Validation of sea ice concentration - European sector
Bulletin date: 2025-05-01
Data source: OSI SAF N.H. multi-product 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 |
60026 |
13695 |
363 |
515 |
19 |
0 |
0 |
0 |
| OW |
19 |
835 |
316 |
779 |
255 |
1 |
0 |
0 |
| VODI |
6 |
48 |
86 |
908 |
860 |
102 |
4 |
0 |
| ODI |
3 |
3 |
0 |
170 |
951 |
568 |
50 |
0 |
| CDI |
2 |
0 |
0 |
4 |
576 |
2663 |
1705 |
25 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1084 |
7042 |
6730 |
|
...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 |
59985 |
13724 |
303 |
399 |
61 |
1 |
0 |
0 |
| OW |
21 |
917 |
306 |
892 |
254 |
34 |
1 |
0 |
| VODI |
5 |
91 |
110 |
896 |
873 |
184 |
11 |
0 |
| ODI |
6 |
3 |
0 |
183 |
923 |
689 |
39 |
0 |
| CDI |
0 |
0 |
0 |
5 |
638 |
2199 |
1716 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1240 |
7224 |
6480 |
|
...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 |
60360 |
13781 |
283 |
321 |
31 |
0 |
0 |
0 |
| OW |
10 |
700 |
361 |
805 |
180 |
8 |
0 |
0 |
| VODI |
6 |
51 |
55 |
1169 |
662 |
21 |
0 |
0 |
| ODI |
2 |
0 |
0 |
127 |
1410 |
234 |
2 |
0 |
| CDI |
0 |
0 |
0 |
1 |
678 |
3238 |
638 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
1631 |
7991 |
5645 |
|
...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 |
60639 |
13387 |
279 |
204 |
7 |
0 |
0 |
0 |
| OW |
6 |
734 |
373 |
975 |
129 |
0 |
0 |
0 |
| VODI |
6 |
26 |
62 |
1190 |
658 |
40 |
0 |
0 |
| ODI |
1 |
0 |
0 |
181 |
1395 |
276 |
11 |
0 |
| CDI |
0 |
0 |
0 |
8 |
802 |
3786 |
1580 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1426 |
6484 |
5747 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60639 |
13382 |
303 |
241 |
6 |
0 |
0 |
0 |
| OW |
6 |
739 |
356 |
953 |
133 |
0 |
0 |
0 |
| VODI |
5 |
26 |
55 |
1189 |
705 |
29 |
0 |
0 |
| ODI |
2 |
0 |
0 |
168 |
1335 |
298 |
10 |
0 |
| CDI |
0 |
0 |
0 |
7 |
812 |
3827 |
1603 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1374 |
6462 |
5747 |
|
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 |
61428 |
12564 |
181 |
145 |
2 |
0 |
0 |
0 |
| OW |
30 |
862 |
445 |
796 |
132 |
0 |
0 |
0 |
| VODI |
4 |
94 |
122 |
1166 |
652 |
54 |
4 |
0 |
| ODI |
1 |
0 |
8 |
371 |
1428 |
438 |
23 |
0 |
| CDI |
0 |
0 |
0 |
37 |
1160 |
4095 |
1655 |
10 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
1014 |
6326 |
5157 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61412 |
12656 |
214 |
182 |
1 |
0 |
0 |
0 |
| OW |
45 |
776 |
415 |
802 |
154 |
0 |
0 |
0 |
| VODI |
5 |
88 |
120 |
1154 |
681 |
63 |
2 |
0 |
| ODI |
0 |
0 |
7 |
339 |
1431 |
469 |
26 |
0 |
| CDI |
1 |
0 |
0 |
38 |
1102 |
4199 |
1579 |
9 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
870 |
6401 |
5158 |
|
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 |
60920 |
13083 |
262 |
289 |
9 |
0 |
0 |
0 |
| OW |
46 |
708 |
343 |
920 |
216 |
0 |
0 |
0 |
| VODI |
7 |
55 |
118 |
1060 |
748 |
75 |
0 |
0 |
| ODI |
1 |
0 |
5 |
361 |
1575 |
574 |
27 |
0 |
| CDI |
0 |
0 |
0 |
35 |
1208 |
4812 |
1988 |
10 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
910 |
5472 |
4566 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60909 |
13042 |
255 |
277 |
8 |
0 |
0 |
0 |
| OW |
56 |
742 |
354 |
942 |
225 |
0 |
0 |
0 |
| VODI |
8 |
62 |
111 |
1092 |
833 |
60 |
0 |
0 |
| ODI |
1 |
0 |
8 |
316 |
1625 |
690 |
32 |
0 |
| CDI |
0 |
0 |
0 |
38 |
1057 |
4586 |
1441 |
20 |
| VCDI |
0 |
0 |
0 |
0 |
21 |
1035 |
6014 |
4556 |
|
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 |
60871 |
13067 |
229 |
151 |
2 |
0 |
0 |
0 |
| OW |
62 |
804 |
475 |
820 |
72 |
1 |
0 |
0 |
| VODI |
3 |
48 |
136 |
1530 |
727 |
55 |
0 |
0 |
| ODI |
0 |
0 |
0 |
314 |
2139 |
236 |
3 |
0 |
| CDI |
0 |
0 |
0 |
5 |
1632 |
4594 |
671 |
56 |
| VCDI |
0 |
0 |
0 |
0 |
125 |
2111 |
6547 |
2930 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60821 |
12908 |
245 |
224 |
5 |
0 |
0 |
0 |
| OW |
103 |
898 |
434 |
891 |
186 |
3 |
0 |
0 |
| VODI |
12 |
111 |
153 |
1175 |
833 |
105 |
1 |
0 |
| ODI |
0 |
2 |
8 |
464 |
2024 |
543 |
53 |
0 |
| CDI |
0 |
0 |
0 |
66 |
1459 |
4335 |
942 |
78 |
| VCDI |
0 |
0 |
0 |
0 |
190 |
2011 |
6225 |
2908 |
|
Date: 2025-05-09:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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