Validation of sea ice concentration - Asian sector
Bulletin date: 2025-11-13
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-07:
| 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 |
2541 |
3442 |
116 |
157 |
24 |
0 |
0 |
0 |
| OW |
99 |
713 |
71 |
318 |
94 |
0 |
0 |
0 |
| VODI |
0 |
89 |
18 |
64 |
216 |
39 |
0 |
0 |
| ODI |
0 |
4 |
6 |
22 |
89 |
179 |
2 |
0 |
| CDI |
0 |
2 |
1 |
10 |
47 |
393 |
96 |
0 |
| VCDI |
0 |
1 |
2 |
6 |
16 |
1312 |
12077 |
9816 |
|
...date precedes bulletin
|
Date: 2025-11-09:
| 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 |
2030 |
3171 |
122 |
156 |
56 |
0 |
0 |
0 |
| OW |
68 |
822 |
96 |
244 |
200 |
6 |
0 |
0 |
| VODI |
0 |
203 |
44 |
131 |
264 |
83 |
0 |
0 |
| ODI |
0 |
1 |
1 |
19 |
96 |
142 |
23 |
0 |
| CDI |
0 |
0 |
0 |
7 |
48 |
226 |
134 |
26 |
| VCDI |
0 |
0 |
0 |
3 |
13 |
980 |
10799 |
11868 |
|
...date precedes bulletin
|
Date: 2025-11-11:
| 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 |
2053 |
2373 |
75 |
121 |
21 |
11 |
0 |
0 |
| OW |
21 |
897 |
75 |
224 |
107 |
4 |
0 |
0 |
| VODI |
1 |
88 |
65 |
233 |
254 |
9 |
0 |
0 |
| ODI |
0 |
0 |
5 |
72 |
338 |
92 |
0 |
6 |
| CDI |
0 |
0 |
0 |
4 |
225 |
501 |
73 |
52 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1735 |
10088 |
12256 |
|
...date precedes bulletin
|
Date: 2025-11-13:
| 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 |
546 |
2530 |
54 |
21 |
4 |
0 |
0 |
0 |
| OW |
2 |
692 |
68 |
158 |
45 |
3 |
0 |
0 |
| VODI |
0 |
1068 |
114 |
345 |
305 |
16 |
0 |
0 |
| ODI |
0 |
254 |
72 |
245 |
309 |
252 |
5 |
0 |
| CDI |
0 |
2 |
7 |
32 |
107 |
564 |
68 |
23 |
| VCDI |
0 |
0 |
1 |
6 |
38 |
2005 |
7339 |
14782 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
547 |
2558 |
65 |
34 |
4 |
0 |
0 |
0 |
| OW |
1 |
619 |
53 |
120 |
28 |
3 |
0 |
0 |
| VODI |
0 |
1102 |
114 |
352 |
301 |
16 |
0 |
0 |
| ODI |
0 |
265 |
76 |
228 |
263 |
170 |
5 |
0 |
| CDI |
0 |
2 |
8 |
66 |
166 |
601 |
54 |
18 |
| VCDI |
0 |
0 |
0 |
7 |
46 |
2050 |
7353 |
14787 |
|
Date: 2025-11-15:
| 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 |
1934 |
1836 |
43 |
15 |
0 |
0 |
0 |
0 |
| OW |
148 |
839 |
30 |
58 |
35 |
2 |
0 |
0 |
| VODI |
135 |
612 |
77 |
97 |
193 |
83 |
0 |
0 |
| ODI |
0 |
207 |
58 |
132 |
163 |
172 |
0 |
0 |
| CDI |
0 |
21 |
20 |
104 |
285 |
354 |
56 |
13 |
| VCDI |
0 |
8 |
15 |
62 |
275 |
2746 |
7920 |
13334 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1954 |
1775 |
40 |
6 |
0 |
0 |
0 |
0 |
| OW |
143 |
844 |
28 |
54 |
1 |
0 |
0 |
0 |
| VODI |
120 |
675 |
79 |
100 |
217 |
45 |
0 |
0 |
| ODI |
0 |
197 |
57 |
126 |
135 |
146 |
0 |
0 |
| CDI |
0 |
25 |
25 |
128 |
308 |
326 |
47 |
7 |
| VCDI |
0 |
7 |
14 |
54 |
290 |
2840 |
7929 |
13340 |
|
Date: 2025-11-17:
| 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 |
1932 |
2634 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
216 |
649 |
63 |
17 |
0 |
0 |
0 |
0 |
| VODI |
0 |
194 |
60 |
153 |
40 |
0 |
0 |
0 |
| ODI |
0 |
36 |
42 |
157 |
180 |
13 |
0 |
0 |
| CDI |
0 |
6 |
8 |
74 |
444 |
638 |
20 |
25 |
| VCDI |
0 |
9 |
1 |
33 |
413 |
4096 |
9922 |
10005 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1814 |
2278 |
6 |
0 |
0 |
0 |
0 |
0 |
| OW |
239 |
679 |
51 |
63 |
27 |
1 |
0 |
0 |
| VODI |
95 |
398 |
45 |
50 |
220 |
79 |
0 |
0 |
| ODI |
0 |
111 |
37 |
97 |
143 |
255 |
9 |
0 |
| CDI |
0 |
32 |
25 |
177 |
351 |
405 |
15 |
17 |
| VCDI |
0 |
30 |
12 |
47 |
336 |
4007 |
9918 |
10013 |
|
Date: 2025-11-19:
| 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 |
1295 |
2741 |
35 |
24 |
3 |
0 |
0 |
0 |
| OW |
107 |
579 |
82 |
83 |
18 |
0 |
0 |
0 |
| VODI |
0 |
165 |
65 |
185 |
128 |
16 |
0 |
0 |
| ODI |
0 |
92 |
22 |
67 |
179 |
81 |
1 |
0 |
| CDI |
0 |
51 |
7 |
50 |
172 |
620 |
217 |
0 |
| VCDI |
0 |
16 |
9 |
31 |
161 |
3394 |
11948 |
9438 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1158 |
2161 |
34 |
30 |
10 |
0 |
0 |
0 |
| OW |
164 |
823 |
35 |
41 |
25 |
0 |
0 |
0 |
| VODI |
80 |
496 |
83 |
142 |
117 |
78 |
0 |
0 |
| ODI |
0 |
97 |
37 |
119 |
110 |
280 |
13 |
0 |
| CDI |
0 |
45 |
21 |
56 |
250 |
543 |
264 |
0 |
| VCDI |
0 |
22 |
10 |
52 |
149 |
3210 |
11889 |
9438 |
|
Date: 2025-11-21:
| 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 |
718 |
2401 |
24 |
33 |
2 |
0 |
0 |
0 |
| OW |
4 |
862 |
61 |
47 |
11 |
0 |
0 |
0 |
| VODI |
0 |
300 |
121 |
224 |
134 |
12 |
0 |
0 |
| ODI |
0 |
26 |
23 |
111 |
189 |
109 |
3 |
0 |
| CDI |
0 |
8 |
5 |
59 |
206 |
579 |
133 |
0 |
| VCDI |
0 |
20 |
26 |
72 |
115 |
2030 |
10289 |
13125 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
690 |
2302 |
26 |
27 |
5 |
0 |
0 |
0 |
| OW |
31 |
549 |
38 |
40 |
6 |
1 |
0 |
0 |
| VODI |
1 |
668 |
137 |
217 |
156 |
20 |
0 |
0 |
| ODI |
0 |
60 |
22 |
91 |
163 |
260 |
38 |
0 |
| CDI |
0 |
24 |
27 |
97 |
154 |
605 |
253 |
7 |
| VCDI |
0 |
14 |
10 |
74 |
173 |
1844 |
10134 |
13118 |
|
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