Validation of sea ice concentration - Asian sector
Bulletin date: 2025-12-04
Data source: OSI SAF N.H. multi-product 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 |
366 |
1845 |
75 |
63 |
0 |
0 |
0 |
0 |
| OW |
35 |
658 |
72 |
104 |
0 |
0 |
0 |
0 |
| VODI |
2 |
475 |
139 |
404 |
65 |
0 |
0 |
0 |
| ODI |
0 |
57 |
35 |
343 |
236 |
12 |
0 |
0 |
| CDI |
0 |
0 |
6 |
62 |
329 |
138 |
15 |
4 |
| VCDI |
0 |
0 |
0 |
6 |
263 |
1515 |
6959 |
18813 |
|
...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 |
869 |
1951 |
62 |
9 |
0 |
0 |
0 |
0 |
| OW |
210 |
436 |
73 |
96 |
0 |
0 |
0 |
0 |
| VODI |
32 |
455 |
93 |
170 |
18 |
0 |
0 |
0 |
| ODI |
2 |
207 |
27 |
152 |
58 |
3 |
0 |
0 |
| CDI |
0 |
108 |
5 |
103 |
184 |
46 |
11 |
12 |
| VCDI |
0 |
141 |
56 |
196 |
479 |
2861 |
6981 |
16990 |
|
...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 |
414 |
2447 |
76 |
30 |
0 |
0 |
0 |
0 |
| OW |
10 |
363 |
157 |
231 |
2 |
0 |
0 |
0 |
| VODI |
4 |
157 |
44 |
400 |
108 |
0 |
0 |
0 |
| ODI |
0 |
138 |
9 |
105 |
224 |
2 |
0 |
0 |
| CDI |
0 |
62 |
7 |
42 |
240 |
217 |
22 |
5 |
| VCDI |
0 |
19 |
22 |
217 |
297 |
2793 |
8273 |
15959 |
|
...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 |
279 |
2092 |
52 |
13 |
0 |
0 |
0 |
0 |
| OW |
12 |
200 |
86 |
185 |
0 |
0 |
0 |
0 |
| VODI |
2 |
43 |
32 |
414 |
102 |
11 |
0 |
0 |
| ODI |
0 |
2 |
13 |
187 |
401 |
12 |
4 |
0 |
| CDI |
0 |
0 |
2 |
101 |
494 |
233 |
36 |
9 |
| VCDI |
0 |
0 |
0 |
13 |
556 |
1937 |
8445 |
17128 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
280 |
2062 |
61 |
19 |
0 |
0 |
0 |
0 |
| OW |
11 |
239 |
83 |
231 |
1 |
0 |
0 |
0 |
| VODI |
2 |
33 |
24 |
365 |
143 |
9 |
0 |
0 |
| ODI |
0 |
3 |
11 |
170 |
313 |
13 |
4 |
0 |
| CDI |
0 |
0 |
6 |
115 |
546 |
230 |
40 |
9 |
| VCDI |
0 |
0 |
0 |
13 |
550 |
1941 |
8441 |
17128 |
|
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 |
164 |
1520 |
65 |
21 |
0 |
0 |
0 |
0 |
| OW |
1 |
432 |
72 |
100 |
1 |
0 |
0 |
0 |
| VODI |
0 |
78 |
43 |
401 |
69 |
0 |
0 |
0 |
| ODI |
0 |
0 |
1 |
210 |
343 |
18 |
2 |
0 |
| CDI |
0 |
0 |
0 |
103 |
736 |
256 |
34 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
364 |
2278 |
10052 |
15730 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
164 |
1562 |
85 |
24 |
0 |
0 |
0 |
0 |
| OW |
1 |
394 |
61 |
141 |
1 |
0 |
0 |
0 |
| VODI |
0 |
72 |
35 |
374 |
112 |
0 |
0 |
0 |
| ODI |
0 |
2 |
0 |
169 |
316 |
17 |
1 |
0 |
| CDI |
0 |
0 |
0 |
108 |
695 |
316 |
44 |
0 |
| VCDI |
0 |
0 |
0 |
21 |
389 |
2219 |
10043 |
15730 |
|
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 |
157 |
1514 |
41 |
90 |
0 |
0 |
0 |
0 |
| OW |
1 |
366 |
73 |
97 |
1 |
0 |
0 |
0 |
| VODI |
0 |
92 |
75 |
288 |
21 |
0 |
0 |
0 |
| ODI |
0 |
9 |
17 |
266 |
133 |
5 |
1 |
0 |
| CDI |
0 |
7 |
0 |
199 |
346 |
361 |
25 |
0 |
| VCDI |
0 |
1 |
1 |
71 |
485 |
2091 |
13667 |
12595 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
152 |
1467 |
37 |
79 |
0 |
0 |
0 |
0 |
| OW |
6 |
415 |
78 |
101 |
0 |
0 |
0 |
0 |
| VODI |
0 |
89 |
81 |
300 |
35 |
0 |
0 |
0 |
| ODI |
0 |
8 |
10 |
299 |
197 |
37 |
2 |
0 |
| CDI |
0 |
8 |
0 |
164 |
370 |
402 |
36 |
0 |
| VCDI |
0 |
2 |
1 |
68 |
384 |
2018 |
13655 |
12595 |
|
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 |
150 |
1535 |
62 |
40 |
1 |
0 |
0 |
0 |
| OW |
8 |
283 |
79 |
99 |
12 |
0 |
0 |
0 |
| VODI |
2 |
118 |
38 |
292 |
44 |
0 |
0 |
0 |
| ODI |
0 |
5 |
1 |
111 |
194 |
1 |
0 |
0 |
| CDI |
0 |
6 |
0 |
26 |
428 |
157 |
24 |
17 |
| VCDI |
0 |
4 |
1 |
10 |
376 |
2044 |
10710 |
16218 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
145 |
1233 |
46 |
26 |
0 |
0 |
0 |
0 |
| OW |
11 |
322 |
31 |
45 |
0 |
0 |
0 |
0 |
| VODI |
4 |
345 |
84 |
171 |
36 |
0 |
0 |
0 |
| ODI |
0 |
35 |
19 |
234 |
154 |
5 |
0 |
0 |
| CDI |
0 |
16 |
1 |
93 |
452 |
152 |
46 |
14 |
| VCDI |
0 |
0 |
0 |
9 |
413 |
2045 |
10688 |
16221 |
|
Date: 2025-12-12:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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