Validation of sea ice concentration - Asian sector
Bulletin date: 2025-11-06
Data source: OSI SAF N.H. multi-product 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 |
5295 |
2442 |
68 |
219 |
35 |
4 |
0 |
0 |
| OW |
67 |
208 |
23 |
210 |
68 |
26 |
0 |
0 |
| VODI |
0 |
2 |
2 |
328 |
333 |
251 |
93 |
0 |
| ODI |
0 |
0 |
0 |
27 |
186 |
1107 |
342 |
0 |
| CDI |
0 |
0 |
0 |
5 |
90 |
904 |
673 |
30 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
4120 |
8416 |
7518 |
|
...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 |
5168 |
2398 |
72 |
117 |
13 |
0 |
0 |
0 |
| OW |
77 |
269 |
29 |
157 |
87 |
0 |
0 |
0 |
| VODI |
5 |
87 |
0 |
117 |
256 |
37 |
7 |
0 |
| ODI |
0 |
0 |
0 |
13 |
333 |
400 |
322 |
3 |
| CDI |
0 |
0 |
0 |
0 |
170 |
660 |
1142 |
27 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
1688 |
8280 |
11139 |
|
...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 |
5359 |
2486 |
112 |
91 |
2 |
0 |
0 |
0 |
| OW |
54 |
109 |
39 |
240 |
64 |
0 |
0 |
0 |
| VODI |
0 |
3 |
4 |
100 |
157 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
23 |
202 |
106 |
2 |
0 |
| CDI |
0 |
0 |
0 |
4 |
239 |
596 |
200 |
35 |
| VCDI |
0 |
0 |
0 |
0 |
63 |
4056 |
6662 |
12088 |
|
...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 |
4867 |
2305 |
131 |
203 |
2 |
0 |
0 |
0 |
| OW |
42 |
361 |
34 |
238 |
52 |
0 |
0 |
0 |
| VODI |
1 |
8 |
8 |
73 |
229 |
45 |
0 |
0 |
| ODI |
0 |
0 |
0 |
19 |
145 |
77 |
1 |
1 |
| CDI |
0 |
0 |
0 |
0 |
81 |
502 |
72 |
26 |
| VCDI |
0 |
0 |
0 |
0 |
26 |
1997 |
9198 |
12352 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
4865 |
2336 |
145 |
251 |
1 |
0 |
0 |
0 |
| OW |
44 |
334 |
22 |
221 |
75 |
0 |
0 |
0 |
| VODI |
1 |
4 |
6 |
45 |
213 |
38 |
0 |
0 |
| ODI |
0 |
0 |
0 |
16 |
146 |
78 |
1 |
1 |
| CDI |
0 |
0 |
0 |
0 |
72 |
442 |
52 |
21 |
| VCDI |
0 |
0 |
0 |
0 |
28 |
2063 |
9218 |
12357 |
|
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 |
2372 |
3291 |
56 |
281 |
54 |
0 |
0 |
0 |
| OW |
93 |
847 |
87 |
372 |
167 |
1 |
0 |
0 |
| VODI |
0 |
134 |
17 |
130 |
268 |
43 |
0 |
0 |
| ODI |
0 |
0 |
0 |
13 |
129 |
213 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
42 |
408 |
110 |
8 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
864 |
9025 |
14058 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2361 |
3290 |
73 |
328 |
93 |
0 |
0 |
0 |
| OW |
104 |
890 |
74 |
330 |
153 |
1 |
0 |
0 |
| VODI |
0 |
92 |
13 |
132 |
265 |
49 |
0 |
0 |
| ODI |
0 |
0 |
0 |
6 |
120 |
215 |
1 |
0 |
| CDI |
0 |
0 |
0 |
0 |
30 |
347 |
68 |
14 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
917 |
9067 |
14052 |
|
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 |
2395 |
2739 |
134 |
327 |
28 |
0 |
0 |
0 |
| OW |
68 |
490 |
89 |
322 |
47 |
0 |
0 |
0 |
| VODI |
4 |
29 |
2 |
284 |
290 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
46 |
468 |
14 |
0 |
1 |
| CDI |
0 |
0 |
0 |
4 |
276 |
313 |
4 |
36 |
| VCDI |
0 |
0 |
0 |
0 |
87 |
1699 |
6796 |
16104 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2342 |
2580 |
130 |
371 |
116 |
0 |
0 |
0 |
| OW |
107 |
438 |
62 |
366 |
288 |
7 |
0 |
0 |
| VODI |
18 |
235 |
33 |
201 |
516 |
89 |
0 |
0 |
| ODI |
0 |
5 |
0 |
43 |
140 |
173 |
1 |
0 |
| CDI |
0 |
0 |
0 |
2 |
103 |
231 |
45 |
33 |
| VCDI |
0 |
0 |
0 |
0 |
33 |
1526 |
6754 |
16108 |
|
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 |
1320 |
2203 |
58 |
77 |
7 |
0 |
0 |
0 |
| OW |
23 |
874 |
75 |
229 |
132 |
0 |
0 |
0 |
| VODI |
0 |
826 |
101 |
501 |
310 |
23 |
0 |
0 |
| ODI |
0 |
14 |
4 |
169 |
370 |
99 |
0 |
0 |
| CDI |
0 |
14 |
0 |
6 |
252 |
586 |
27 |
39 |
| VCDI |
0 |
0 |
0 |
1 |
49 |
2055 |
6172 |
16480 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1340 |
2220 |
61 |
147 |
72 |
5 |
0 |
0 |
| OW |
3 |
812 |
69 |
257 |
255 |
61 |
0 |
0 |
| VODI |
0 |
789 |
91 |
353 |
384 |
185 |
0 |
0 |
| ODI |
0 |
97 |
17 |
218 |
324 |
230 |
15 |
0 |
| CDI |
0 |
13 |
0 |
8 |
68 |
399 |
98 |
41 |
| VCDI |
0 |
0 |
0 |
0 |
17 |
1883 |
6086 |
16478 |
|
Date: 2025-11-14:
| 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 |
1957 |
1561 |
30 |
66 |
0 |
0 |
0 |
0 |
| OW |
176 |
688 |
63 |
69 |
75 |
0 |
0 |
0 |
| VODI |
39 |
902 |
105 |
292 |
261 |
51 |
0 |
0 |
| ODI |
2 |
250 |
37 |
251 |
275 |
206 |
0 |
0 |
| CDI |
0 |
4 |
0 |
66 |
258 |
451 |
29 |
8 |
| VCDI |
0 |
12 |
0 |
12 |
147 |
2439 |
5783 |
16531 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1838 |
1509 |
42 |
84 |
43 |
9 |
0 |
0 |
| OW |
172 |
691 |
59 |
110 |
108 |
101 |
0 |
0 |
| VODI |
132 |
873 |
104 |
418 |
435 |
172 |
0 |
0 |
| ODI |
32 |
319 |
30 |
127 |
263 |
277 |
5 |
0 |
| CDI |
0 |
14 |
0 |
15 |
95 |
308 |
78 |
3 |
| VCDI |
0 |
11 |
0 |
2 |
72 |
2280 |
5729 |
16536 |
|
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