Validation of sea ice concentration - Asian sector
Bulletin date: 2025-06-19
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-13:
| 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 |
213 |
2075 |
22 |
8 |
2 |
0 |
1 |
0 |
| OW |
2 |
1348 |
160 |
132 |
23 |
13 |
1 |
0 |
| VODI |
11 |
423 |
286 |
833 |
361 |
47 |
32 |
0 |
| ODI |
0 |
41 |
53 |
473 |
1115 |
551 |
125 |
0 |
| CDI |
0 |
16 |
38 |
135 |
832 |
3720 |
2659 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
358 |
940 |
7520 |
7509 |
|
...date precedes bulletin
|
Date: 2025-06-15:
| 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 |
220 |
2120 |
26 |
9 |
3 |
0 |
1 |
0 |
| OW |
6 |
1312 |
177 |
143 |
18 |
4 |
1 |
0 |
| VODI |
7 |
446 |
329 |
848 |
371 |
64 |
42 |
0 |
| ODI |
0 |
55 |
63 |
543 |
981 |
603 |
172 |
0 |
| CDI |
0 |
21 |
38 |
179 |
926 |
2825 |
2503 |
1 |
| VCDI |
0 |
0 |
0 |
5 |
347 |
1791 |
9572 |
5310 |
|
...date precedes bulletin
|
Date: 2025-06-17:
| 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 |
227 |
2648 |
34 |
20 |
0 |
0 |
1 |
0 |
| OW |
11 |
1229 |
218 |
131 |
10 |
3 |
0 |
0 |
| VODI |
2 |
306 |
389 |
998 |
329 |
22 |
7 |
0 |
| ODI |
0 |
11 |
29 |
454 |
1265 |
474 |
25 |
0 |
| CDI |
0 |
3 |
13 |
119 |
979 |
2553 |
650 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
88 |
2792 |
9707 |
6334 |
|
...date precedes bulletin
|
Date: 2025-06-19:
| 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 |
255 |
2677 |
36 |
28 |
0 |
0 |
0 |
0 |
| OW |
15 |
1459 |
152 |
91 |
24 |
4 |
0 |
0 |
| VODI |
0 |
663 |
415 |
775 |
336 |
18 |
6 |
0 |
| ODI |
0 |
50 |
74 |
429 |
1048 |
441 |
61 |
0 |
| CDI |
0 |
36 |
38 |
199 |
951 |
2737 |
763 |
0 |
| VCDI |
0 |
0 |
0 |
17 |
151 |
3256 |
10939 |
3938 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
256 |
2850 |
40 |
29 |
1 |
0 |
0 |
0 |
| OW |
14 |
1328 |
165 |
100 |
24 |
4 |
1 |
0 |
| VODI |
0 |
615 |
391 |
741 |
312 |
33 |
7 |
0 |
| ODI |
0 |
64 |
80 |
442 |
1082 |
410 |
55 |
0 |
| CDI |
0 |
27 |
36 |
199 |
889 |
2615 |
687 |
0 |
| VCDI |
0 |
1 |
3 |
28 |
202 |
3394 |
11019 |
3938 |
|
Date: 2025-06-21:
| 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 |
315 |
2637 |
28 |
14 |
1 |
0 |
0 |
0 |
| OW |
15 |
1539 |
163 |
106 |
18 |
4 |
0 |
0 |
| VODI |
0 |
822 |
328 |
763 |
402 |
52 |
4 |
0 |
| ODI |
0 |
84 |
88 |
420 |
857 |
389 |
66 |
0 |
| CDI |
0 |
36 |
48 |
231 |
1337 |
2815 |
1313 |
8 |
| VCDI |
0 |
0 |
0 |
10 |
217 |
3016 |
11177 |
2759 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
318 |
2768 |
30 |
17 |
2 |
0 |
0 |
0 |
| OW |
12 |
1458 |
162 |
106 |
20 |
13 |
0 |
0 |
| VODI |
0 |
761 |
309 |
680 |
391 |
57 |
4 |
0 |
| ODI |
0 |
103 |
105 |
488 |
882 |
394 |
93 |
0 |
| CDI |
0 |
28 |
49 |
239 |
1252 |
2524 |
1342 |
42 |
| VCDI |
0 |
0 |
0 |
14 |
285 |
3288 |
11121 |
2725 |
|
Date: 2025-06-23:
| 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 |
307 |
3355 |
39 |
17 |
1 |
0 |
0 |
0 |
| OW |
2 |
1594 |
261 |
131 |
15 |
3 |
1 |
0 |
| VODI |
0 |
309 |
361 |
974 |
458 |
35 |
10 |
0 |
| ODI |
0 |
11 |
27 |
351 |
1234 |
529 |
40 |
0 |
| CDI |
0 |
2 |
11 |
83 |
1474 |
4399 |
972 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
751 |
2158 |
11038 |
1129 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
304 |
2939 |
29 |
16 |
1 |
0 |
0 |
0 |
| OW |
5 |
1472 |
182 |
145 |
25 |
4 |
1 |
0 |
| VODI |
0 |
734 |
332 |
689 |
405 |
72 |
16 |
0 |
| ODI |
0 |
101 |
104 |
424 |
835 |
502 |
64 |
0 |
| CDI |
0 |
25 |
52 |
275 |
1604 |
3227 |
1969 |
48 |
| VCDI |
0 |
0 |
0 |
7 |
1063 |
3319 |
10011 |
1081 |
|
Date: 2025-06-25:
| 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 |
954 |
3032 |
41 |
15 |
1 |
2 |
0 |
0 |
| OW |
0 |
1451 |
236 |
162 |
23 |
3 |
0 |
0 |
| VODI |
0 |
310 |
306 |
911 |
456 |
58 |
9 |
0 |
| ODI |
0 |
38 |
47 |
367 |
903 |
614 |
59 |
0 |
| CDI |
0 |
4 |
6 |
144 |
1072 |
5880 |
2183 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
479 |
1721 |
9555 |
1040 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
951 |
2459 |
34 |
22 |
7 |
3 |
0 |
0 |
| OW |
3 |
1478 |
201 |
192 |
38 |
1 |
0 |
0 |
| VODI |
0 |
729 |
246 |
667 |
421 |
83 |
9 |
0 |
| ODI |
0 |
108 |
103 |
389 |
649 |
513 |
112 |
0 |
| CDI |
0 |
61 |
52 |
299 |
1114 |
5694 |
5211 |
112 |
| VCDI |
0 |
0 |
0 |
30 |
705 |
1984 |
6474 |
928 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1117 |
2397 |
41 |
31 |
9 |
1 |
0 |
0 |
| OW |
7 |
1680 |
167 |
161 |
30 |
7 |
3 |
0 |
| VODI |
0 |
872 |
247 |
554 |
291 |
72 |
23 |
0 |
| ODI |
0 |
205 |
126 |
368 |
536 |
445 |
156 |
0 |
| CDI |
0 |
30 |
62 |
314 |
1281 |
5490 |
6212 |
2 |
| VCDI |
0 |
0 |
0 |
35 |
518 |
2865 |
5624 |
103 |
|
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