Validation of sea ice concentration - European sector
Bulletin date: 2025-05-15
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-05-11:
| 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 |
59863 |
12403 |
56 |
81 |
8 |
1 |
0 |
0 |
| OW |
834 |
1757 |
320 |
423 |
102 |
16 |
9 |
0 |
| VODI |
1977 |
582 |
339 |
995 |
667 |
222 |
64 |
0 |
| ODI |
1671 |
114 |
108 |
658 |
1604 |
815 |
145 |
0 |
| CDI |
0 |
41 |
19 |
202 |
1944 |
3383 |
1737 |
3 |
| VCDI |
0 |
15 |
9 |
31 |
185 |
2059 |
7312 |
88 |
|
...date precedes bulletin
|
Date: 2025-05-13:
| 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 |
61200 |
11778 |
60 |
30 |
1 |
0 |
0 |
0 |
| OW |
808 |
1718 |
326 |
346 |
36 |
8 |
0 |
0 |
| VODI |
2037 |
382 |
409 |
1501 |
768 |
99 |
3 |
0 |
| ODI |
1600 |
21 |
45 |
617 |
2467 |
889 |
24 |
0 |
| CDI |
0 |
19 |
17 |
152 |
1243 |
3640 |
932 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
20 |
1496 |
7650 |
517 |
|
...date precedes bulletin
|
Date: 2025-05-15:
| 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 |
61900 |
11112 |
32 |
18 |
3 |
0 |
0 |
0 |
| OW |
815 |
2069 |
229 |
221 |
53 |
12 |
2 |
0 |
| VODI |
2078 |
592 |
508 |
1666 |
835 |
72 |
23 |
0 |
| ODI |
1550 |
39 |
53 |
751 |
2003 |
783 |
46 |
0 |
| CDI |
0 |
8 |
22 |
148 |
1417 |
3749 |
1268 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
19 |
1632 |
7112 |
22 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61890 |
11134 |
34 |
20 |
4 |
0 |
0 |
0 |
| OW |
825 |
2026 |
243 |
225 |
52 |
11 |
2 |
0 |
| VODI |
2078 |
614 |
491 |
1699 |
846 |
80 |
27 |
0 |
| ODI |
1550 |
36 |
54 |
712 |
1992 |
754 |
60 |
0 |
| CDI |
0 |
10 |
22 |
146 |
1415 |
3801 |
1333 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
21 |
1602 |
7029 |
22 |
|
Date: 2025-05-17:
| 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 |
61230 |
11705 |
36 |
34 |
11 |
0 |
0 |
0 |
| OW |
822 |
2060 |
313 |
272 |
102 |
3 |
3 |
0 |
| VODI |
2118 |
593 |
497 |
1888 |
785 |
61 |
26 |
0 |
| ODI |
1497 |
44 |
51 |
730 |
1941 |
756 |
53 |
0 |
| CDI |
0 |
10 |
22 |
142 |
1567 |
3601 |
1765 |
0 |
| VCDI |
0 |
0 |
2 |
10 |
51 |
1360 |
6272 |
429 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61230 |
11736 |
47 |
38 |
18 |
0 |
0 |
0 |
| OW |
822 |
2016 |
317 |
274 |
96 |
3 |
5 |
0 |
| VODI |
2118 |
604 |
476 |
1918 |
858 |
59 |
28 |
0 |
| ODI |
1497 |
46 |
58 |
692 |
1820 |
770 |
56 |
0 |
| CDI |
0 |
10 |
22 |
145 |
1622 |
3688 |
1655 |
1 |
| VCDI |
0 |
0 |
1 |
9 |
43 |
1261 |
6375 |
428 |
|
Date: 2025-05-19:
| 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 |
61009 |
12678 |
93 |
80 |
34 |
2 |
0 |
0 |
| OW |
832 |
1775 |
503 |
572 |
99 |
14 |
2 |
0 |
| VODI |
2180 |
264 |
368 |
2142 |
808 |
63 |
23 |
0 |
| ODI |
1423 |
22 |
38 |
418 |
2501 |
887 |
37 |
0 |
| CDI |
0 |
2 |
10 |
74 |
848 |
3694 |
582 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
1573 |
6947 |
254 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61008 |
11811 |
67 |
52 |
34 |
3 |
0 |
0 |
| OW |
829 |
2102 |
356 |
454 |
112 |
22 |
7 |
0 |
| VODI |
2161 |
718 |
482 |
1985 |
861 |
114 |
30 |
0 |
| ODI |
1446 |
87 |
72 |
587 |
1674 |
635 |
118 |
0 |
| CDI |
0 |
23 |
35 |
196 |
1565 |
3342 |
1308 |
63 |
| VCDI |
0 |
0 |
0 |
12 |
55 |
2117 |
6128 |
191 |
|
Date: 2025-05-21:
| 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 |
61317 |
12469 |
85 |
99 |
27 |
1 |
0 |
0 |
| OW |
837 |
1815 |
558 |
587 |
134 |
4 |
0 |
0 |
| VODI |
2221 |
218 |
338 |
1980 |
830 |
74 |
17 |
0 |
| ODI |
1375 |
20 |
40 |
381 |
2212 |
871 |
68 |
0 |
| CDI |
0 |
1 |
6 |
109 |
971 |
3600 |
1081 |
0 |
| VCDI |
0 |
0 |
6 |
3 |
38 |
1222 |
6988 |
259 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61298 |
11558 |
103 |
93 |
29 |
0 |
0 |
0 |
| OW |
852 |
2169 |
418 |
574 |
132 |
18 |
0 |
0 |
| VODI |
2206 |
679 |
400 |
1764 |
910 |
150 |
37 |
0 |
| ODI |
1394 |
102 |
74 |
504 |
1612 |
626 |
132 |
0 |
| CDI |
0 |
15 |
37 |
219 |
1480 |
3630 |
1911 |
62 |
| VCDI |
0 |
0 |
1 |
5 |
49 |
1348 |
6074 |
197 |
|
Date: 2025-05-23:
| 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 |
61533 |
12201 |
104 |
62 |
7 |
0 |
0 |
0 |
| OW |
846 |
2103 |
625 |
704 |
104 |
3 |
0 |
0 |
| VODI |
2271 |
282 |
316 |
1744 |
828 |
125 |
17 |
0 |
| ODI |
1316 |
26 |
45 |
502 |
2182 |
731 |
59 |
0 |
| CDI |
0 |
1 |
7 |
96 |
1192 |
3846 |
721 |
0 |
| VCDI |
0 |
3 |
9 |
20 |
44 |
1514 |
6230 |
443 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
61593 |
11048 |
105 |
87 |
5 |
0 |
0 |
0 |
| OW |
919 |
2453 |
470 |
676 |
149 |
10 |
7 |
0 |
| VODI |
2379 |
955 |
390 |
1489 |
811 |
186 |
46 |
0 |
| ODI |
1075 |
143 |
100 |
597 |
1646 |
549 |
146 |
0 |
| CDI |
0 |
17 |
41 |
274 |
1699 |
3986 |
1765 |
197 |
| VCDI |
0 |
0 |
0 |
5 |
47 |
1488 |
5063 |
246 |
|
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