Validation of sea ice concentration - European sector
Bulletin date: 2025-07-24
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-18:
| 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 |
78480 |
6845 |
49 |
28 |
1 |
0 |
0 |
0 |
| OW |
1672 |
1992 |
389 |
356 |
36 |
0 |
0 |
0 |
| VODI |
2494 |
262 |
381 |
1187 |
322 |
28 |
0 |
0 |
| ODI |
0 |
3 |
18 |
386 |
1038 |
232 |
18 |
0 |
| CDI |
0 |
0 |
0 |
4 |
712 |
5187 |
620 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
93 |
29 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-20:
| 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 |
79495 |
6096 |
32 |
0 |
0 |
0 |
0 |
0 |
| OW |
1698 |
1968 |
412 |
335 |
35 |
2 |
0 |
0 |
| VODI |
2463 |
309 |
363 |
1119 |
248 |
56 |
0 |
0 |
| ODI |
0 |
7 |
31 |
486 |
853 |
194 |
28 |
0 |
| CDI |
0 |
0 |
0 |
1 |
792 |
5082 |
643 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
109 |
5 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-22:
| 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 |
79949 |
6748 |
63 |
28 |
2 |
0 |
0 |
0 |
| OW |
1726 |
1436 |
530 |
440 |
19 |
0 |
0 |
0 |
| VODI |
2344 |
30 |
146 |
1194 |
325 |
8 |
0 |
0 |
| ODI |
0 |
1 |
3 |
129 |
866 |
147 |
1 |
0 |
| CDI |
0 |
0 |
0 |
1 |
875 |
4244 |
237 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
844 |
526 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-24:
| 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 |
81081 |
5549 |
55 |
18 |
2 |
0 |
0 |
0 |
| OW |
1825 |
1445 |
427 |
355 |
19 |
0 |
0 |
0 |
| VODI |
2307 |
111 |
248 |
1104 |
292 |
17 |
1 |
0 |
| ODI |
0 |
6 |
9 |
219 |
940 |
197 |
19 |
0 |
| CDI |
0 |
0 |
0 |
22 |
1290 |
3753 |
138 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1205 |
206 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81062 |
5687 |
64 |
22 |
2 |
0 |
0 |
0 |
| OW |
1839 |
1309 |
412 |
353 |
26 |
0 |
0 |
0 |
| VODI |
2312 |
101 |
253 |
1102 |
338 |
12 |
3 |
0 |
| ODI |
0 |
14 |
8 |
218 |
928 |
343 |
26 |
0 |
| CDI |
0 |
0 |
2 |
23 |
1249 |
3669 |
120 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1148 |
215 |
0 |
|
Date: 2025-07-26:
| 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 |
81904 |
5044 |
41 |
11 |
3 |
0 |
0 |
0 |
| OW |
1868 |
1245 |
303 |
381 |
27 |
2 |
0 |
0 |
| VODI |
2276 |
200 |
244 |
1039 |
306 |
21 |
0 |
0 |
| ODI |
0 |
13 |
21 |
244 |
942 |
344 |
28 |
0 |
| CDI |
0 |
0 |
1 |
26 |
1308 |
3621 |
138 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1178 |
81 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81939 |
5096 |
55 |
13 |
3 |
0 |
0 |
0 |
| OW |
1830 |
1204 |
294 |
379 |
27 |
1 |
0 |
0 |
| VODI |
2279 |
184 |
237 |
1054 |
357 |
20 |
1 |
0 |
| ODI |
0 |
18 |
20 |
231 |
851 |
462 |
40 |
0 |
| CDI |
0 |
0 |
4 |
24 |
1348 |
3517 |
123 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1166 |
83 |
0 |
|
Date: 2025-07-28:
| 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 |
80991 |
6799 |
96 |
19 |
2 |
0 |
0 |
0 |
| OW |
1925 |
936 |
489 |
322 |
14 |
0 |
0 |
0 |
| VODI |
2017 |
22 |
86 |
1143 |
260 |
3 |
0 |
0 |
| ODI |
0 |
0 |
2 |
133 |
1925 |
392 |
1 |
0 |
| CDI |
0 |
0 |
0 |
4 |
454 |
3785 |
70 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
554 |
418 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80879 |
6317 |
65 |
16 |
6 |
0 |
0 |
0 |
| OW |
1810 |
1183 |
297 |
289 |
23 |
0 |
0 |
0 |
| VODI |
2244 |
210 |
281 |
994 |
278 |
30 |
4 |
0 |
| ODI |
0 |
40 |
23 |
294 |
1096 |
765 |
55 |
0 |
| CDI |
0 |
7 |
7 |
28 |
1251 |
2904 |
143 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1035 |
287 |
0 |
|
Date: 2025-07-30:
| 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 |
82950 |
4934 |
64 |
19 |
4 |
0 |
0 |
0 |
| OW |
1957 |
1046 |
375 |
310 |
16 |
0 |
0 |
0 |
| VODI |
1981 |
58 |
166 |
998 |
270 |
6 |
0 |
0 |
| ODI |
0 |
0 |
4 |
164 |
2050 |
325 |
1 |
0 |
| CDI |
0 |
0 |
1 |
7 |
862 |
3008 |
198 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
931 |
157 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82844 |
4420 |
44 |
22 |
8 |
0 |
0 |
0 |
| OW |
1830 |
1253 |
230 |
225 |
34 |
2 |
0 |
0 |
| VODI |
2214 |
314 |
289 |
908 |
306 |
35 |
1 |
0 |
| ODI |
0 |
47 |
39 |
305 |
1582 |
609 |
52 |
0 |
| CDI |
0 |
4 |
8 |
38 |
1271 |
2390 |
177 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1234 |
126 |
0 |
|
Date: 2025-08-01:
| 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 |
83095 |
4832 |
48 |
29 |
3 |
0 |
0 |
0 |
| OW |
1979 |
1255 |
315 |
246 |
12 |
0 |
0 |
0 |
| VODI |
1947 |
226 |
281 |
764 |
166 |
2 |
1 |
0 |
| ODI |
0 |
3 |
20 |
192 |
1976 |
259 |
2 |
0 |
| CDI |
0 |
0 |
3 |
15 |
853 |
2774 |
396 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
973 |
195 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
83051 |
4451 |
61 |
53 |
8 |
0 |
0 |
0 |
| OW |
1924 |
1222 |
182 |
181 |
61 |
6 |
0 |
0 |
| VODI |
2046 |
544 |
346 |
669 |
169 |
25 |
5 |
0 |
| ODI |
0 |
87 |
67 |
285 |
1392 |
1006 |
95 |
0 |
| CDI |
0 |
12 |
11 |
58 |
1379 |
1884 |
198 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1087 |
296 |
0 |
|
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