Validation of sea ice concentration - European sector
Bulletin date: 2025-07-17
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-11:
| 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 |
79313 |
7054 |
16 |
59 |
11 |
0 |
0 |
0 |
| OW |
85 |
1592 |
212 |
505 |
14 |
0 |
0 |
0 |
| VODI |
0 |
267 |
218 |
1500 |
220 |
10 |
0 |
0 |
| ODI |
0 |
0 |
2 |
429 |
1358 |
59 |
17 |
0 |
| CDI |
0 |
0 |
0 |
13 |
1411 |
2469 |
368 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
2440 |
769 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-13:
| 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 |
80280 |
5785 |
33 |
29 |
0 |
0 |
0 |
0 |
| OW |
189 |
1736 |
306 |
376 |
14 |
1 |
0 |
0 |
| VODI |
1 |
505 |
323 |
1361 |
238 |
22 |
4 |
0 |
| ODI |
0 |
1 |
22 |
803 |
1036 |
114 |
39 |
0 |
| CDI |
0 |
0 |
0 |
114 |
1679 |
4305 |
173 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
48 |
813 |
66 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-15:
| 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 |
80634 |
5964 |
49 |
59 |
1 |
0 |
0 |
0 |
| OW |
170 |
1770 |
417 |
683 |
13 |
0 |
0 |
0 |
| VODI |
0 |
157 |
161 |
1606 |
263 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
381 |
1485 |
29 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
856 |
5440 |
86 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
21 |
112 |
58 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-17:
| 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 |
80805 |
5864 |
23 |
51 |
0 |
0 |
0 |
0 |
| OW |
155 |
1881 |
379 |
547 |
12 |
0 |
0 |
0 |
| VODI |
0 |
222 |
198 |
1588 |
296 |
4 |
0 |
0 |
| ODI |
0 |
0 |
6 |
385 |
1305 |
54 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
869 |
5054 |
563 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
98 |
57 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80812 |
6133 |
23 |
55 |
0 |
0 |
0 |
0 |
| OW |
148 |
1632 |
393 |
575 |
11 |
0 |
0 |
0 |
| VODI |
0 |
202 |
184 |
1542 |
301 |
6 |
0 |
0 |
| ODI |
0 |
0 |
6 |
398 |
1284 |
83 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
886 |
4979 |
535 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
142 |
85 |
0 |
|
Date: 2025-07-19:
| 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 |
81945 |
4959 |
9 |
10 |
0 |
0 |
0 |
0 |
| OW |
419 |
1779 |
289 |
392 |
12 |
0 |
0 |
0 |
| VODI |
29 |
231 |
236 |
1455 |
252 |
6 |
0 |
0 |
| ODI |
0 |
0 |
1 |
560 |
1028 |
116 |
0 |
0 |
| CDI |
0 |
0 |
0 |
11 |
749 |
5245 |
516 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
166 |
1 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81956 |
5165 |
7 |
7 |
0 |
0 |
0 |
0 |
| OW |
383 |
1633 |
298 |
417 |
10 |
0 |
0 |
0 |
| VODI |
54 |
170 |
225 |
1371 |
268 |
16 |
0 |
0 |
| ODI |
0 |
1 |
5 |
610 |
1004 |
192 |
0 |
0 |
| CDI |
0 |
0 |
0 |
23 |
759 |
5104 |
510 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
221 |
7 |
0 |
|
Date: 2025-07-21:
| 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 |
83262 |
4875 |
38 |
19 |
0 |
0 |
0 |
0 |
| OW |
122 |
1363 |
408 |
669 |
1 |
0 |
0 |
0 |
| VODI |
0 |
5 |
41 |
1472 |
244 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
71 |
1017 |
19 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
660 |
4663 |
146 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
177 |
1143 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83051 |
4356 |
15 |
13 |
0 |
0 |
0 |
0 |
| OW |
311 |
1679 |
277 |
399 |
18 |
0 |
0 |
0 |
| VODI |
22 |
207 |
189 |
1345 |
291 |
5 |
0 |
0 |
| ODI |
0 |
1 |
6 |
457 |
957 |
292 |
5 |
0 |
| CDI |
0 |
0 |
0 |
17 |
656 |
4502 |
1274 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
61 |
10 |
0 |
|
Date: 2025-07-23:
| 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 |
82994 |
5125 |
25 |
27 |
0 |
0 |
0 |
0 |
| OW |
78 |
1433 |
368 |
574 |
6 |
0 |
0 |
0 |
| VODI |
0 |
10 |
63 |
1482 |
210 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
174 |
1002 |
101 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
768 |
4477 |
93 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1038 |
367 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82857 |
4461 |
38 |
32 |
0 |
0 |
0 |
0 |
| OW |
215 |
1824 |
245 |
406 |
15 |
0 |
0 |
0 |
| VODI |
0 |
282 |
167 |
1298 |
291 |
15 |
0 |
0 |
| ODI |
0 |
1 |
6 |
505 |
934 |
509 |
27 |
0 |
| CDI |
0 |
0 |
0 |
16 |
746 |
5036 |
401 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
57 |
32 |
0 |
|
Date: 2025-07-25:
| 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 |
83796 |
4429 |
16 |
17 |
0 |
0 |
0 |
0 |
| OW |
93 |
1485 |
276 |
425 |
9 |
0 |
0 |
0 |
| VODI |
0 |
86 |
170 |
1407 |
152 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
263 |
1073 |
202 |
4 |
0 |
| CDI |
0 |
0 |
0 |
2 |
981 |
4095 |
91 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1219 |
124 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83549 |
3859 |
51 |
76 |
2 |
0 |
0 |
0 |
| OW |
340 |
1646 |
174 |
428 |
24 |
1 |
0 |
0 |
| VODI |
0 |
465 |
191 |
1074 |
384 |
37 |
2 |
0 |
| ODI |
0 |
30 |
46 |
521 |
1121 |
440 |
7 |
0 |
| CDI |
0 |
0 |
0 |
15 |
684 |
4901 |
210 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
138 |
0 |
0 |
|
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