Validation of sea ice concentration - European sector
Bulletin date: 2025-04-24
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-04-20:
| 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 |
57961 |
14456 |
243 |
231 |
68 |
21 |
0 |
0 |
| OW |
671 |
984 |
180 |
466 |
273 |
94 |
1 |
0 |
| VODI |
1890 |
394 |
183 |
518 |
529 |
350 |
103 |
0 |
| ODI |
1690 |
40 |
71 |
344 |
488 |
587 |
291 |
0 |
| CDI |
0 |
8 |
4 |
163 |
634 |
1567 |
1795 |
13 |
| VCDI |
0 |
0 |
0 |
8 |
38 |
1081 |
9860 |
4564 |
|
...date precedes bulletin
|
Date: 2025-04-22:
| 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 |
58783 |
14104 |
230 |
227 |
78 |
34 |
0 |
0 |
| OW |
758 |
953 |
304 |
427 |
201 |
61 |
0 |
0 |
| VODI |
1933 |
99 |
169 |
612 |
636 |
331 |
31 |
0 |
| ODI |
1664 |
0 |
11 |
194 |
534 |
608 |
162 |
0 |
| CDI |
0 |
0 |
4 |
40 |
191 |
1458 |
1736 |
20 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
805 |
9821 |
5640 |
|
...date precedes bulletin
|
Date: 2025-04-24:
| 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 |
58402 |
14283 |
205 |
198 |
87 |
14 |
0 |
0 |
| OW |
760 |
1037 |
286 |
441 |
231 |
49 |
0 |
0 |
| VODI |
1923 |
172 |
167 |
610 |
596 |
324 |
34 |
0 |
| ODI |
1642 |
3 |
17 |
234 |
507 |
661 |
240 |
0 |
| CDI |
0 |
0 |
0 |
34 |
215 |
1720 |
3040 |
42 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
686 |
8713 |
5285 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58402 |
14287 |
215 |
199 |
87 |
5 |
0 |
0 |
| OW |
761 |
1005 |
270 |
449 |
236 |
51 |
0 |
0 |
| VODI |
1923 |
198 |
172 |
595 |
593 |
331 |
32 |
0 |
| ODI |
1641 |
5 |
18 |
246 |
517 |
697 |
285 |
0 |
| CDI |
0 |
0 |
0 |
28 |
204 |
1703 |
3156 |
41 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
667 |
8554 |
5286 |
|
Date: 2025-04-26:
| 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 |
59041 |
13560 |
185 |
144 |
30 |
1 |
0 |
0 |
| OW |
710 |
1108 |
283 |
497 |
310 |
55 |
6 |
0 |
| VODI |
1831 |
242 |
187 |
598 |
555 |
345 |
107 |
0 |
| ODI |
1861 |
0 |
20 |
230 |
534 |
709 |
265 |
0 |
| CDI |
0 |
0 |
1 |
42 |
370 |
1995 |
2463 |
5 |
| VCDI |
0 |
0 |
0 |
0 |
40 |
1229 |
7458 |
5845 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59053 |
13585 |
198 |
164 |
32 |
1 |
0 |
0 |
| OW |
695 |
1070 |
265 |
471 |
296 |
60 |
6 |
0 |
| VODI |
1835 |
251 |
182 |
598 |
584 |
352 |
106 |
0 |
| ODI |
1860 |
4 |
29 |
235 |
526 |
731 |
324 |
0 |
| CDI |
0 |
0 |
2 |
43 |
361 |
1959 |
2554 |
7 |
| VCDI |
0 |
0 |
0 |
0 |
40 |
1231 |
7309 |
5843 |
|
Date: 2025-04-28:
| 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 |
59567 |
13514 |
156 |
94 |
11 |
2 |
0 |
0 |
| OW |
701 |
1072 |
307 |
443 |
113 |
22 |
6 |
0 |
| VODI |
1817 |
181 |
260 |
779 |
519 |
114 |
35 |
0 |
| ODI |
1872 |
2 |
15 |
221 |
861 |
632 |
82 |
0 |
| CDI |
0 |
0 |
0 |
6 |
322 |
2507 |
940 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1343 |
9099 |
5229 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59570 |
13171 |
167 |
136 |
27 |
10 |
8 |
0 |
| OW |
697 |
1245 |
307 |
516 |
231 |
59 |
29 |
0 |
| VODI |
1858 |
306 |
187 |
563 |
621 |
348 |
101 |
0 |
| ODI |
1832 |
43 |
65 |
247 |
536 |
809 |
197 |
0 |
| CDI |
0 |
4 |
12 |
80 |
398 |
1971 |
2183 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
31 |
1423 |
7644 |
5229 |
|
Date: 2025-04-30:
| 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 |
59711 |
13070 |
152 |
94 |
9 |
0 |
0 |
0 |
| OW |
702 |
1185 |
342 |
480 |
179 |
22 |
0 |
0 |
| VODI |
1840 |
208 |
201 |
777 |
563 |
184 |
17 |
0 |
| ODI |
1846 |
17 |
29 |
294 |
807 |
471 |
80 |
0 |
| CDI |
0 |
1 |
5 |
31 |
508 |
2890 |
1724 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
57 |
1278 |
9657 |
3425 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59710 |
12788 |
224 |
212 |
60 |
10 |
0 |
0 |
| OW |
700 |
1289 |
276 |
603 |
356 |
131 |
10 |
0 |
| VODI |
1883 |
303 |
157 |
508 |
676 |
340 |
72 |
0 |
| ODI |
1806 |
92 |
49 |
263 |
531 |
745 |
272 |
0 |
| CDI |
0 |
9 |
23 |
88 |
425 |
2293 |
2829 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
75 |
1326 |
8295 |
3425 |
|
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 |
59235 |
13281 |
159 |
104 |
8 |
0 |
0 |
0 |
| OW |
690 |
1246 |
344 |
500 |
168 |
8 |
1 |
0 |
| VODI |
1859 |
241 |
192 |
784 |
540 |
189 |
41 |
0 |
| ODI |
1823 |
24 |
42 |
309 |
885 |
634 |
181 |
0 |
| CDI |
0 |
2 |
3 |
49 |
641 |
3605 |
2332 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
43 |
1369 |
7422 |
3903 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59229 |
13149 |
283 |
286 |
86 |
9 |
0 |
0 |
| OW |
700 |
1319 |
281 |
660 |
375 |
132 |
42 |
0 |
| VODI |
1899 |
253 |
113 |
526 |
693 |
377 |
128 |
0 |
| ODI |
1779 |
66 |
51 |
222 |
584 |
792 |
302 |
0 |
| CDI |
0 |
7 |
12 |
52 |
482 |
2964 |
2336 |
17 |
| VCDI |
0 |
0 |
0 |
5 |
65 |
1531 |
7169 |
3886 |
|
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