Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-07
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-01:
| 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 |
99390 |
15621 |
174 |
64 |
5 |
0 |
0 |
0 |
| OW |
2000 |
4671 |
1164 |
1045 |
66 |
0 |
0 |
0 |
| VODI |
1950 |
643 |
898 |
5060 |
1490 |
23 |
1 |
0 |
| ODI |
0 |
59 |
45 |
998 |
8801 |
6939 |
185 |
0 |
| CDI |
0 |
65 |
37 |
137 |
5011 |
16176 |
3348 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
56 |
2363 |
2323 |
0 |
|
...date precedes bulletin
|
Date: 2025-08-03:
| 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 |
101313 |
13609 |
166 |
57 |
6 |
0 |
0 |
0 |
| OW |
2139 |
5112 |
1115 |
982 |
61 |
0 |
0 |
0 |
| VODI |
1919 |
1095 |
1035 |
5259 |
1564 |
15 |
1 |
0 |
| ODI |
0 |
91 |
58 |
1426 |
8043 |
7501 |
333 |
0 |
| CDI |
0 |
94 |
30 |
189 |
4433 |
14338 |
4450 |
202 |
| VCDI |
0 |
1 |
6 |
15 |
141 |
1089 |
2701 |
221 |
|
...date precedes bulletin
|
Date: 2025-08-05:
| 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 |
103509 |
13760 |
201 |
90 |
6 |
1 |
0 |
0 |
| OW |
2232 |
4743 |
1488 |
1223 |
65 |
0 |
0 |
0 |
| VODI |
1899 |
192 |
490 |
5203 |
1912 |
84 |
0 |
0 |
| ODI |
0 |
8 |
13 |
585 |
8477 |
1761 |
15 |
0 |
| CDI |
0 |
5 |
10 |
45 |
4380 |
17889 |
2970 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
6 |
1305 |
5523 |
716 |
|
...date precedes bulletin
|
Date: 2025-08-07:
| 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 |
102763 |
14945 |
191 |
109 |
6 |
0 |
0 |
0 |
| OW |
2074 |
5013 |
1226 |
1155 |
128 |
2 |
0 |
0 |
| VODI |
1869 |
522 |
653 |
4840 |
1897 |
88 |
0 |
0 |
| ODI |
0 |
18 |
43 |
858 |
7594 |
2526 |
51 |
0 |
| CDI |
0 |
7 |
7 |
137 |
5036 |
16960 |
4347 |
0 |
| VCDI |
0 |
2 |
3 |
3 |
6 |
677 |
3909 |
1145 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
102728 |
15448 |
273 |
172 |
15 |
0 |
0 |
0 |
| OW |
2109 |
4495 |
1187 |
1266 |
143 |
2 |
0 |
0 |
| VODI |
1869 |
525 |
602 |
4569 |
2012 |
106 |
0 |
0 |
| ODI |
0 |
30 |
44 |
934 |
7396 |
2627 |
45 |
0 |
| CDI |
0 |
7 |
14 |
158 |
5095 |
16612 |
4135 |
0 |
| VCDI |
0 |
2 |
3 |
3 |
6 |
906 |
4127 |
1145 |
|
Date: 2025-08-09:
| 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 |
104353 |
13763 |
163 |
71 |
5 |
0 |
0 |
0 |
| OW |
2187 |
5277 |
1048 |
977 |
78 |
4 |
0 |
0 |
| VODI |
1832 |
1003 |
952 |
4714 |
1727 |
65 |
0 |
0 |
| ODI |
0 |
61 |
62 |
1177 |
7908 |
2638 |
80 |
0 |
| CDI |
0 |
6 |
23 |
181 |
5109 |
15474 |
4495 |
3 |
| VCDI |
0 |
3 |
4 |
3 |
21 |
596 |
3715 |
1032 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104324 |
14281 |
254 |
132 |
8 |
0 |
0 |
0 |
| OW |
2216 |
4839 |
1013 |
1086 |
100 |
10 |
0 |
0 |
| VODI |
1832 |
911 |
892 |
4468 |
1790 |
77 |
0 |
0 |
| ODI |
0 |
72 |
65 |
1250 |
7336 |
2628 |
58 |
0 |
| CDI |
0 |
7 |
24 |
184 |
5593 |
15277 |
4196 |
3 |
| VCDI |
0 |
3 |
4 |
3 |
21 |
785 |
4036 |
1032 |
|
Date: 2025-08-11:
| 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 |
105189 |
15214 |
209 |
69 |
8 |
0 |
0 |
0 |
| OW |
2334 |
4746 |
1716 |
994 |
23 |
0 |
0 |
0 |
| VODI |
1739 |
33 |
264 |
5707 |
1290 |
20 |
1 |
0 |
| ODI |
0 |
2 |
4 |
462 |
11672 |
1229 |
0 |
0 |
| CDI |
0 |
1 |
6 |
11 |
2399 |
17722 |
377 |
0 |
| VCDI |
0 |
4 |
2 |
1 |
21 |
1192 |
6109 |
40 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105046 |
13630 |
246 |
100 |
16 |
2 |
0 |
0 |
| OW |
2421 |
5185 |
940 |
963 |
97 |
24 |
0 |
0 |
| VODI |
1795 |
1089 |
910 |
4724 |
1674 |
117 |
9 |
0 |
| ODI |
0 |
88 |
83 |
1254 |
7382 |
2396 |
65 |
0 |
| CDI |
0 |
3 |
17 |
200 |
6209 |
15507 |
2627 |
0 |
| VCDI |
0 |
5 |
5 |
3 |
35 |
2117 |
3786 |
40 |
|
Date: 2025-08-13:
| 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 |
106313 |
14420 |
205 |
71 |
5 |
0 |
0 |
0 |
| OW |
2470 |
5066 |
1292 |
890 |
44 |
2 |
0 |
0 |
| VODI |
1707 |
409 |
811 |
5240 |
1045 |
36 |
0 |
0 |
| ODI |
0 |
3 |
3 |
981 |
10755 |
1665 |
1 |
0 |
| CDI |
0 |
2 |
3 |
14 |
4880 |
13843 |
1929 |
0 |
| VCDI |
0 |
4 |
1 |
2 |
50 |
1530 |
4552 |
566 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
106098 |
12778 |
240 |
106 |
15 |
0 |
0 |
0 |
| OW |
2612 |
5389 |
852 |
977 |
99 |
23 |
0 |
0 |
| VODI |
1780 |
1641 |
1098 |
4354 |
1270 |
205 |
0 |
0 |
| ODI |
0 |
87 |
104 |
1488 |
7090 |
2142 |
30 |
0 |
| CDI |
0 |
3 |
18 |
267 |
8263 |
13203 |
2860 |
0 |
| VCDI |
0 |
6 |
3 |
6 |
42 |
1503 |
3592 |
566 |
|
Date: 2025-08-15:
| 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 |
108185 |
12709 |
135 |
60 |
5 |
0 |
0 |
0 |
| OW |
2728 |
5607 |
928 |
564 |
46 |
9 |
0 |
0 |
| VODI |
1539 |
700 |
1110 |
5296 |
931 |
29 |
0 |
0 |
| ODI |
0 |
10 |
17 |
1266 |
11035 |
1406 |
0 |
0 |
| CDI |
0 |
3 |
1 |
36 |
3928 |
14157 |
1599 |
0 |
| VCDI |
0 |
4 |
1 |
3 |
50 |
1728 |
4672 |
313 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107882 |
10952 |
177 |
147 |
31 |
0 |
0 |
0 |
| OW |
2810 |
5913 |
718 |
665 |
143 |
6 |
0 |
0 |
| VODI |
1760 |
2004 |
1163 |
4508 |
1223 |
161 |
0 |
0 |
| ODI |
0 |
153 |
108 |
1555 |
6899 |
1763 |
34 |
0 |
| CDI |
0 |
4 |
24 |
344 |
7621 |
13982 |
2299 |
8 |
| VCDI |
0 |
7 |
2 |
6 |
78 |
1417 |
3938 |
305 |
|
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