Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-20
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-14:
| 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 |
0 |
276 |
23 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
90 |
26 |
37 |
0 |
0 |
0 |
0 |
| VODI |
0 |
60 |
10 |
43 |
8 |
0 |
0 |
0 |
| ODI |
0 |
34 |
6 |
40 |
22 |
7 |
0 |
3 |
| CDI |
0 |
24 |
6 |
24 |
75 |
40 |
37 |
43 |
| VCDI |
0 |
19 |
19 |
77 |
137 |
362 |
6836 |
24702 |
|
...date precedes bulletin
|
Date: 2025-03-16:
| 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 |
0 |
208 |
23 |
22 |
0 |
0 |
0 |
0 |
| OW |
0 |
99 |
11 |
30 |
6 |
0 |
0 |
0 |
| VODI |
0 |
68 |
17 |
52 |
14 |
0 |
0 |
0 |
| ODI |
0 |
25 |
7 |
38 |
40 |
11 |
5 |
0 |
| CDI |
0 |
22 |
5 |
25 |
78 |
131 |
90 |
12 |
| VCDI |
0 |
5 |
17 |
64 |
143 |
966 |
11511 |
19351 |
|
...date precedes bulletin
|
Date: 2025-03-18:
| 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 |
0 |
254 |
20 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
78 |
19 |
36 |
5 |
0 |
0 |
0 |
| VODI |
0 |
26 |
9 |
71 |
28 |
0 |
0 |
0 |
| ODI |
0 |
15 |
4 |
24 |
65 |
40 |
2 |
0 |
| CDI |
0 |
1 |
3 |
20 |
115 |
280 |
123 |
13 |
| VCDI |
0 |
0 |
0 |
5 |
118 |
1380 |
11775 |
18555 |
|
...date precedes bulletin
|
Date: 2025-03-20:
| 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 |
0 |
225 |
18 |
27 |
0 |
0 |
0 |
0 |
| OW |
0 |
60 |
16 |
43 |
5 |
0 |
0 |
0 |
| VODI |
0 |
25 |
5 |
62 |
36 |
0 |
0 |
0 |
| ODI |
0 |
10 |
9 |
34 |
65 |
21 |
0 |
4 |
| CDI |
0 |
0 |
1 |
31 |
100 |
282 |
114 |
9 |
| VCDI |
0 |
0 |
0 |
13 |
111 |
1073 |
11769 |
18928 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
217 |
19 |
27 |
0 |
0 |
0 |
0 |
| OW |
0 |
64 |
15 |
43 |
4 |
0 |
0 |
0 |
| VODI |
0 |
29 |
5 |
62 |
27 |
0 |
0 |
0 |
| ODI |
0 |
10 |
8 |
35 |
75 |
26 |
1 |
4 |
| CDI |
0 |
0 |
1 |
33 |
104 |
297 |
133 |
13 |
| VCDI |
0 |
0 |
1 |
10 |
107 |
1053 |
11749 |
18924 |
|
Date: 2025-03-22:
| 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 |
0 |
184 |
18 |
31 |
2 |
0 |
0 |
0 |
| OW |
0 |
66 |
11 |
37 |
7 |
0 |
0 |
0 |
| VODI |
0 |
36 |
7 |
39 |
52 |
0 |
0 |
0 |
| ODI |
0 |
12 |
11 |
37 |
51 |
27 |
7 |
3 |
| CDI |
0 |
0 |
2 |
48 |
76 |
175 |
129 |
18 |
| VCDI |
0 |
0 |
0 |
38 |
92 |
580 |
10032 |
21268 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
166 |
18 |
26 |
1 |
0 |
0 |
0 |
| OW |
0 |
75 |
13 |
35 |
7 |
0 |
0 |
0 |
| VODI |
0 |
45 |
7 |
47 |
42 |
0 |
0 |
0 |
| ODI |
0 |
12 |
9 |
40 |
64 |
29 |
10 |
3 |
| CDI |
0 |
0 |
2 |
52 |
83 |
202 |
150 |
18 |
| VCDI |
0 |
0 |
0 |
30 |
83 |
551 |
10008 |
21268 |
|
Date: 2025-03-24:
| 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 |
0 |
229 |
23 |
14 |
0 |
0 |
0 |
0 |
| OW |
0 |
103 |
30 |
57 |
2 |
0 |
0 |
0 |
| VODI |
0 |
32 |
10 |
79 |
60 |
0 |
0 |
0 |
| ODI |
0 |
6 |
4 |
27 |
53 |
12 |
0 |
2 |
| CDI |
0 |
0 |
6 |
32 |
76 |
63 |
25 |
14 |
| VCDI |
0 |
0 |
0 |
36 |
99 |
407 |
7351 |
24244 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
153 |
19 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
89 |
22 |
39 |
4 |
0 |
0 |
0 |
| VODI |
0 |
77 |
8 |
67 |
23 |
0 |
0 |
0 |
| ODI |
0 |
27 |
4 |
30 |
60 |
8 |
0 |
2 |
| CDI |
0 |
18 |
9 |
25 |
85 |
63 |
22 |
21 |
| VCDI |
0 |
6 |
11 |
74 |
118 |
411 |
7354 |
24237 |
|
Date: 2025-03-26:
| 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 |
0 |
305 |
14 |
3 |
0 |
0 |
0 |
0 |
| OW |
0 |
156 |
18 |
17 |
1 |
0 |
0 |
0 |
| VODI |
0 |
144 |
27 |
31 |
13 |
1 |
0 |
0 |
| ODI |
0 |
22 |
22 |
53 |
35 |
26 |
0 |
0 |
| CDI |
0 |
11 |
13 |
76 |
69 |
98 |
2 |
6 |
| VCDI |
0 |
1 |
8 |
97 |
213 |
881 |
7044 |
23689 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
189 |
3 |
3 |
0 |
0 |
0 |
0 |
| OW |
0 |
156 |
9 |
7 |
0 |
0 |
0 |
0 |
| VODI |
0 |
166 |
23 |
18 |
22 |
14 |
0 |
0 |
| ODI |
0 |
57 |
22 |
35 |
30 |
34 |
0 |
0 |
| CDI |
0 |
46 |
22 |
64 |
52 |
127 |
46 |
10 |
| VCDI |
0 |
25 |
23 |
150 |
227 |
831 |
7000 |
23685 |
|
Date: 2025-03-28:
| 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 |
4 |
341 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
8 |
213 |
13 |
15 |
8 |
0 |
0 |
0 |
| VODI |
12 |
171 |
17 |
61 |
20 |
3 |
0 |
0 |
| ODI |
1 |
75 |
8 |
60 |
29 |
14 |
1 |
9 |
| CDI |
0 |
55 |
39 |
46 |
149 |
133 |
19 |
44 |
| VCDI |
0 |
9 |
27 |
129 |
283 |
1197 |
7525 |
22355 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12 |
193 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
13 |
180 |
7 |
10 |
1 |
0 |
0 |
0 |
| VODI |
0 |
174 |
18 |
51 |
21 |
2 |
0 |
0 |
| ODI |
0 |
101 |
12 |
41 |
34 |
27 |
5 |
26 |
| CDI |
0 |
173 |
31 |
86 |
123 |
195 |
89 |
70 |
| VCDI |
0 |
43 |
38 |
123 |
310 |
1123 |
7451 |
22312 |
|
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