Validation of sea ice concentration - European sector
Bulletin date: 2025-05-01
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-04-27:
| 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 |
58887 |
13657 |
171 |
152 |
31 |
3 |
1 |
0 |
| OW |
710 |
1240 |
316 |
509 |
257 |
54 |
28 |
0 |
| VODI |
1849 |
229 |
212 |
612 |
607 |
357 |
115 |
0 |
| ODI |
1849 |
1 |
7 |
201 |
526 |
814 |
233 |
0 |
| CDI |
0 |
0 |
0 |
27 |
358 |
1789 |
2313 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
25 |
1131 |
7904 |
5687 |
|
...date precedes bulletin
|
Date: 2025-04-29:
| 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 |
59708 |
13240 |
132 |
89 |
11 |
2 |
0 |
0 |
| OW |
704 |
1121 |
335 |
453 |
152 |
20 |
5 |
0 |
| VODI |
1827 |
212 |
220 |
780 |
531 |
157 |
16 |
0 |
| ODI |
1859 |
5 |
14 |
238 |
824 |
578 |
65 |
0 |
| CDI |
0 |
0 |
1 |
37 |
407 |
2724 |
1311 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
60 |
1351 |
8995 |
4673 |
|
...date precedes bulletin
|
Date: 2025-05-01:
| 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 |
59464 |
13195 |
147 |
95 |
12 |
0 |
0 |
0 |
| OW |
703 |
1157 |
373 |
514 |
183 |
19 |
2 |
0 |
| VODI |
1855 |
203 |
205 |
786 |
528 |
166 |
36 |
0 |
| ODI |
1829 |
8 |
36 |
268 |
835 |
520 |
151 |
0 |
| CDI |
0 |
0 |
0 |
36 |
496 |
3277 |
2249 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
55 |
1386 |
8126 |
3947 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59459 |
13208 |
161 |
122 |
15 |
0 |
0 |
0 |
| OW |
708 |
1165 |
354 |
489 |
182 |
21 |
2 |
0 |
| VODI |
1855 |
182 |
211 |
815 |
548 |
170 |
33 |
0 |
| ODI |
1829 |
8 |
35 |
241 |
804 |
523 |
151 |
0 |
| CDI |
0 |
0 |
0 |
32 |
513 |
3283 |
2302 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
47 |
1371 |
8076 |
3947 |
|
Date: 2025-05-03:
| 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 |
59963 |
12567 |
114 |
50 |
8 |
0 |
0 |
0 |
| OW |
695 |
1244 |
427 |
491 |
138 |
17 |
1 |
0 |
| VODI |
1872 |
263 |
191 |
807 |
532 |
211 |
31 |
0 |
| ODI |
1806 |
45 |
62 |
313 |
981 |
647 |
180 |
0 |
| CDI |
0 |
2 |
7 |
70 |
769 |
3733 |
2259 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
44 |
1002 |
7941 |
3379 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59953 |
12662 |
156 |
73 |
7 |
0 |
0 |
0 |
| OW |
705 |
1162 |
392 |
491 |
165 |
19 |
3 |
0 |
| VODI |
1875 |
251 |
189 |
806 |
550 |
223 |
39 |
0 |
| ODI |
1803 |
44 |
58 |
307 |
962 |
672 |
182 |
0 |
| CDI |
0 |
2 |
6 |
54 |
742 |
3815 |
2198 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
46 |
881 |
7990 |
3379 |
|
Date: 2025-05-05:
| 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 |
59802 |
13078 |
95 |
34 |
5 |
0 |
0 |
0 |
| OW |
793 |
873 |
372 |
408 |
69 |
11 |
3 |
0 |
| VODI |
1881 |
218 |
279 |
1103 |
530 |
78 |
14 |
0 |
| ODI |
1790 |
4 |
14 |
280 |
1516 |
701 |
58 |
0 |
| CDI |
0 |
0 |
0 |
23 |
667 |
4563 |
1462 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
32 |
922 |
8278 |
2906 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59778 |
12850 |
150 |
107 |
10 |
0 |
0 |
0 |
| OW |
818 |
1017 |
374 |
592 |
204 |
46 |
5 |
0 |
| VODI |
1899 |
258 |
171 |
799 |
641 |
205 |
52 |
0 |
| ODI |
1771 |
46 |
61 |
276 |
1110 |
940 |
179 |
0 |
| CDI |
0 |
2 |
4 |
73 |
808 |
4061 |
2082 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
46 |
1023 |
7497 |
2906 |
|
Date: 2025-05-07:
| 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 |
58758 |
13853 |
91 |
56 |
17 |
1 |
0 |
0 |
| OW |
770 |
1212 |
352 |
455 |
121 |
9 |
0 |
0 |
| VODI |
1911 |
281 |
291 |
1038 |
611 |
160 |
31 |
0 |
| ODI |
1752 |
9 |
16 |
401 |
1501 |
605 |
90 |
0 |
| CDI |
0 |
0 |
6 |
79 |
1258 |
4315 |
1059 |
17 |
| VCDI |
0 |
0 |
6 |
25 |
97 |
2026 |
8513 |
1069 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
58756 |
13594 |
116 |
126 |
30 |
0 |
0 |
0 |
| OW |
772 |
1320 |
361 |
519 |
215 |
47 |
1 |
0 |
| VODI |
1926 |
355 |
193 |
829 |
645 |
241 |
77 |
0 |
| ODI |
1737 |
80 |
68 |
438 |
1429 |
817 |
190 |
0 |
| CDI |
0 |
6 |
18 |
113 |
1140 |
4112 |
1339 |
32 |
| VCDI |
0 |
0 |
6 |
29 |
146 |
1899 |
8086 |
1054 |
|
Date: 2025-05-09:
| 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 |
59447 |
12940 |
96 |
78 |
10 |
3 |
0 |
0 |
| OW |
809 |
1515 |
289 |
413 |
116 |
17 |
0 |
0 |
| VODI |
1944 |
387 |
297 |
1003 |
706 |
187 |
65 |
0 |
| ODI |
1715 |
38 |
59 |
471 |
1479 |
791 |
119 |
0 |
| CDI |
0 |
15 |
12 |
106 |
1464 |
3710 |
1833 |
0 |
| VCDI |
0 |
12 |
6 |
51 |
108 |
1546 |
8282 |
723 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
59389 |
12501 |
139 |
129 |
14 |
2 |
0 |
0 |
| OW |
869 |
1749 |
239 |
449 |
175 |
49 |
3 |
0 |
| VODI |
1962 |
476 |
270 |
831 |
752 |
256 |
112 |
0 |
| ODI |
1695 |
130 |
76 |
540 |
1529 |
1063 |
188 |
0 |
| CDI |
0 |
47 |
30 |
115 |
1267 |
3642 |
1739 |
0 |
| VCDI |
0 |
4 |
5 |
58 |
146 |
1242 |
8257 |
723 |
|
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