Validation of sea ice concentration - Asian sector
Bulletin date: 2025-12-04
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-28:
| 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 |
147 |
2011 |
12 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
759 |
64 |
21 |
0 |
0 |
0 |
0 |
| VODI |
0 |
637 |
148 |
194 |
71 |
7 |
0 |
0 |
| ODI |
0 |
97 |
89 |
232 |
207 |
29 |
0 |
0 |
| CDI |
0 |
11 |
14 |
68 |
251 |
163 |
13 |
5 |
| VCDI |
0 |
2 |
8 |
53 |
265 |
1751 |
10152 |
14600 |
|
...date precedes bulletin
|
Date: 2025-11-30:
| 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 |
561 |
2148 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
14 |
678 |
59 |
33 |
1 |
0 |
0 |
0 |
| VODI |
0 |
546 |
56 |
129 |
15 |
3 |
0 |
0 |
| ODI |
0 |
222 |
49 |
97 |
45 |
6 |
1 |
0 |
| CDI |
0 |
104 |
20 |
90 |
122 |
72 |
16 |
1 |
| VCDI |
0 |
196 |
72 |
166 |
356 |
2890 |
8790 |
14523 |
|
...date precedes bulletin
|
Date: 2025-12-02:
| 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 |
187 |
2561 |
22 |
11 |
0 |
0 |
0 |
0 |
| OW |
0 |
590 |
76 |
60 |
12 |
0 |
0 |
0 |
| VODI |
0 |
215 |
115 |
223 |
138 |
1 |
0 |
0 |
| ODI |
0 |
135 |
7 |
97 |
191 |
21 |
0 |
0 |
| CDI |
0 |
55 |
14 |
23 |
198 |
229 |
48 |
1 |
| VCDI |
0 |
61 |
40 |
160 |
236 |
2690 |
10906 |
12759 |
|
...date precedes bulletin
|
Date: 2025-12-04:
| 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 |
47 |
2133 |
49 |
22 |
1 |
0 |
0 |
0 |
| OW |
0 |
292 |
82 |
89 |
5 |
0 |
0 |
0 |
| VODI |
0 |
96 |
86 |
276 |
120 |
12 |
0 |
0 |
| ODI |
0 |
21 |
22 |
162 |
350 |
34 |
4 |
0 |
| CDI |
0 |
0 |
10 |
59 |
398 |
335 |
58 |
0 |
| VCDI |
0 |
0 |
0 |
38 |
488 |
1892 |
10135 |
14766 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
47 |
2102 |
56 |
33 |
0 |
0 |
0 |
0 |
| OW |
0 |
330 |
86 |
117 |
19 |
0 |
0 |
0 |
| VODI |
0 |
84 |
70 |
249 |
149 |
10 |
0 |
0 |
| ODI |
0 |
23 |
26 |
125 |
277 |
31 |
6 |
0 |
| CDI |
0 |
3 |
11 |
81 |
444 |
329 |
62 |
0 |
| VCDI |
0 |
0 |
0 |
41 |
473 |
1903 |
10129 |
14766 |
|
Date: 2025-12-06:
| 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 |
14 |
1530 |
25 |
13 |
2 |
0 |
0 |
0 |
| OW |
0 |
501 |
44 |
49 |
4 |
0 |
0 |
0 |
| VODI |
0 |
202 |
101 |
199 |
84 |
1 |
0 |
0 |
| ODI |
0 |
25 |
28 |
180 |
275 |
62 |
1 |
0 |
| CDI |
0 |
4 |
21 |
92 |
493 |
423 |
30 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
358 |
2204 |
14401 |
10712 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14 |
1576 |
36 |
18 |
3 |
0 |
0 |
0 |
| OW |
0 |
472 |
46 |
72 |
3 |
0 |
0 |
0 |
| VODI |
0 |
183 |
84 |
180 |
144 |
0 |
0 |
0 |
| ODI |
0 |
25 |
27 |
161 |
229 |
59 |
1 |
0 |
| CDI |
0 |
6 |
20 |
85 |
470 |
474 |
40 |
0 |
| VCDI |
0 |
0 |
6 |
21 |
367 |
2157 |
14391 |
10712 |
|
Date: 2025-12-08:
| 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 |
8 |
1582 |
21 |
5 |
0 |
0 |
0 |
0 |
| OW |
0 |
455 |
37 |
41 |
2 |
0 |
0 |
0 |
| VODI |
0 |
247 |
64 |
113 |
41 |
0 |
0 |
0 |
| ODI |
0 |
88 |
57 |
128 |
115 |
20 |
2 |
0 |
| CDI |
0 |
25 |
52 |
139 |
240 |
410 |
42 |
0 |
| VCDI |
0 |
13 |
24 |
85 |
265 |
2422 |
13745 |
11594 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
8 |
1522 |
18 |
6 |
0 |
0 |
0 |
0 |
| OW |
0 |
522 |
32 |
37 |
4 |
0 |
0 |
0 |
| VODI |
0 |
239 |
77 |
121 |
55 |
0 |
0 |
0 |
| ODI |
0 |
93 |
63 |
138 |
146 |
86 |
2 |
0 |
| CDI |
0 |
24 |
39 |
131 |
254 |
445 |
61 |
0 |
| VCDI |
0 |
10 |
26 |
78 |
204 |
2321 |
13726 |
11594 |
|
Date: 2025-12-10:
| 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 |
1 |
1572 |
20 |
14 |
1 |
0 |
0 |
0 |
| OW |
0 |
371 |
37 |
49 |
10 |
0 |
0 |
0 |
| VODI |
0 |
183 |
68 |
167 |
59 |
11 |
0 |
0 |
| ODI |
0 |
3 |
9 |
115 |
148 |
30 |
0 |
0 |
| CDI |
0 |
0 |
1 |
81 |
256 |
224 |
73 |
0 |
| VCDI |
0 |
0 |
1 |
18 |
259 |
2096 |
13405 |
12800 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1 |
1263 |
8 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
352 |
17 |
25 |
0 |
0 |
0 |
0 |
| VODI |
0 |
443 |
47 |
97 |
46 |
1 |
0 |
0 |
| ODI |
0 |
69 |
53 |
146 |
140 |
35 |
0 |
0 |
| CDI |
0 |
2 |
10 |
118 |
282 |
238 |
74 |
0 |
| VCDI |
0 |
0 |
1 |
56 |
265 |
2087 |
13404 |
12800 |
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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