Validation of sea ice concentration - Asian sector
Bulletin date: 2025-06-12
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-06:
| 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 |
89 |
1133 |
10 |
6 |
0 |
1 |
0 |
0 |
| OW |
0 |
1554 |
105 |
76 |
22 |
3 |
2 |
0 |
| VODI |
0 |
608 |
239 |
415 |
253 |
43 |
21 |
0 |
| ODI |
0 |
72 |
102 |
487 |
1067 |
406 |
139 |
0 |
| CDI |
0 |
5 |
24 |
188 |
1160 |
3747 |
1351 |
14 |
| VCDI |
0 |
0 |
0 |
4 |
68 |
1152 |
11386 |
6130 |
|
...date precedes bulletin
|
Date: 2025-06-08:
| 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 |
116 |
1116 |
10 |
15 |
0 |
0 |
1 |
0 |
| OW |
0 |
1626 |
84 |
43 |
12 |
5 |
1 |
0 |
| VODI |
0 |
739 |
277 |
480 |
222 |
38 |
18 |
0 |
| ODI |
7 |
133 |
123 |
576 |
1223 |
440 |
127 |
0 |
| CDI |
0 |
17 |
41 |
227 |
1155 |
3502 |
1464 |
7 |
| VCDI |
0 |
0 |
0 |
11 |
70 |
1845 |
8441 |
7870 |
|
...date precedes bulletin
|
Date: 2025-06-10:
| 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 |
178 |
1784 |
14 |
13 |
1 |
0 |
1 |
0 |
| OW |
0 |
1520 |
165 |
81 |
18 |
4 |
1 |
0 |
| VODI |
0 |
398 |
330 |
813 |
297 |
40 |
10 |
0 |
| ODI |
0 |
31 |
45 |
438 |
1511 |
521 |
46 |
0 |
| CDI |
0 |
6 |
23 |
172 |
659 |
4154 |
1922 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
156 |
669 |
7922 |
8136 |
|
...date precedes bulletin
|
Date: 2025-06-12:
| 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 |
201 |
2050 |
16 |
9 |
0 |
0 |
1 |
0 |
| OW |
0 |
1370 |
166 |
117 |
29 |
8 |
1 |
0 |
| VODI |
13 |
406 |
289 |
824 |
345 |
49 |
21 |
0 |
| ODI |
0 |
37 |
51 |
478 |
1196 |
542 |
103 |
0 |
| CDI |
0 |
10 |
39 |
135 |
783 |
3820 |
2842 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
256 |
816 |
7908 |
7147 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
201 |
2111 |
18 |
10 |
3 |
0 |
1 |
0 |
| OW |
1 |
1318 |
164 |
115 |
34 |
8 |
1 |
0 |
| VODI |
12 |
399 |
290 |
789 |
348 |
45 |
22 |
0 |
| ODI |
0 |
36 |
49 |
512 |
1183 |
454 |
81 |
0 |
| CDI |
0 |
9 |
38 |
130 |
807 |
3837 |
2531 |
7 |
| VCDI |
0 |
0 |
2 |
11 |
234 |
891 |
8240 |
7140 |
|
Date: 2025-06-14:
| 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 |
220 |
2113 |
21 |
8 |
2 |
0 |
1 |
0 |
| OW |
4 |
1312 |
173 |
135 |
16 |
6 |
0 |
0 |
| VODI |
9 |
449 |
290 |
854 |
362 |
67 |
31 |
0 |
| ODI |
0 |
47 |
68 |
496 |
1027 |
567 |
159 |
0 |
| CDI |
0 |
11 |
41 |
178 |
863 |
3400 |
2318 |
26 |
| VCDI |
0 |
0 |
0 |
1 |
374 |
1888 |
8250 |
6295 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
220 |
2198 |
30 |
13 |
2 |
0 |
1 |
0 |
| OW |
7 |
1254 |
170 |
135 |
24 |
10 |
0 |
0 |
| VODI |
6 |
431 |
282 |
812 |
346 |
61 |
26 |
0 |
| ODI |
0 |
41 |
71 |
551 |
1108 |
526 |
139 |
0 |
| CDI |
0 |
8 |
40 |
153 |
771 |
3252 |
2166 |
81 |
| VCDI |
0 |
0 |
0 |
8 |
393 |
2079 |
8427 |
6240 |
|
Date: 2025-06-16:
| 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 |
226 |
2577 |
34 |
18 |
1 |
0 |
1 |
0 |
| OW |
11 |
1182 |
224 |
118 |
9 |
2 |
0 |
0 |
| VODI |
2 |
280 |
348 |
1034 |
271 |
26 |
9 |
0 |
| ODI |
0 |
11 |
28 |
467 |
1327 |
543 |
34 |
0 |
| CDI |
0 |
2 |
14 |
94 |
779 |
2727 |
749 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
148 |
1641 |
11204 |
5941 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
226 |
2309 |
33 |
16 |
1 |
0 |
1 |
0 |
| OW |
12 |
1205 |
185 |
171 |
23 |
3 |
1 |
0 |
| VODI |
1 |
479 |
315 |
770 |
371 |
67 |
24 |
0 |
| ODI |
0 |
49 |
78 |
596 |
1011 |
633 |
160 |
0 |
| CDI |
0 |
8 |
33 |
153 |
748 |
2494 |
3146 |
20 |
| VCDI |
0 |
2 |
4 |
25 |
381 |
1742 |
8665 |
5921 |
|
Date: 2025-06-18:
| 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 |
246 |
2674 |
38 |
22 |
0 |
0 |
0 |
0 |
| OW |
15 |
1316 |
195 |
110 |
15 |
6 |
1 |
0 |
| VODI |
0 |
470 |
426 |
917 |
325 |
17 |
6 |
0 |
| ODI |
0 |
19 |
52 |
428 |
1201 |
424 |
43 |
0 |
| CDI |
0 |
10 |
27 |
160 |
1121 |
2531 |
637 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
60 |
2956 |
10587 |
5027 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
246 |
2366 |
39 |
22 |
0 |
0 |
0 |
0 |
| OW |
15 |
1289 |
183 |
177 |
30 |
5 |
0 |
0 |
| VODI |
0 |
703 |
301 |
665 |
369 |
48 |
33 |
0 |
| ODI |
0 |
111 |
168 |
523 |
1047 |
542 |
154 |
0 |
| CDI |
0 |
20 |
42 |
215 |
849 |
2801 |
3457 |
271 |
| VCDI |
0 |
0 |
5 |
35 |
427 |
2538 |
7630 |
4756 |
|
Date: 2025-06-20:
| 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 |
265 |
2681 |
35 |
20 |
0 |
0 |
0 |
0 |
| OW |
17 |
1479 |
155 |
109 |
21 |
3 |
0 |
0 |
| VODI |
0 |
757 |
358 |
750 |
389 |
43 |
11 |
0 |
| ODI |
0 |
74 |
88 |
417 |
918 |
396 |
93 |
0 |
| CDI |
0 |
39 |
45 |
232 |
995 |
2998 |
1099 |
0 |
| VCDI |
0 |
0 |
1 |
17 |
119 |
2925 |
10629 |
3904 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
270 |
2401 |
39 |
25 |
1 |
1 |
0 |
0 |
| OW |
12 |
1508 |
146 |
136 |
29 |
4 |
4 |
0 |
| VODI |
0 |
859 |
291 |
646 |
434 |
82 |
11 |
0 |
| ODI |
0 |
214 |
139 |
450 |
873 |
514 |
236 |
0 |
| CDI |
0 |
34 |
49 |
238 |
828 |
3210 |
3299 |
7 |
| VCDI |
0 |
14 |
18 |
50 |
277 |
2554 |
8282 |
3897 |
|
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