Validation of sea ice concentration - Full domain
Bulletin date: 2025-08-14
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-08-08:
| 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 |
121784 |
13157 |
90 |
163 |
2 |
0 |
0 |
0 |
| OW |
304 |
5083 |
809 |
1497 |
69 |
0 |
0 |
0 |
| VODI |
0 |
571 |
481 |
5518 |
1828 |
30 |
0 |
0 |
| ODI |
0 |
22 |
17 |
818 |
9086 |
1399 |
53 |
0 |
| CDI |
0 |
0 |
0 |
40 |
3971 |
19410 |
3066 |
0 |
| VCDI |
0 |
0 |
0 |
18 |
66 |
244 |
3559 |
1588 |
|
...date precedes bulletin
|
Date: 2025-08-10:
| 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 |
123494 |
11646 |
87 |
65 |
0 |
0 |
0 |
0 |
| OW |
393 |
5535 |
901 |
1096 |
32 |
2 |
0 |
0 |
| VODI |
3 |
720 |
635 |
6382 |
1160 |
18 |
0 |
0 |
| ODI |
0 |
41 |
42 |
1076 |
8496 |
2286 |
33 |
0 |
| CDI |
0 |
5 |
1 |
88 |
6078 |
15410 |
3519 |
3 |
| VCDI |
0 |
0 |
0 |
11 |
79 |
825 |
3824 |
757 |
|
...date precedes bulletin
|
Date: 2025-08-12:
| 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 |
126177 |
11538 |
117 |
75 |
1 |
0 |
0 |
0 |
| OW |
565 |
4713 |
1192 |
1408 |
15 |
0 |
0 |
0 |
| VODI |
2 |
260 |
300 |
5986 |
983 |
1 |
0 |
0 |
| ODI |
0 |
5 |
2 |
424 |
12290 |
676 |
1 |
0 |
| CDI |
0 |
2 |
0 |
17 |
3387 |
16273 |
1188 |
0 |
| VCDI |
0 |
0 |
0 |
25 |
125 |
2122 |
4816 |
57 |
|
...date precedes bulletin
|
Date: 2025-08-14:
| 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 |
126997 |
10869 |
128 |
67 |
6 |
0 |
0 |
0 |
| OW |
773 |
5007 |
1048 |
1036 |
35 |
0 |
0 |
0 |
| VODI |
25 |
331 |
426 |
6335 |
738 |
1 |
0 |
0 |
| ODI |
0 |
8 |
1 |
583 |
12235 |
854 |
0 |
0 |
| CDI |
0 |
1 |
0 |
19 |
3828 |
15596 |
883 |
0 |
| VCDI |
0 |
9 |
0 |
15 |
108 |
1531 |
4494 |
756 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
127043 |
11105 |
157 |
128 |
5 |
0 |
0 |
0 |
| OW |
717 |
4807 |
1058 |
1033 |
43 |
0 |
0 |
0 |
| VODI |
35 |
294 |
388 |
6124 |
896 |
1 |
0 |
0 |
| ODI |
0 |
9 |
0 |
736 |
11947 |
1427 |
0 |
0 |
| CDI |
0 |
1 |
0 |
20 |
3943 |
15136 |
1021 |
0 |
| VCDI |
0 |
9 |
0 |
14 |
116 |
1418 |
4356 |
756 |
|
Date: 2025-08-16:
| 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 |
127732 |
10284 |
73 |
40 |
3 |
0 |
0 |
0 |
| OW |
831 |
5446 |
814 |
715 |
46 |
0 |
0 |
0 |
| VODI |
4 |
674 |
726 |
6202 |
944 |
1 |
0 |
0 |
| ODI |
0 |
20 |
2 |
908 |
12247 |
693 |
0 |
0 |
| CDI |
0 |
1 |
0 |
50 |
4670 |
13191 |
1030 |
0 |
| VCDI |
0 |
4 |
0 |
6 |
92 |
1451 |
4547 |
1296 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
127787 |
10494 |
113 |
86 |
5 |
0 |
0 |
0 |
| OW |
764 |
5282 |
778 |
795 |
50 |
0 |
0 |
0 |
| VODI |
16 |
626 |
719 |
5876 |
1171 |
1 |
0 |
0 |
| ODI |
0 |
22 |
5 |
1098 |
12042 |
1539 |
0 |
0 |
| CDI |
0 |
1 |
0 |
60 |
4614 |
12376 |
1404 |
0 |
| VCDI |
0 |
4 |
0 |
6 |
120 |
1420 |
4173 |
1296 |
|
Date: 2025-08-18:
| 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 |
129119 |
11593 |
74 |
53 |
2 |
0 |
0 |
0 |
| OW |
461 |
4299 |
1523 |
1907 |
11 |
0 |
0 |
0 |
| VODI |
3 |
53 |
91 |
5411 |
1254 |
1 |
0 |
0 |
| ODI |
0 |
3 |
2 |
233 |
15710 |
423 |
0 |
0 |
| CDI |
0 |
0 |
0 |
37 |
2454 |
12186 |
289 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
47 |
1138 |
5423 |
941 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
128700 |
9548 |
111 |
68 |
4 |
0 |
0 |
0 |
| OW |
859 |
5461 |
725 |
752 |
43 |
0 |
0 |
0 |
| VODI |
23 |
915 |
848 |
5500 |
1613 |
11 |
0 |
0 |
| ODI |
1 |
24 |
5 |
1242 |
13095 |
995 |
3 |
0 |
| CDI |
0 |
0 |
1 |
65 |
4613 |
11119 |
1156 |
0 |
| VCDI |
0 |
0 |
0 |
16 |
110 |
1623 |
4553 |
941 |
|
Date: 2025-08-20:
| 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 |
129656 |
11199 |
73 |
50 |
1 |
0 |
0 |
0 |
| OW |
476 |
5492 |
1174 |
1139 |
5 |
0 |
0 |
0 |
| VODI |
9 |
213 |
482 |
5123 |
1308 |
4 |
0 |
0 |
| ODI |
0 |
5 |
0 |
618 |
13359 |
2269 |
4 |
0 |
| CDI |
0 |
0 |
0 |
71 |
2578 |
10982 |
1189 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
77 |
1822 |
5236 |
129 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
129154 |
9161 |
92 |
86 |
3 |
0 |
0 |
0 |
| OW |
970 |
5882 |
559 |
654 |
25 |
1 |
0 |
0 |
| VODI |
17 |
1818 |
1059 |
4660 |
1709 |
26 |
1 |
0 |
| ODI |
0 |
48 |
19 |
1465 |
11419 |
2218 |
16 |
0 |
| CDI |
0 |
0 |
0 |
124 |
4046 |
10833 |
1522 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
126 |
1999 |
4890 |
129 |
|
Date: 2025-08-22:
| 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 |
130106 |
10919 |
71 |
38 |
0 |
0 |
0 |
0 |
| OW |
662 |
5863 |
1016 |
910 |
5 |
0 |
0 |
0 |
| VODI |
8 |
363 |
608 |
4907 |
1539 |
1 |
0 |
0 |
| ODI |
0 |
2 |
0 |
814 |
11827 |
2878 |
1 |
0 |
| CDI |
0 |
0 |
0 |
108 |
3210 |
10734 |
1537 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
75 |
1970 |
4387 |
184 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
129547 |
8806 |
80 |
46 |
1 |
0 |
0 |
0 |
| OW |
1098 |
6071 |
513 |
866 |
52 |
2 |
0 |
0 |
| VODI |
131 |
2192 |
1070 |
3987 |
2049 |
67 |
0 |
0 |
| ODI |
0 |
78 |
32 |
1697 |
9634 |
2779 |
114 |
0 |
| CDI |
0 |
0 |
0 |
170 |
4820 |
10776 |
1744 |
2 |
| VCDI |
0 |
0 |
0 |
11 |
100 |
1959 |
4067 |
182 |
|
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