Validation of sea ice concentration - European sector
Bulletin date: 2025-04-17
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-04-11:
| 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 |
58558 |
13755 |
208 |
190 |
34 |
8 |
2 |
0 |
| OW |
630 |
953 |
221 |
515 |
258 |
49 |
8 |
0 |
| VODI |
1851 |
240 |
156 |
483 |
560 |
181 |
39 |
0 |
| ODI |
1735 |
60 |
49 |
237 |
625 |
528 |
71 |
0 |
| CDI |
0 |
13 |
27 |
149 |
709 |
1961 |
828 |
0 |
| VCDI |
0 |
0 |
2 |
28 |
266 |
3077 |
11485 |
2113 |
|
...date precedes bulletin
|
Date: 2025-04-13:
| 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 |
58072 |
14117 |
167 |
181 |
61 |
10 |
0 |
0 |
| OW |
629 |
925 |
288 |
525 |
220 |
41 |
12 |
0 |
| VODI |
1852 |
201 |
138 |
496 |
540 |
246 |
25 |
0 |
| ODI |
1734 |
47 |
50 |
225 |
621 |
644 |
177 |
0 |
| CDI |
0 |
10 |
24 |
184 |
669 |
1909 |
1339 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
274 |
1930 |
10053 |
4222 |
|
...date precedes bulletin
|
Date: 2025-04-15:
| 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 |
57986 |
14700 |
195 |
228 |
52 |
4 |
0 |
0 |
| OW |
655 |
739 |
304 |
459 |
189 |
48 |
1 |
0 |
| VODI |
1865 |
136 |
160 |
609 |
533 |
196 |
24 |
0 |
| ODI |
1720 |
18 |
20 |
229 |
776 |
658 |
87 |
0 |
| CDI |
0 |
25 |
15 |
161 |
613 |
2204 |
1451 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
40 |
1125 |
10087 |
4550 |
|
...date precedes bulletin
|
Date: 2025-04-17:
| 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 |
58568 |
14186 |
188 |
210 |
53 |
13 |
0 |
0 |
| OW |
651 |
884 |
249 |
388 |
215 |
88 |
0 |
0 |
| VODI |
1874 |
280 |
146 |
449 |
451 |
312 |
53 |
0 |
| ODI |
1710 |
60 |
58 |
298 |
609 |
615 |
175 |
0 |
| CDI |
0 |
12 |
4 |
83 |
504 |
1876 |
1668 |
31 |
| VCDI |
0 |
9 |
0 |
7 |
68 |
1330 |
9373 |
5114 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58569 |
14158 |
193 |
205 |
63 |
12 |
0 |
0 |
| OW |
650 |
897 |
242 |
387 |
204 |
81 |
1 |
0 |
| VODI |
1881 |
293 |
151 |
464 |
465 |
318 |
49 |
0 |
| ODI |
1703 |
63 |
56 |
301 |
622 |
667 |
177 |
0 |
| CDI |
0 |
16 |
3 |
75 |
483 |
1820 |
2015 |
33 |
| VCDI |
0 |
4 |
0 |
3 |
63 |
1336 |
9027 |
5112 |
|
Date: 2025-04-19:
| 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 |
58195 |
14303 |
216 |
222 |
54 |
16 |
0 |
0 |
| OW |
674 |
988 |
201 |
388 |
245 |
102 |
2 |
0 |
| VODI |
1886 |
363 |
200 |
515 |
472 |
328 |
93 |
0 |
| ODI |
1696 |
32 |
67 |
321 |
485 |
645 |
265 |
0 |
| CDI |
0 |
8 |
2 |
141 |
680 |
1670 |
1918 |
1 |
| VCDI |
0 |
0 |
0 |
17 |
58 |
1056 |
9823 |
4514 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58192 |
14285 |
217 |
233 |
58 |
14 |
0 |
0 |
| OW |
678 |
991 |
202 |
386 |
243 |
112 |
2 |
0 |
| VODI |
1890 |
380 |
192 |
512 |
471 |
323 |
104 |
0 |
| ODI |
1691 |
31 |
75 |
325 |
546 |
681 |
282 |
0 |
| CDI |
0 |
7 |
0 |
134 |
618 |
1720 |
2134 |
1 |
| VCDI |
0 |
0 |
0 |
14 |
58 |
967 |
9579 |
4514 |
|
Date: 2025-04-21:
| 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 |
58091 |
14660 |
255 |
268 |
71 |
29 |
0 |
0 |
| OW |
684 |
1071 |
257 |
478 |
223 |
60 |
0 |
0 |
| VODI |
1904 |
159 |
177 |
626 |
703 |
287 |
27 |
0 |
| ODI |
1669 |
1 |
22 |
199 |
633 |
655 |
130 |
0 |
| CDI |
0 |
0 |
0 |
47 |
290 |
1493 |
1049 |
3 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
927 |
10309 |
5399 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58091 |
14361 |
246 |
264 |
72 |
17 |
0 |
0 |
| OW |
683 |
1056 |
204 |
401 |
299 |
109 |
3 |
0 |
| VODI |
1899 |
453 |
199 |
512 |
520 |
377 |
97 |
0 |
| ODI |
1675 |
17 |
62 |
337 |
537 |
553 |
292 |
0 |
| CDI |
0 |
4 |
0 |
104 |
471 |
1403 |
2114 |
7 |
| VCDI |
0 |
0 |
0 |
0 |
27 |
992 |
9009 |
5395 |
|
Date: 2025-04-23:
| 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 |
58908 |
13839 |
272 |
224 |
97 |
33 |
0 |
0 |
| OW |
778 |
954 |
267 |
445 |
208 |
67 |
3 |
0 |
| VODI |
1932 |
102 |
175 |
579 |
612 |
320 |
39 |
0 |
| ODI |
1657 |
0 |
7 |
219 |
490 |
666 |
159 |
0 |
| CDI |
0 |
0 |
0 |
45 |
205 |
1445 |
2701 |
39 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
662 |
9430 |
5281 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58903 |
13509 |
261 |
247 |
87 |
11 |
0 |
0 |
| OW |
779 |
1042 |
209 |
352 |
270 |
111 |
9 |
0 |
| VODI |
1927 |
327 |
213 |
539 |
469 |
399 |
137 |
0 |
| ODI |
1663 |
17 |
38 |
307 |
464 |
567 |
353 |
0 |
| CDI |
3 |
0 |
0 |
67 |
317 |
1458 |
3664 |
45 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
647 |
8169 |
5275 |
|
Date: 2025-04-25:
| 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 |
59528 |
13154 |
197 |
164 |
32 |
4 |
0 |
0 |
| OW |
799 |
1081 |
287 |
496 |
268 |
33 |
1 |
0 |
| VODI |
1941 |
209 |
188 |
619 |
611 |
326 |
53 |
0 |
| ODI |
1630 |
1 |
20 |
244 |
509 |
680 |
236 |
0 |
| CDI |
0 |
0 |
1 |
42 |
289 |
2017 |
2538 |
3 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
1010 |
7537 |
6101 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59522 |
12808 |
214 |
290 |
89 |
13 |
0 |
0 |
| OW |
799 |
1205 |
197 |
320 |
282 |
127 |
24 |
0 |
| VODI |
1937 |
344 |
208 |
531 |
497 |
380 |
180 |
0 |
| ODI |
1638 |
76 |
57 |
252 |
402 |
579 |
339 |
0 |
| CDI |
2 |
12 |
17 |
172 |
441 |
2101 |
3234 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
870 |
6588 |
6104 |
|
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