Validation of sea ice concentration - European sector
Bulletin date: 2025-04-10
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-04:
| 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 |
58948 |
13480 |
215 |
124 |
59 |
18 |
2 |
0 |
| OW |
632 |
857 |
291 |
451 |
138 |
69 |
10 |
0 |
| VODI |
1843 |
218 |
115 |
453 |
504 |
152 |
16 |
0 |
| ODI |
1745 |
68 |
28 |
138 |
442 |
469 |
63 |
0 |
| CDI |
0 |
53 |
43 |
132 |
609 |
2053 |
900 |
0 |
| VCDI |
0 |
11 |
7 |
41 |
256 |
3531 |
8649 |
5029 |
|
...date precedes bulletin
|
Date: 2025-04-06:
| 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 |
58323 |
13657 |
187 |
165 |
73 |
23 |
0 |
0 |
| OW |
683 |
817 |
265 |
463 |
169 |
56 |
13 |
0 |
| VODI |
1837 |
236 |
132 |
441 |
476 |
190 |
27 |
0 |
| ODI |
1753 |
79 |
45 |
154 |
485 |
410 |
92 |
0 |
| CDI |
0 |
33 |
45 |
183 |
702 |
2478 |
1195 |
0 |
| VCDI |
0 |
5 |
8 |
17 |
122 |
1937 |
10014 |
4872 |
|
...date precedes bulletin
|
Date: 2025-04-08:
| 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 |
58163 |
13816 |
472 |
257 |
77 |
7 |
0 |
0 |
| OW |
644 |
916 |
263 |
476 |
206 |
51 |
5 |
0 |
| VODI |
1845 |
162 |
139 |
530 |
593 |
201 |
55 |
0 |
| ODI |
1743 |
10 |
37 |
219 |
685 |
516 |
70 |
0 |
| CDI |
0 |
1 |
4 |
89 |
670 |
2409 |
939 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
125 |
2553 |
8726 |
5183 |
|
...date precedes bulletin
|
Date: 2025-04-10:
| 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 |
58063 |
14380 |
177 |
197 |
34 |
0 |
0 |
0 |
| OW |
635 |
945 |
234 |
526 |
215 |
26 |
6 |
0 |
| VODI |
1849 |
214 |
155 |
486 |
617 |
182 |
29 |
0 |
| ODI |
1737 |
30 |
43 |
263 |
618 |
507 |
82 |
0 |
| CDI |
0 |
8 |
15 |
126 |
752 |
2168 |
694 |
0 |
| VCDI |
0 |
0 |
3 |
29 |
190 |
2573 |
9718 |
4336 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58063 |
14438 |
175 |
203 |
39 |
0 |
0 |
0 |
| OW |
635 |
927 |
251 |
538 |
220 |
28 |
6 |
0 |
| VODI |
1852 |
173 |
146 |
490 |
623 |
175 |
26 |
0 |
| ODI |
1734 |
31 |
40 |
241 |
657 |
544 |
85 |
0 |
| CDI |
0 |
8 |
12 |
123 |
694 |
2227 |
731 |
0 |
| VCDI |
0 |
0 |
3 |
32 |
193 |
2482 |
9681 |
4336 |
|
Date: 2025-04-12:
| 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 |
58310 |
13896 |
194 |
210 |
66 |
11 |
0 |
0 |
| OW |
623 |
889 |
267 |
525 |
255 |
57 |
11 |
0 |
| VODI |
1852 |
186 |
142 |
495 |
529 |
232 |
37 |
0 |
| ODI |
1734 |
39 |
56 |
220 |
618 |
580 |
104 |
0 |
| CDI |
0 |
1 |
11 |
182 |
683 |
2238 |
1158 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
208 |
2374 |
10501 |
3359 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58310 |
13950 |
208 |
213 |
73 |
13 |
0 |
0 |
| OW |
623 |
876 |
258 |
539 |
248 |
55 |
9 |
0 |
| VODI |
1857 |
145 |
146 |
504 |
554 |
235 |
35 |
0 |
| ODI |
1729 |
36 |
46 |
198 |
647 |
657 |
153 |
0 |
| CDI |
0 |
4 |
11 |
178 |
648 |
2230 |
1170 |
0 |
| VCDI |
0 |
0 |
1 |
9 |
189 |
2302 |
10444 |
3359 |
|
Date: 2025-04-14:
| 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 |
57940 |
14611 |
208 |
268 |
62 |
16 |
0 |
0 |
| OW |
626 |
769 |
280 |
523 |
202 |
45 |
2 |
0 |
| VODI |
1865 |
128 |
159 |
651 |
517 |
222 |
32 |
0 |
| ODI |
1720 |
12 |
12 |
190 |
845 |
656 |
62 |
0 |
| CDI |
0 |
3 |
9 |
61 |
569 |
2467 |
947 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
59 |
1344 |
10117 |
4663 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
57938 |
14344 |
168 |
211 |
54 |
10 |
0 |
0 |
| OW |
628 |
951 |
290 |
487 |
190 |
61 |
3 |
0 |
| VODI |
1863 |
164 |
157 |
535 |
477 |
256 |
35 |
0 |
| ODI |
1722 |
49 |
31 |
283 |
590 |
764 |
143 |
0 |
| CDI |
0 |
15 |
22 |
172 |
722 |
2041 |
1590 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
221 |
1618 |
9389 |
4663 |
|
Date: 2025-04-16:
| 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 |
58492 |
14269 |
223 |
202 |
57 |
5 |
0 |
0 |
| OW |
649 |
760 |
262 |
443 |
190 |
69 |
4 |
0 |
| VODI |
1868 |
228 |
148 |
489 |
464 |
294 |
38 |
0 |
| ODI |
1717 |
39 |
51 |
302 |
710 |
595 |
115 |
0 |
| CDI |
0 |
8 |
3 |
66 |
513 |
2296 |
1475 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
45 |
1191 |
10217 |
4364 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58492 |
13788 |
201 |
209 |
57 |
10 |
0 |
0 |
| OW |
649 |
947 |
218 |
413 |
257 |
88 |
8 |
0 |
| VODI |
1868 |
391 |
150 |
335 |
427 |
382 |
48 |
0 |
| ODI |
1717 |
109 |
81 |
341 |
609 |
674 |
175 |
0 |
| CDI |
0 |
68 |
33 |
183 |
501 |
1957 |
1436 |
0 |
| VCDI |
0 |
1 |
4 |
22 |
128 |
1339 |
10182 |
4364 |
|
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 |
58426 |
14236 |
197 |
206 |
52 |
10 |
0 |
0 |
| OW |
689 |
924 |
198 |
374 |
251 |
96 |
3 |
0 |
| VODI |
1881 |
333 |
184 |
486 |
427 |
312 |
57 |
0 |
| ODI |
1702 |
46 |
66 |
305 |
578 |
650 |
183 |
0 |
| CDI |
0 |
23 |
6 |
117 |
577 |
1796 |
1940 |
19 |
| VCDI |
0 |
3 |
3 |
23 |
91 |
1138 |
9706 |
4548 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58430 |
13849 |
181 |
218 |
66 |
23 |
2 |
0 |
| OW |
685 |
991 |
170 |
335 |
296 |
113 |
13 |
0 |
| VODI |
1884 |
486 |
164 |
404 |
371 |
429 |
65 |
0 |
| ODI |
1699 |
163 |
93 |
345 |
523 |
613 |
300 |
0 |
| CDI |
0 |
71 |
31 |
155 |
489 |
1352 |
2015 |
1 |
| VCDI |
0 |
5 |
15 |
54 |
231 |
1472 |
9494 |
4566 |
|
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