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 |
60940 |
13347 |
209 |
126 |
4 |
0 |
0 |
0 |
| OW |
31 |
481 |
480 |
736 |
55 |
0 |
0 |
0 |
| VODI |
3 |
18 |
39 |
1667 |
540 |
7 |
0 |
0 |
| ODI |
0 |
0 |
0 |
136 |
2311 |
169 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
847 |
5411 |
557 |
2 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
784 |
6930 |
4574 |
|
|
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 |
60936 |
13101 |
192 |
154 |
1 |
0 |
0 |
0 |
| OW |
46 |
825 |
441 |
796 |
76 |
0 |
0 |
0 |
| VODI |
2 |
49 |
129 |
1550 |
678 |
51 |
0 |
0 |
| ODI |
0 |
0 |
0 |
287 |
2150 |
230 |
4 |
0 |
| CDI |
0 |
0 |
0 |
7 |
1661 |
4549 |
603 |
36 |
| VCDI |
0 |
0 |
0 |
0 |
131 |
2167 |
6614 |
2950 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
60862 |
12887 |
225 |
224 |
5 |
0 |
0 |
0 |
| OW |
110 |
969 |
377 |
870 |
186 |
3 |
0 |
0 |
| VODI |
12 |
117 |
152 |
1170 |
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 |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
62067 |
11843 |
113 |
143 |
24 |
0 |
0 |
0 |
| OW |
74 |
1292 |
360 |
572 |
117 |
11 |
0 |
0 |
| VODI |
0 |
169 |
233 |
1448 |
766 |
75 |
0 |
0 |
| ODI |
0 |
12 |
13 |
459 |
2212 |
321 |
13 |
0 |
| CDI |
0 |
2 |
4 |
55 |
1872 |
4081 |
1238 |
11 |
| VCDI |
0 |
0 |
1 |
26 |
189 |
1368 |
6494 |
2738 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61985 |
11457 |
148 |
181 |
15 |
0 |
0 |
0 |
| OW |
147 |
1530 |
293 |
600 |
211 |
6 |
0 |
0 |
| VODI |
9 |
299 |
237 |
1140 |
946 |
122 |
7 |
0 |
| ODI |
0 |
20 |
36 |
641 |
2224 |
628 |
51 |
0 |
| CDI |
0 |
12 |
10 |
138 |
1563 |
4046 |
1095 |
62 |
| VCDI |
0 |
0 |
0 |
3 |
221 |
1054 |
6592 |
2687 |
|
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