Validation of sea ice concentration - European sector
Bulletin date: 2025-05-08
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-05-04:
| 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 |
60980 |
12898 |
182 |
170 |
9 |
0 |
0 |
0 |
| OW |
40 |
818 |
347 |
950 |
140 |
0 |
0 |
0 |
| VODI |
5 |
91 |
122 |
1133 |
713 |
63 |
0 |
0 |
| ODI |
1 |
1 |
16 |
382 |
1564 |
566 |
21 |
0 |
| CDI |
0 |
0 |
0 |
19 |
1154 |
4774 |
1347 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
26 |
909 |
5878 |
5095 |
|
...date precedes bulletin
|
Date: 2025-05-06:
| 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 |
61124 |
13033 |
170 |
143 |
4 |
0 |
0 |
0 |
| OW |
48 |
732 |
439 |
686 |
106 |
1 |
0 |
0 |
| VODI |
3 |
49 |
118 |
1577 |
588 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
245 |
2170 |
185 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
1305 |
4817 |
588 |
4 |
| VCDI |
0 |
0 |
0 |
0 |
63 |
1591 |
5338 |
5265 |
|
...date precedes bulletin
|
Date: 2025-05-08:
| 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 |
61079 |
12814 |
175 |
180 |
3 |
0 |
0 |
0 |
| OW |
44 |
1074 |
413 |
669 |
116 |
6 |
0 |
0 |
| VODI |
0 |
68 |
112 |
1551 |
729 |
66 |
2 |
0 |
| ODI |
0 |
1 |
1 |
308 |
2283 |
308 |
14 |
0 |
| CDI |
0 |
0 |
0 |
13 |
1498 |
4361 |
1131 |
8 |
| VCDI |
0 |
0 |
0 |
4 |
166 |
1910 |
6550 |
2759 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61058 |
12784 |
185 |
171 |
4 |
1 |
0 |
0 |
| OW |
64 |
1104 |
402 |
696 |
114 |
8 |
0 |
0 |
| VODI |
1 |
68 |
113 |
1514 |
777 |
74 |
2 |
0 |
| ODI |
0 |
1 |
1 |
327 |
2267 |
339 |
11 |
0 |
| CDI |
0 |
0 |
0 |
15 |
1474 |
4358 |
1210 |
19 |
| VCDI |
0 |
0 |
0 |
2 |
159 |
1871 |
6474 |
2748 |
|
Date: 2025-05-10:
| 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 |
62252 |
11629 |
104 |
119 |
33 |
0 |
0 |
0 |
| OW |
86 |
1435 |
356 |
541 |
167 |
24 |
0 |
0 |
| VODI |
0 |
217 |
257 |
1496 |
748 |
114 |
8 |
0 |
| ODI |
0 |
20 |
24 |
503 |
2135 |
435 |
27 |
0 |
| CDI |
0 |
3 |
14 |
72 |
1889 |
4124 |
1335 |
6 |
| VCDI |
0 |
0 |
0 |
26 |
193 |
1398 |
6347 |
2279 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
62240 |
11655 |
102 |
121 |
48 |
0 |
0 |
0 |
| OW |
98 |
1407 |
358 |
573 |
182 |
32 |
0 |
0 |
| VODI |
0 |
227 |
261 |
1440 |
741 |
130 |
8 |
0 |
| ODI |
0 |
13 |
21 |
523 |
2124 |
451 |
23 |
0 |
| CDI |
0 |
2 |
13 |
76 |
1885 |
4063 |
1336 |
6 |
| VCDI |
0 |
0 |
0 |
24 |
185 |
1419 |
6350 |
2279 |
|
Date: 2025-05-12:
| 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 |
62919 |
11536 |
92 |
107 |
11 |
0 |
0 |
0 |
| OW |
13 |
1317 |
459 |
558 |
32 |
3 |
0 |
0 |
| VODI |
0 |
22 |
73 |
2361 |
608 |
39 |
0 |
0 |
| ODI |
0 |
0 |
5 |
340 |
3563 |
275 |
0 |
0 |
| CDI |
0 |
0 |
0 |
56 |
1552 |
4121 |
351 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
50 |
797 |
7400 |
1754 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
62860 |
10993 |
95 |
117 |
19 |
0 |
0 |
0 |
| OW |
72 |
1583 |
259 |
693 |
127 |
20 |
0 |
0 |
| VODI |
0 |
285 |
205 |
1515 |
952 |
172 |
0 |
0 |
| ODI |
0 |
13 |
61 |
887 |
2113 |
627 |
8 |
0 |
| CDI |
0 |
1 |
9 |
195 |
2453 |
3221 |
1547 |
5 |
| VCDI |
0 |
0 |
0 |
15 |
152 |
1195 |
6196 |
1751 |
|
Date: 2025-05-14:
| 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 |
63978 |
10664 |
61 |
29 |
0 |
0 |
0 |
0 |
| OW |
23 |
1660 |
431 |
369 |
59 |
2 |
0 |
0 |
| VODI |
0 |
399 |
264 |
2102 |
736 |
33 |
0 |
0 |
| ODI |
0 |
135 |
22 |
594 |
2753 |
300 |
0 |
0 |
| CDI |
0 |
8 |
4 |
96 |
1685 |
3903 |
613 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
1208 |
7387 |
879 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63916 |
10236 |
66 |
51 |
11 |
0 |
0 |
0 |
| OW |
85 |
1813 |
317 |
410 |
96 |
1 |
0 |
0 |
| VODI |
0 |
687 |
318 |
1583 |
806 |
92 |
0 |
0 |
| ODI |
0 |
127 |
76 |
971 |
1966 |
746 |
1 |
0 |
| CDI |
0 |
3 |
5 |
169 |
2295 |
3282 |
1603 |
34 |
| VCDI |
0 |
0 |
0 |
6 |
78 |
1325 |
6396 |
845 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63025 |
11140 |
121 |
183 |
25 |
0 |
0 |
0 |
| OW |
86 |
1595 |
263 |
611 |
143 |
3 |
0 |
0 |
| VODI |
4 |
578 |
330 |
2069 |
709 |
74 |
0 |
0 |
| ODI |
0 |
105 |
88 |
1075 |
1694 |
688 |
13 |
0 |
| CDI |
0 |
1 |
5 |
219 |
2370 |
3431 |
1867 |
75 |
| VCDI |
0 |
0 |
0 |
1 |
47 |
1253 |
5966 |
559 |
|
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