Validation of sea ice concentration - European sector
Bulletin date: 2025-05-15
Data source: OSI SAF N.H. multi-product 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 |
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 |
|
...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 |
62820 |
10992 |
103 |
108 |
17 |
0 |
0 |
0 |
| OW |
57 |
1583 |
367 |
590 |
101 |
19 |
0 |
0 |
| VODI |
0 |
217 |
256 |
1569 |
743 |
130 |
5 |
0 |
| ODI |
0 |
11 |
37 |
727 |
2177 |
552 |
16 |
0 |
| CDI |
0 |
3 |
8 |
130 |
2324 |
3631 |
1329 |
12 |
| VCDI |
0 |
0 |
0 |
28 |
273 |
1773 |
5765 |
1943 |
|
...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 |
63258 |
11299 |
85 |
49 |
4 |
0 |
0 |
0 |
| OW |
16 |
1443 |
484 |
508 |
36 |
1 |
0 |
0 |
| VODI |
0 |
75 |
175 |
2352 |
627 |
15 |
0 |
0 |
| ODI |
0 |
4 |
5 |
487 |
3357 |
254 |
0 |
0 |
| CDI |
0 |
0 |
4 |
80 |
1534 |
4093 |
379 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
1147 |
7287 |
1319 |
|
...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 |
63350 |
11184 |
64 |
80 |
10 |
0 |
0 |
0 |
| OW |
29 |
1600 |
524 |
384 |
116 |
0 |
0 |
0 |
| VODI |
0 |
192 |
371 |
2393 |
779 |
21 |
0 |
0 |
| ODI |
0 |
39 |
12 |
736 |
2639 |
310 |
2 |
0 |
| CDI |
0 |
3 |
0 |
62 |
1715 |
3955 |
968 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
1029 |
6571 |
1273 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63336 |
11199 |
68 |
84 |
15 |
0 |
0 |
0 |
| OW |
43 |
1562 |
509 |
405 |
119 |
0 |
0 |
0 |
| VODI |
0 |
213 |
382 |
2423 |
776 |
27 |
0 |
0 |
| ODI |
0 |
41 |
12 |
678 |
2641 |
296 |
2 |
0 |
| CDI |
0 |
3 |
0 |
60 |
1704 |
3992 |
1061 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
9 |
1000 |
6478 |
1273 |
|
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 |
63208 |
11250 |
74 |
110 |
3 |
0 |
0 |
0 |
| OW |
32 |
1800 |
324 |
569 |
84 |
0 |
0 |
0 |
| VODI |
0 |
332 |
368 |
2625 |
556 |
29 |
0 |
0 |
| ODI |
0 |
20 |
14 |
728 |
2510 |
366 |
8 |
0 |
| CDI |
0 |
1 |
0 |
107 |
2062 |
3543 |
1269 |
214 |
| VCDI |
0 |
0 |
0 |
3 |
35 |
1114 |
5668 |
1390 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63209 |
11262 |
82 |
133 |
10 |
0 |
0 |
0 |
| OW |
31 |
1767 |
315 |
559 |
93 |
1 |
0 |
0 |
| VODI |
0 |
350 |
370 |
2641 |
615 |
33 |
0 |
0 |
| ODI |
0 |
24 |
13 |
700 |
2384 |
384 |
7 |
0 |
| CDI |
0 |
0 |
0 |
105 |
2115 |
3642 |
1230 |
146 |
| VCDI |
0 |
0 |
0 |
4 |
33 |
992 |
5708 |
1458 |
|
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 |
63817 |
11510 |
97 |
119 |
4 |
0 |
0 |
0 |
| OW |
163 |
1636 |
664 |
530 |
8 |
0 |
0 |
0 |
| VODI |
58 |
100 |
87 |
3103 |
383 |
4 |
0 |
0 |
| ODI |
0 |
6 |
0 |
230 |
3527 |
206 |
8 |
0 |
| CDI |
0 |
0 |
0 |
15 |
1133 |
3842 |
287 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1274 |
5182 |
2422 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63720 |
10654 |
105 |
130 |
8 |
0 |
0 |
0 |
| OW |
207 |
1879 |
317 |
634 |
49 |
2 |
0 |
0 |
| VODI |
96 |
692 |
391 |
2457 |
609 |
21 |
0 |
0 |
| ODI |
15 |
27 |
34 |
603 |
2202 |
319 |
51 |
0 |
| CDI |
0 |
0 |
1 |
173 |
2124 |
3054 |
776 |
475 |
| VCDI |
0 |
0 |
0 |
0 |
64 |
1930 |
4650 |
1947 |
|
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 |
63347 |
12033 |
105 |
154 |
5 |
0 |
0 |
0 |
| OW |
1 |
1486 |
602 |
981 |
76 |
0 |
0 |
0 |
| VODI |
0 |
74 |
119 |
2620 |
699 |
3 |
0 |
0 |
| ODI |
0 |
0 |
3 |
236 |
3137 |
292 |
4 |
0 |
| CDI |
0 |
0 |
0 |
30 |
1445 |
3761 |
619 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
1075 |
5883 |
1611 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63329 |
11089 |
119 |
166 |
10 |
0 |
0 |
0 |
| OW |
19 |
1998 |
387 |
878 |
100 |
0 |
0 |
0 |
| VODI |
0 |
468 |
291 |
2360 |
858 |
30 |
2 |
0 |
| ODI |
0 |
38 |
30 |
475 |
2261 |
283 |
45 |
0 |
| CDI |
0 |
0 |
2 |
142 |
2133 |
3618 |
1252 |
296 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
1200 |
5207 |
1315 |
|
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 |
63720 |
11599 |
125 |
103 |
7 |
0 |
0 |
0 |
| OW |
1 |
1697 |
593 |
1226 |
65 |
0 |
0 |
0 |
| VODI |
0 |
79 |
146 |
2350 |
800 |
11 |
0 |
0 |
| ODI |
0 |
0 |
5 |
300 |
2976 |
334 |
4 |
0 |
| CDI |
0 |
0 |
0 |
46 |
1404 |
4071 |
416 |
1 |
| VCDI |
0 |
0 |
0 |
17 |
44 |
1262 |
3408 |
3606 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
63700 |
10461 |
122 |
118 |
8 |
0 |
0 |
0 |
| OW |
21 |
2167 |
351 |
1145 |
131 |
1 |
0 |
0 |
| VODI |
0 |
702 |
326 |
1949 |
928 |
54 |
9 |
0 |
| ODI |
0 |
45 |
67 |
606 |
2158 |
315 |
82 |
0 |
| CDI |
0 |
0 |
3 |
224 |
2049 |
3988 |
1177 |
602 |
| VCDI |
0 |
0 |
0 |
0 |
22 |
1320 |
2560 |
3005 |
|
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