Validation of sea ice concentration - Asian sector
Bulletin date: 2025-11-13
Data source: OSI SAF N.H. multi-product 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 |
4126 |
2134 |
109 |
204 |
28 |
0 |
0 |
0 |
| OW |
170 |
629 |
89 |
374 |
83 |
0 |
0 |
0 |
| VODI |
9 |
60 |
21 |
93 |
243 |
32 |
0 |
0 |
| ODI |
0 |
0 |
0 |
34 |
132 |
148 |
2 |
0 |
| CDI |
0 |
0 |
0 |
13 |
76 |
389 |
102 |
4 |
| VCDI |
0 |
0 |
0 |
2 |
45 |
1815 |
8665 |
13265 |
|
...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 |
2960 |
2553 |
113 |
161 |
37 |
0 |
0 |
0 |
| OW |
84 |
766 |
74 |
382 |
178 |
0 |
0 |
0 |
| VODI |
0 |
187 |
45 |
154 |
333 |
56 |
0 |
0 |
| ODI |
0 |
4 |
0 |
24 |
112 |
162 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
85 |
252 |
44 |
47 |
| VCDI |
0 |
0 |
0 |
1 |
41 |
1022 |
8318 |
14899 |
|
...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 |
2341 |
2326 |
77 |
152 |
26 |
0 |
0 |
0 |
| OW |
66 |
773 |
96 |
306 |
109 |
0 |
0 |
0 |
| VODI |
5 |
46 |
33 |
298 |
294 |
1 |
0 |
0 |
| ODI |
0 |
9 |
0 |
57 |
427 |
45 |
0 |
3 |
| CDI |
0 |
3 |
0 |
1 |
283 |
505 |
49 |
52 |
| VCDI |
0 |
0 |
0 |
0 |
34 |
1849 |
7530 |
15300 |
|
...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 |
1635 |
1700 |
30 |
24 |
3 |
0 |
0 |
0 |
| OW |
30 |
672 |
60 |
169 |
53 |
0 |
0 |
0 |
| VODI |
2 |
1054 |
57 |
438 |
325 |
14 |
0 |
0 |
| ODI |
1 |
263 |
26 |
264 |
416 |
199 |
0 |
0 |
| CDI |
5 |
0 |
0 |
24 |
154 |
617 |
37 |
9 |
| VCDI |
11 |
0 |
0 |
1 |
83 |
2098 |
5865 |
16757 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1642 |
1715 |
35 |
51 |
4 |
0 |
0 |
0 |
| OW |
23 |
607 |
51 |
127 |
29 |
0 |
0 |
0 |
| VODI |
2 |
1097 |
58 |
437 |
311 |
17 |
0 |
0 |
| ODI |
1 |
270 |
29 |
256 |
377 |
111 |
0 |
0 |
| CDI |
4 |
0 |
0 |
49 |
222 |
641 |
32 |
11 |
| VCDI |
12 |
0 |
0 |
0 |
91 |
2159 |
5870 |
16755 |
|
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 |
1987 |
2009 |
38 |
35 |
0 |
0 |
0 |
0 |
| OW |
168 |
792 |
46 |
84 |
48 |
0 |
0 |
0 |
| VODI |
160 |
467 |
94 |
228 |
220 |
54 |
0 |
0 |
| ODI |
0 |
135 |
52 |
217 |
175 |
182 |
0 |
0 |
| CDI |
0 |
7 |
4 |
115 |
346 |
364 |
40 |
7 |
| VCDI |
0 |
12 |
1 |
56 |
357 |
2579 |
6108 |
15909 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2008 |
1955 |
35 |
22 |
0 |
0 |
0 |
0 |
| OW |
161 |
799 |
42 |
83 |
6 |
0 |
0 |
0 |
| VODI |
146 |
522 |
101 |
232 |
241 |
16 |
0 |
0 |
| ODI |
0 |
127 |
51 |
214 |
147 |
154 |
0 |
0 |
| CDI |
0 |
7 |
5 |
138 |
379 |
335 |
30 |
5 |
| VCDI |
0 |
12 |
1 |
46 |
373 |
2674 |
6118 |
15911 |
|
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 |
2059 |
2730 |
24 |
2 |
0 |
0 |
0 |
0 |
| OW |
229 |
470 |
135 |
145 |
0 |
0 |
0 |
0 |
| VODI |
4 |
140 |
34 |
262 |
33 |
0 |
0 |
0 |
| ODI |
0 |
30 |
24 |
164 |
207 |
11 |
0 |
1 |
| CDI |
3 |
0 |
0 |
56 |
478 |
677 |
4 |
16 |
| VCDI |
13 |
0 |
0 |
13 |
476 |
4047 |
8468 |
12141 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1960 |
2368 |
7 |
2 |
0 |
0 |
0 |
0 |
| OW |
225 |
633 |
83 |
126 |
20 |
0 |
0 |
0 |
| VODI |
106 |
266 |
76 |
165 |
237 |
61 |
0 |
0 |
| ODI |
1 |
68 |
20 |
168 |
152 |
289 |
0 |
1 |
| CDI |
0 |
27 |
21 |
141 |
397 |
446 |
3 |
14 |
| VCDI |
16 |
8 |
10 |
40 |
388 |
3939 |
8469 |
12143 |
|
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 |
1744 |
2535 |
30 |
20 |
0 |
0 |
0 |
0 |
| OW |
122 |
550 |
75 |
147 |
5 |
0 |
0 |
0 |
| VODI |
3 |
133 |
30 |
280 |
154 |
0 |
0 |
0 |
| ODI |
1 |
66 |
17 |
102 |
243 |
23 |
0 |
0 |
| CDI |
2 |
32 |
8 |
48 |
302 |
579 |
164 |
13 |
| VCDI |
14 |
6 |
4 |
37 |
247 |
2928 |
8853 |
13579 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1558 |
2015 |
18 |
33 |
1 |
0 |
0 |
0 |
| OW |
219 |
814 |
28 |
50 |
5 |
0 |
0 |
0 |
| VODI |
92 |
382 |
81 |
263 |
165 |
39 |
0 |
0 |
| ODI |
1 |
78 |
18 |
151 |
169 |
243 |
18 |
2 |
| CDI |
2 |
20 |
14 |
77 |
364 |
525 |
217 |
7 |
| VCDI |
14 |
13 |
5 |
60 |
247 |
2723 |
8782 |
13583 |
|
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 |
1091 |
2226 |
30 |
41 |
1 |
0 |
0 |
0 |
| OW |
32 |
839 |
46 |
100 |
1 |
0 |
0 |
0 |
| VODI |
1 |
319 |
77 |
314 |
103 |
1 |
0 |
0 |
| ODI |
0 |
48 |
15 |
118 |
215 |
89 |
1 |
0 |
| CDI |
0 |
10 |
1 |
69 |
226 |
617 |
98 |
6 |
| VCDI |
0 |
13 |
0 |
99 |
129 |
1878 |
7682 |
16560 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
983 |
2219 |
19 |
44 |
1 |
0 |
0 |
0 |
| OW |
126 |
469 |
44 |
46 |
2 |
0 |
0 |
0 |
| VODI |
15 |
648 |
82 |
313 |
169 |
3 |
0 |
0 |
| ODI |
0 |
72 |
12 |
141 |
160 |
252 |
23 |
0 |
| CDI |
0 |
33 |
12 |
115 |
152 |
647 |
243 |
11 |
| VCDI |
0 |
14 |
0 |
82 |
191 |
1683 |
7515 |
16555 |
|
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