Validation of sea ice concentration - Asian sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-10-31:
| 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 |
4842 |
2526 |
113 |
158 |
31 |
3 |
0 |
0 |
| OW |
47 |
235 |
44 |
146 |
46 |
28 |
1 |
0 |
| VODI |
0 |
55 |
76 |
214 |
244 |
274 |
109 |
0 |
| ODI |
0 |
10 |
7 |
22 |
154 |
1066 |
378 |
0 |
| CDI |
0 |
0 |
0 |
2 |
64 |
859 |
734 |
11 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
3009 |
11634 |
4936 |
|
...date precedes bulletin
|
Date: 2025-11-02:
| 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 |
4959 |
2320 |
51 |
60 |
8 |
0 |
0 |
0 |
| OW |
56 |
300 |
59 |
93 |
67 |
4 |
0 |
0 |
| VODI |
4 |
80 |
41 |
95 |
210 |
27 |
7 |
0 |
| ODI |
0 |
0 |
2 |
32 |
295 |
378 |
345 |
5 |
| CDI |
0 |
0 |
0 |
2 |
178 |
609 |
1164 |
9 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
1712 |
10783 |
8109 |
|
...date precedes bulletin
|
Date: 2025-11-04:
| 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 |
5311 |
2248 |
61 |
44 |
1 |
0 |
0 |
0 |
| OW |
47 |
177 |
74 |
129 |
56 |
0 |
0 |
0 |
| VODI |
0 |
4 |
17 |
86 |
117 |
13 |
0 |
0 |
| ODI |
0 |
0 |
2 |
13 |
169 |
113 |
4 |
0 |
| CDI |
0 |
0 |
0 |
5 |
242 |
552 |
217 |
19 |
| VCDI |
0 |
0 |
0 |
1 |
46 |
3486 |
12383 |
6445 |
|
...date precedes bulletin
|
Date: 2025-11-06:
| 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 |
4399 |
2429 |
153 |
177 |
11 |
0 |
0 |
0 |
| OW |
37 |
334 |
57 |
162 |
79 |
0 |
0 |
0 |
| VODI |
0 |
18 |
13 |
60 |
196 |
66 |
0 |
0 |
| ODI |
0 |
1 |
4 |
19 |
95 |
99 |
0 |
2 |
| CDI |
0 |
2 |
1 |
8 |
59 |
478 |
73 |
32 |
| VCDI |
0 |
0 |
0 |
4 |
23 |
1710 |
11341 |
9940 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4399 |
2453 |
171 |
217 |
14 |
0 |
0 |
0 |
| OW |
37 |
319 |
40 |
145 |
99 |
0 |
0 |
0 |
| VODI |
0 |
10 |
12 |
40 |
180 |
56 |
0 |
0 |
| ODI |
0 |
1 |
4 |
16 |
89 |
104 |
0 |
2 |
| CDI |
0 |
1 |
1 |
7 |
57 |
428 |
45 |
29 |
| VCDI |
0 |
0 |
0 |
5 |
24 |
1765 |
11369 |
9943 |
|
Date: 2025-11-08:
| 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 |
2167 |
3165 |
142 |
211 |
76 |
0 |
0 |
0 |
| OW |
94 |
882 |
90 |
296 |
142 |
3 |
0 |
0 |
| VODI |
0 |
136 |
29 |
102 |
212 |
71 |
0 |
0 |
| ODI |
0 |
1 |
1 |
15 |
82 |
233 |
9 |
0 |
| CDI |
0 |
0 |
2 |
5 |
20 |
351 |
160 |
9 |
| VCDI |
0 |
0 |
0 |
3 |
8 |
675 |
11162 |
11528 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2155 |
3249 |
126 |
207 |
114 |
0 |
0 |
0 |
| OW |
106 |
843 |
113 |
293 |
128 |
7 |
0 |
0 |
| VODI |
0 |
91 |
23 |
117 |
200 |
77 |
0 |
0 |
| ODI |
0 |
1 |
1 |
9 |
71 |
236 |
9 |
0 |
| CDI |
0 |
0 |
1 |
4 |
19 |
272 |
136 |
7 |
| VCDI |
0 |
0 |
0 |
2 |
8 |
741 |
11186 |
11530 |
|
Date: 2025-11-10:
| 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 |
1763 |
3102 |
143 |
310 |
97 |
4 |
0 |
0 |
| OW |
65 |
447 |
66 |
250 |
249 |
8 |
0 |
0 |
| VODI |
1 |
244 |
43 |
108 |
329 |
66 |
0 |
0 |
| ODI |
0 |
27 |
16 |
58 |
220 |
130 |
6 |
0 |
| CDI |
0 |
0 |
0 |
6 |
99 |
224 |
52 |
32 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
1407 |
10449 |
12057 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1755 |
3014 |
111 |
268 |
102 |
9 |
0 |
0 |
| OW |
72 |
532 |
89 |
284 |
250 |
2 |
0 |
0 |
| VODI |
2 |
267 |
61 |
133 |
455 |
110 |
0 |
0 |
| ODI |
0 |
7 |
7 |
40 |
111 |
162 |
16 |
0 |
| CDI |
0 |
0 |
0 |
7 |
73 |
180 |
100 |
35 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
1376 |
10391 |
12054 |
|
Date: 2025-11-12:
| 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 |
766 |
2549 |
77 |
45 |
4 |
3 |
0 |
0 |
| OW |
0 |
863 |
47 |
162 |
111 |
13 |
0 |
0 |
| VODI |
0 |
931 |
126 |
330 |
302 |
33 |
0 |
0 |
| ODI |
0 |
40 |
23 |
158 |
289 |
138 |
0 |
0 |
| CDI |
0 |
1 |
1 |
20 |
216 |
558 |
53 |
53 |
| VCDI |
0 |
0 |
0 |
1 |
40 |
1880 |
9323 |
12926 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
766 |
2600 |
72 |
105 |
43 |
11 |
0 |
0 |
| OW |
0 |
841 |
80 |
177 |
273 |
58 |
0 |
0 |
| VODI |
0 |
828 |
85 |
245 |
349 |
228 |
2 |
0 |
| ODI |
0 |
115 |
37 |
173 |
248 |
271 |
23 |
3 |
| CDI |
0 |
0 |
0 |
16 |
44 |
367 |
122 |
37 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
1690 |
9229 |
12939 |
|
Date: 2025-11-14:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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