Validation of sea ice concentration - Asian sector
Bulletin date: 2025-07-03
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-27:
| 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 |
1123 |
3068 |
28 |
22 |
11 |
1 |
0 |
0 |
| OW |
1 |
1661 |
165 |
111 |
15 |
7 |
1 |
0 |
| VODI |
0 |
422 |
363 |
723 |
330 |
102 |
21 |
0 |
| ODI |
0 |
31 |
73 |
385 |
810 |
674 |
70 |
0 |
| CDI |
0 |
2 |
14 |
222 |
1411 |
5462 |
2152 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
88 |
2634 |
9774 |
105 |
|
...date precedes bulletin
|
Date: 2025-06-29:
| 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 |
1226 |
3098 |
23 |
24 |
9 |
5 |
0 |
0 |
| OW |
1 |
1627 |
194 |
180 |
26 |
8 |
0 |
0 |
| VODI |
0 |
428 |
260 |
575 |
299 |
149 |
20 |
0 |
| ODI |
0 |
89 |
112 |
379 |
980 |
657 |
87 |
0 |
| CDI |
0 |
6 |
14 |
257 |
1535 |
6160 |
1649 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
83 |
2624 |
9062 |
236 |
|
...date precedes bulletin
|
Date: 2025-07-01:
| 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 |
1245 |
3737 |
41 |
22 |
5 |
1 |
1 |
0 |
| OW |
1 |
1458 |
370 |
261 |
45 |
7 |
1 |
0 |
| VODI |
0 |
101 |
176 |
764 |
256 |
51 |
5 |
0 |
| ODI |
0 |
2 |
27 |
341 |
1633 |
697 |
21 |
0 |
| CDI |
0 |
1 |
0 |
66 |
1302 |
6763 |
1580 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
22 |
2304 |
8220 |
555 |
|
...date precedes bulletin
|
Date: 2025-07-03:
| 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 |
1210 |
3751 |
43 |
48 |
18 |
3 |
0 |
0 |
| OW |
0 |
1398 |
317 |
206 |
54 |
44 |
3 |
0 |
| VODI |
0 |
274 |
219 |
689 |
316 |
92 |
6 |
0 |
| ODI |
0 |
35 |
26 |
363 |
1584 |
943 |
18 |
0 |
| CDI |
0 |
5 |
14 |
150 |
2012 |
6456 |
813 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
53 |
2911 |
7864 |
144 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1210 |
3917 |
57 |
55 |
21 |
16 |
0 |
0 |
| OW |
0 |
1252 |
303 |
211 |
50 |
34 |
3 |
0 |
| VODI |
0 |
257 |
220 |
635 |
322 |
93 |
6 |
0 |
| ODI |
0 |
33 |
26 |
399 |
1506 |
864 |
17 |
0 |
| CDI |
0 |
4 |
13 |
156 |
2082 |
6496 |
942 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
56 |
2946 |
7736 |
144 |
|
Date: 2025-07-05:
| 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 |
1442 |
3668 |
39 |
45 |
25 |
15 |
0 |
0 |
| OW |
47 |
1439 |
182 |
157 |
63 |
44 |
1 |
0 |
| VODI |
0 |
355 |
251 |
712 |
406 |
112 |
10 |
0 |
| ODI |
0 |
38 |
40 |
422 |
2014 |
557 |
16 |
0 |
| CDI |
0 |
28 |
25 |
275 |
2374 |
5861 |
832 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
31 |
2820 |
7731 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1440 |
3856 |
51 |
60 |
34 |
28 |
0 |
0 |
| OW |
49 |
1296 |
174 |
152 |
55 |
44 |
2 |
0 |
| VODI |
0 |
317 |
248 |
649 |
417 |
99 |
9 |
0 |
| ODI |
0 |
37 |
41 |
505 |
1834 |
477 |
12 |
0 |
| CDI |
0 |
22 |
23 |
249 |
2539 |
5891 |
959 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
34 |
2870 |
7608 |
0 |
|
Date: 2025-07-07:
| 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 |
1411 |
4634 |
64 |
48 |
18 |
0 |
0 |
0 |
| OW |
28 |
1213 |
364 |
214 |
31 |
16 |
1 |
0 |
| VODI |
0 |
35 |
99 |
1090 |
445 |
31 |
3 |
0 |
| ODI |
0 |
19 |
18 |
217 |
2517 |
441 |
2 |
0 |
| CDI |
0 |
1 |
0 |
46 |
1113 |
8747 |
223 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
1798 |
6601 |
589 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1322 |
4164 |
61 |
63 |
43 |
28 |
3 |
0 |
| OW |
117 |
1210 |
118 |
135 |
35 |
53 |
2 |
0 |
| VODI |
0 |
410 |
257 |
605 |
397 |
140 |
2 |
0 |
| ODI |
0 |
70 |
72 |
575 |
1397 |
729 |
2 |
0 |
| CDI |
0 |
48 |
36 |
229 |
2230 |
7258 |
702 |
0 |
| VCDI |
0 |
0 |
1 |
8 |
27 |
2825 |
6119 |
589 |
|
Date: 2025-07-09:
| 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 |
1511 |
4938 |
57 |
60 |
11 |
1 |
0 |
0 |
| OW |
18 |
1173 |
240 |
213 |
58 |
20 |
0 |
0 |
| VODI |
0 |
200 |
248 |
990 |
441 |
32 |
0 |
0 |
| ODI |
0 |
28 |
30 |
373 |
1514 |
566 |
0 |
0 |
| CDI |
0 |
8 |
16 |
133 |
3275 |
6454 |
239 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
3745 |
5274 |
213 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1463 |
4359 |
60 |
81 |
37 |
2 |
0 |
0 |
| OW |
66 |
1153 |
131 |
138 |
73 |
49 |
0 |
0 |
| VODI |
0 |
599 |
222 |
645 |
489 |
125 |
0 |
0 |
| ODI |
0 |
149 |
115 |
588 |
966 |
653 |
1 |
0 |
| CDI |
0 |
83 |
61 |
295 |
2735 |
6325 |
372 |
0 |
| VCDI |
0 |
4 |
2 |
25 |
4744 |
5193 |
79 |
0 |
|
Date: 2025-07-11:
| 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 |
2273 |
4355 |
49 |
40 |
15 |
0 |
0 |
0 |
| OW |
0 |
1133 |
210 |
231 |
77 |
9 |
0 |
0 |
| VODI |
0 |
384 |
256 |
952 |
644 |
13 |
0 |
0 |
| ODI |
0 |
86 |
92 |
435 |
1410 |
338 |
0 |
0 |
| CDI |
0 |
66 |
47 |
198 |
3335 |
7512 |
26 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
190 |
7132 |
574 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
2273 |
3657 |
50 |
55 |
6 |
0 |
0 |
0 |
| OW |
0 |
1201 |
129 |
217 |
148 |
9 |
0 |
0 |
| VODI |
0 |
722 |
266 |
724 |
660 |
51 |
0 |
0 |
| ODI |
0 |
235 |
97 |
499 |
1276 |
413 |
1 |
0 |
| CDI |
0 |
203 |
106 |
348 |
3262 |
6252 |
90 |
0 |
| VCDI |
0 |
6 |
6 |
13 |
319 |
8279 |
509 |
0 |
|
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