
39 |
0 |
0 |
| ODI |
0 |
1 |
5 |
362 |
2538 |
271 |
0 |
0 |
| CDI |
0 |
0 |
1 |
20 |
1418 |
2747 |
1371 |
184 |
| VCDI |
0 |
0 |
0 |
14 |
32 |
875 |
3245 |
3787 |
|
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 |
67044 |
10702 |
66 |
34 |
0 |
0 |
0 |
0 |
| OW |
35 |
1652 |
580 |
755 |
69 |
0 |
0 |
0 |
| VODI |
0 |
154 |
252 |
1889 |
686 |
2 |
0 |
0 |
| ODI |
0 |
2 |
14 |
475 |
2199 |
182 |
0 |
0 |
| CDI |
0 |
0 |
0 |
96 |
1678 |
2706 |
1533 |
9 |
| VCDI |
0 |
0 |
0 |
4 |
15 |
954 |
3989 |
2640 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67042 |
10695 |
76 |
36 |
0 |
0 |
0 |
0 |
| OW |
37 |
1635 |
544 |
747 |
91 |
0 |
0 |
0 |
| VODI |
0 |
176 |
285 |
1878 |
731 |
2 |
0 |
0 |
| ODI |
0 |
4 |
7 |
491 |
2119 |
226 |
0 |
0 |
| CDI |
0 |
0 |
0 |
91 |
1637 |
2528 |
1538 |
6 |
| VCDI |
0 |
0 |
0 |
10 |
69 |
1088 |
3984 |
2643 |
|
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 |
67584 |
10893 |
62 |
31 |
0 |
0 |
0 |
0 |
| OW |
0 |
1361 |
783 |
704 |
7 |
0 |
0 |
0 |
| VODI |
0 |
8 |
49 |
2531 |
470 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
220 |
2914 |
119 |
0 |
0 |
| CDI |
0 |
0 |
0 |
25 |
1202 |
4022 |
571 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
386 |
5458 |
1015 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67573 |
9925 |
59 |
30 |
0 |
0 |
0 |
0 |
| OW |
11 |
2015 |
487 |
873 |
94 |
0 |
0 |
0 |
| VODI |
0 |
320 |
312 |
1829 |
702 |
1 |
0 |
0 |
| ODI |
0 |
2 |
36 |
627 |
1913 |
306 |
0 |
0 |
| CDI |
0 |
0 |
0 |
143 |
1758 |
2709 |
1338 |
3 |
| VCDI |
0 |
0 |
0 |
9 |
126 |
1512 |
4691 |
1012 |
|
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 |
68256 |
10695 |
57 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
1519 |
587 |
837 |
35 |
0 |
0 |
0 |
| VODI |
0 |
84 |
126 |
2086 |
609 |
14 |
0 |
0 |
| ODI |
0 |
0 |
0 |
273 |
2424 |
130 |
0 |
0 |
| CDI |
0 |
0 |
0 |
35 |
1411 |
4325 |
1236 |
3 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
533 |
4321 |
797 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68247 |
9664 |
52 |
43 |
0 |
0 |
0 |
0 |
| OW |
9 |
2142 |
446 |
937 |
102 |
16 |
0 |
0 |
| VODI |
0 |
479 |
219 |
1449 |
755 |
7 |
0 |
0 |
| ODI |
0 |
13 |
50 |
653 |
1713 |
172 |
0 |
0 |
| CDI |
0 |
0 |
3 |
159 |
1715 |
3515 |
1887 |
64 |
| VCDI |
0 |
0 |
0 |
13 |
194 |
1292 |
3670 |
736 |
|
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 |
68918 |
10471 |
24 |
6 |
1 |
0 |
0 |
0 |
| OW |
0 |
1921 |
552 |
593 |
22 |
0 |
0 |
0 |
| VODI |
0 |
229 |
216 |
1756 |
644 |
20 |
0 |
0 |
| ODI |
0 |
0 |
0 |
416 |
2194 |
285 |
4 |
0 |
| CDI |
0 |
0 |
0 |
33 |
1062 |
3604 |
1896 |
9 |
| VCDI |
0 |
0 |
0 |
4 |
47 |
523 |
4466 |
500 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68897 |
9373 |
64 |
41 |
2 |
0 |
0 |
0 |
| OW |
21 |
2545 |
373 |
750 |
110 |
8 |
0 |
0 |
| VODI |
0 |
647 |
265 |
1056 |
770 |
36 |
0 |
0 |
| ODI |
0 |
53 |
85 |
647 |
1193 |
284 |
4 |
0 |
| CDI |
0 |
3 |
5 |
310 |
1766 |
3151 |
2101 |
273 |
| VCDI |
0 |
0 |
0 |
4 |
129 |
953 |
4261 |
236 |
|
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