Validation of sea ice concentration - Asian sector
Bulletin date: 2025-06-26
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-06-22:
| 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 |
323 |
2709 |
21 |
15 |
1 |
0 |
0 |
0 |
| OW |
15 |
1554 |
158 |
131 |
16 |
8 |
0 |
0 |
| VODI |
0 |
832 |
325 |
781 |
410 |
58 |
11 |
0 |
| ODI |
0 |
97 |
109 |
398 |
790 |
437 |
79 |
0 |
| CDI |
0 |
28 |
44 |
271 |
1414 |
2947 |
1320 |
2 |
| VCDI |
0 |
0 |
0 |
13 |
497 |
3333 |
10112 |
2823 |
|
...date precedes bulletin
|
Date: 2025-06-24:
| 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 |
811 |
3015 |
42 |
14 |
0 |
0 |
0 |
0 |
| OW |
1 |
1490 |
273 |
167 |
18 |
3 |
1 |
0 |
| VODI |
0 |
296 |
312 |
954 |
515 |
39 |
14 |
0 |
| ODI |
0 |
17 |
36 |
297 |
1077 |
598 |
58 |
0 |
| CDI |
0 |
0 |
11 |
101 |
1269 |
5277 |
1422 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
983 |
1789 |
9843 |
1339 |
|
...date precedes bulletin
|
Date: 2025-06-26:
| 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 |
1022 |
3068 |
25 |
18 |
8 |
0 |
0 |
0 |
| OW |
1 |
1572 |
205 |
121 |
15 |
3 |
0 |
0 |
| VODI |
0 |
375 |
372 |
809 |
330 |
106 |
14 |
0 |
| ODI |
0 |
35 |
55 |
432 |
818 |
659 |
72 |
0 |
| CDI |
0 |
2 |
11 |
210 |
1244 |
6017 |
2201 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
8 |
1858 |
9477 |
919 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1022 |
3277 |
27 |
24 |
9 |
0 |
0 |
0 |
| OW |
1 |
1363 |
209 |
120 |
14 |
5 |
0 |
0 |
| VODI |
0 |
368 |
359 |
796 |
313 |
103 |
15 |
0 |
| ODI |
0 |
43 |
63 |
429 |
846 |
604 |
75 |
0 |
| CDI |
0 |
1 |
10 |
221 |
1225 |
6253 |
2523 |
26 |
| VCDI |
0 |
0 |
0 |
0 |
16 |
1678 |
9151 |
893 |
|
Date: 2025-06-28:
| 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 |
1182 |
3083 |
25 |
24 |
10 |
3 |
0 |
0 |
| OW |
1 |
1672 |
169 |
133 |
20 |
7 |
1 |
0 |
| VODI |
0 |
421 |
290 |
658 |
330 |
139 |
20 |
0 |
| ODI |
0 |
49 |
86 |
361 |
874 |
659 |
97 |
0 |
| CDI |
0 |
4 |
19 |
213 |
1522 |
6181 |
1392 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
400 |
2310 |
9727 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1182 |
3236 |
22 |
24 |
11 |
5 |
1 |
0 |
| OW |
1 |
1522 |
189 |
165 |
21 |
7 |
1 |
0 |
| VODI |
0 |
415 |
269 |
607 |
290 |
144 |
21 |
0 |
| ODI |
0 |
51 |
88 |
365 |
961 |
657 |
89 |
0 |
| CDI |
0 |
5 |
21 |
228 |
1509 |
6362 |
1475 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
364 |
2124 |
9650 |
0 |
|
Date: 2025-06-30:
| 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 |
1256 |
3371 |
28 |
29 |
12 |
9 |
0 |
0 |
| OW |
1 |
1439 |
236 |
227 |
49 |
14 |
1 |
0 |
| VODI |
0 |
355 |
189 |
488 |
248 |
172 |
11 |
0 |
| ODI |
0 |
118 |
118 |
405 |
1083 |
744 |
60 |
0 |
| CDI |
0 |
11 |
21 |
271 |
1931 |
6152 |
1335 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
118 |
2758 |
8187 |
631 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1256 |
3093 |
22 |
19 |
12 |
8 |
0 |
0 |
| OW |
1 |
1622 |
231 |
219 |
26 |
5 |
1 |
0 |
| VODI |
0 |
456 |
200 |
506 |
261 |
191 |
13 |
0 |
| ODI |
0 |
112 |
118 |
434 |
1174 |
815 |
64 |
0 |
| CDI |
0 |
11 |
21 |
244 |
1869 |
6193 |
1264 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
99 |
2637 |
8252 |
631 |
|
Date: 2025-07-02:
| 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 |
1190 |
3968 |
54 |
45 |
13 |
0 |
1 |
0 |
| OW |
0 |
1194 |
334 |
271 |
51 |
27 |
3 |
0 |
| VODI |
0 |
157 |
217 |
657 |
274 |
76 |
3 |
0 |
| ODI |
0 |
21 |
32 |
349 |
1724 |
627 |
15 |
0 |
| CDI |
0 |
2 |
4 |
131 |
2234 |
6904 |
975 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
15 |
2438 |
7916 |
160 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1189 |
3094 |
22 |
19 |
7 |
0 |
1 |
0 |
| OW |
1 |
1613 |
224 |
213 |
62 |
45 |
1 |
0 |
| VODI |
0 |
475 |
238 |
467 |
362 |
242 |
16 |
0 |
| ODI |
0 |
134 |
122 |
432 |
1403 |
1156 |
21 |
0 |
| CDI |
0 |
26 |
33 |
300 |
2250 |
5240 |
1497 |
0 |
| VCDI |
0 |
0 |
2 |
22 |
227 |
3389 |
7377 |
160 |
|
Date: 2025-07-04:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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