Validation of sea ice concentration - Asian sector
Bulletin date: 2025-07-10
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-04:
| 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 |
1340 |
3697 |
36 |
46 |
29 |
6 |
0 |
0 |
| OW |
17 |
1457 |
201 |
172 |
59 |
43 |
0 |
0 |
| VODI |
0 |
299 |
241 |
699 |
400 |
89 |
7 |
0 |
| ODI |
0 |
40 |
25 |
421 |
1808 |
712 |
18 |
0 |
| CDI |
0 |
14 |
26 |
196 |
2214 |
6145 |
744 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
38 |
2704 |
8136 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-06:
| 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 |
1141 |
4036 |
55 |
46 |
30 |
13 |
2 |
0 |
| OW |
87 |
1395 |
166 |
134 |
59 |
46 |
4 |
0 |
| VODI |
0 |
369 |
251 |
687 |
411 |
135 |
10 |
0 |
| ODI |
0 |
47 |
57 |
459 |
1940 |
707 |
7 |
0 |
| CDI |
0 |
42 |
27 |
244 |
2242 |
6524 |
646 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
26 |
2623 |
7227 |
186 |
|
...date precedes bulletin
|
Date: 2025-07-08:
| 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 |
1391 |
4852 |
53 |
50 |
16 |
0 |
0 |
0 |
| OW |
30 |
1179 |
323 |
225 |
52 |
15 |
3 |
0 |
| VODI |
0 |
82 |
199 |
1056 |
414 |
24 |
2 |
0 |
| ODI |
0 |
22 |
15 |
324 |
1986 |
424 |
1 |
0 |
| CDI |
0 |
1 |
5 |
91 |
2017 |
7697 |
247 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
24 |
5832 |
3430 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-10:
| 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 |
1493 |
5086 |
66 |
53 |
12 |
0 |
0 |
0 |
| OW |
3 |
1139 |
220 |
228 |
92 |
6 |
0 |
0 |
| VODI |
0 |
303 |
231 |
944 |
524 |
26 |
0 |
0 |
| ODI |
0 |
77 |
47 |
409 |
1371 |
496 |
0 |
0 |
| CDI |
0 |
46 |
38 |
158 |
4354 |
6129 |
20 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
4005 |
4417 |
84 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1496 |
5150 |
67 |
56 |
13 |
0 |
0 |
0 |
| OW |
0 |
1081 |
214 |
225 |
85 |
7 |
0 |
0 |
| VODI |
0 |
286 |
242 |
916 |
505 |
28 |
0 |
0 |
| ODI |
0 |
86 |
40 |
439 |
1479 |
597 |
0 |
0 |
| CDI |
0 |
48 |
39 |
161 |
4419 |
6020 |
23 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3857 |
4422 |
81 |
0 |
|
Date: 2025-07-12:
| 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 |
2441 |
4136 |
37 |
25 |
23 |
1 |
0 |
0 |
| OW |
25 |
1199 |
230 |
262 |
77 |
9 |
5 |
0 |
| VODI |
0 |
480 |
272 |
1001 |
634 |
19 |
1 |
0 |
| ODI |
0 |
121 |
96 |
456 |
1497 |
308 |
0 |
0 |
| CDI |
0 |
75 |
40 |
222 |
3044 |
7383 |
4 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
66 |
7718 |
174 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2441 |
4263 |
46 |
41 |
30 |
1 |
0 |
0 |
| OW |
25 |
1085 |
229 |
249 |
74 |
8 |
5 |
0 |
| VODI |
0 |
464 |
265 |
999 |
629 |
23 |
1 |
0 |
| ODI |
0 |
129 |
94 |
448 |
1363 |
440 |
0 |
0 |
| CDI |
0 |
70 |
41 |
229 |
3174 |
7096 |
8 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
71 |
7870 |
170 |
0 |
|
Date: 2025-07-14:
| 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 |
2592 |
4424 |
47 |
21 |
21 |
0 |
0 |
0 |
| OW |
11 |
1663 |
502 |
336 |
43 |
9 |
0 |
0 |
| VODI |
0 |
85 |
215 |
1430 |
645 |
10 |
0 |
0 |
| ODI |
0 |
5 |
12 |
192 |
2975 |
421 |
0 |
0 |
| CDI |
0 |
0 |
0 |
16 |
840 |
13427 |
93 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
39 |
2001 |
7 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2568 |
4040 |
47 |
24 |
24 |
1 |
0 |
0 |
| OW |
35 |
1286 |
220 |
280 |
98 |
14 |
0 |
0 |
| VODI |
0 |
578 |
328 |
941 |
577 |
30 |
0 |
0 |
| ODI |
0 |
201 |
132 |
438 |
1326 |
681 |
0 |
0 |
| CDI |
0 |
72 |
49 |
312 |
2437 |
8513 |
69 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
101 |
6629 |
31 |
0 |
|
Date: 2025-07-16:
| 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 |
2753 |
4347 |
40 |
31 |
7 |
0 |
0 |
0 |
| OW |
4 |
1703 |
438 |
434 |
48 |
1 |
0 |
0 |
| VODI |
0 |
208 |
307 |
1351 |
556 |
30 |
0 |
0 |
| ODI |
0 |
5 |
18 |
337 |
2806 |
262 |
1 |
0 |
| CDI |
0 |
0 |
0 |
57 |
1437 |
13423 |
480 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
694 |
304 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2719 |
3889 |
51 |
39 |
15 |
0 |
0 |
0 |
| OW |
38 |
1381 |
248 |
398 |
93 |
14 |
0 |
0 |
| VODI |
0 |
693 |
305 |
930 |
503 |
62 |
0 |
0 |
| ODI |
0 |
221 |
147 |
461 |
1573 |
381 |
0 |
0 |
| CDI |
0 |
79 |
52 |
382 |
2650 |
8521 |
206 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
20 |
5432 |
579 |
0 |
|
Date: 2025-07-18:
| 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 |
2611 |
4548 |
41 |
31 |
2 |
1 |
0 |
0 |
| OW |
1 |
2061 |
435 |
394 |
43 |
12 |
0 |
0 |
| VODI |
0 |
501 |
391 |
1279 |
489 |
15 |
0 |
0 |
| ODI |
0 |
45 |
68 |
591 |
2576 |
130 |
1 |
0 |
| CDI |
0 |
2 |
9 |
92 |
3714 |
10675 |
971 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
337 |
16 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2596 |
4053 |
37 |
38 |
5 |
4 |
0 |
0 |
| OW |
16 |
1664 |
265 |
457 |
72 |
15 |
0 |
0 |
| VODI |
0 |
971 |
391 |
797 |
462 |
30 |
0 |
0 |
| ODI |
0 |
387 |
178 |
647 |
1476 |
160 |
0 |
0 |
| CDI |
0 |
82 |
73 |
448 |
4396 |
7253 |
213 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
413 |
3708 |
775 |
0 |
|
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