Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-06
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-02-28:
| 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 |
0 |
265 |
21 |
26 |
0 |
0 |
0 |
0 |
| OW |
0 |
114 |
22 |
30 |
12 |
0 |
0 |
0 |
| VODI |
0 |
95 |
24 |
71 |
15 |
13 |
0 |
0 |
| ODI |
0 |
39 |
9 |
32 |
21 |
24 |
0 |
0 |
| CDI |
0 |
23 |
13 |
40 |
114 |
120 |
2 |
6 |
| VCDI |
0 |
8 |
20 |
81 |
162 |
889 |
4886 |
25899 |
|
...date precedes bulletin
|
Date: 2025-03-02:
| 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 |
0 |
226 |
23 |
19 |
0 |
0 |
0 |
0 |
| OW |
0 |
105 |
9 |
41 |
8 |
0 |
0 |
0 |
| VODI |
0 |
74 |
25 |
63 |
43 |
0 |
0 |
0 |
| ODI |
0 |
45 |
8 |
33 |
32 |
2 |
7 |
0 |
| CDI |
0 |
31 |
6 |
21 |
76 |
44 |
28 |
2 |
| VCDI |
0 |
14 |
23 |
80 |
151 |
723 |
5092 |
26042 |
|
...date precedes bulletin
|
Date: 2025-03-04:
| 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 |
284 |
19 |
17 |
0 |
0 |
0 |
0 |
| OW |
0 |
105 |
6 |
25 |
5 |
0 |
0 |
0 |
| VODI |
0 |
89 |
28 |
74 |
32 |
0 |
0 |
0 |
| ODI |
0 |
45 |
4 |
20 |
44 |
7 |
0 |
0 |
| CDI |
0 |
10 |
8 |
10 |
73 |
59 |
4 |
1 |
| VCDI |
0 |
19 |
17 |
69 |
160 |
479 |
4436 |
26947 |
|
...date precedes bulletin
|
Date: 2025-03-06:
| 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 |
0 |
232 |
12 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
123 |
17 |
24 |
1 |
0 |
0 |
0 |
| VODI |
0 |
123 |
14 |
65 |
10 |
3 |
0 |
0 |
| ODI |
0 |
52 |
11 |
38 |
23 |
14 |
0 |
0 |
| CDI |
0 |
20 |
3 |
24 |
60 |
27 |
9 |
10 |
| VCDI |
0 |
30 |
22 |
93 |
183 |
361 |
4152 |
27328 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
238 |
13 |
13 |
0 |
0 |
0 |
0 |
| OW |
0 |
125 |
15 |
24 |
1 |
0 |
0 |
0 |
| VODI |
0 |
108 |
13 |
62 |
9 |
4 |
0 |
0 |
| ODI |
0 |
51 |
12 |
39 |
25 |
14 |
0 |
0 |
| CDI |
0 |
24 |
2 |
23 |
61 |
24 |
7 |
10 |
| VCDI |
0 |
34 |
24 |
95 |
181 |
363 |
4154 |
27328 |
|
Date: 2025-03-08:
| 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 |
0 |
187 |
10 |
27 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
21 |
10 |
13 |
0 |
0 |
0 |
| VODI |
0 |
134 |
13 |
54 |
11 |
0 |
0 |
0 |
| ODI |
0 |
52 |
10 |
40 |
21 |
5 |
1 |
0 |
| CDI |
0 |
18 |
21 |
42 |
44 |
32 |
27 |
29 |
| VCDI |
0 |
0 |
9 |
114 |
127 |
247 |
4333 |
27292 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
203 |
11 |
29 |
0 |
0 |
0 |
0 |
| OW |
0 |
141 |
19 |
11 |
13 |
0 |
0 |
0 |
| VODI |
0 |
120 |
14 |
50 |
11 |
0 |
0 |
0 |
| ODI |
0 |
47 |
6 |
39 |
21 |
5 |
1 |
0 |
| CDI |
0 |
29 |
17 |
54 |
49 |
35 |
26 |
28 |
| VCDI |
0 |
3 |
17 |
104 |
122 |
244 |
4334 |
27293 |
|
Date: 2025-03-10:
| 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 |
0 |
276 |
6 |
30 |
0 |
0 |
0 |
0 |
| OW |
0 |
161 |
40 |
20 |
7 |
0 |
0 |
0 |
| VODI |
0 |
62 |
21 |
80 |
12 |
0 |
0 |
0 |
| ODI |
0 |
1 |
8 |
52 |
31 |
8 |
3 |
0 |
| CDI |
0 |
0 |
0 |
50 |
60 |
39 |
33 |
16 |
| VCDI |
0 |
0 |
0 |
7 |
114 |
190 |
2817 |
28952 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
240 |
7 |
32 |
2 |
0 |
0 |
0 |
| OW |
0 |
108 |
24 |
12 |
9 |
0 |
0 |
0 |
| VODI |
0 |
73 |
14 |
38 |
10 |
0 |
0 |
0 |
| ODI |
0 |
48 |
7 |
62 |
20 |
8 |
0 |
0 |
| CDI |
0 |
30 |
17 |
40 |
65 |
30 |
57 |
19 |
| VCDI |
0 |
1 |
6 |
55 |
118 |
199 |
2796 |
28949 |
|
Date: 2025-03-12:
| 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 |
0 |
281 |
12 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
118 |
31 |
24 |
0 |
0 |
0 |
0 |
| VODI |
0 |
78 |
10 |
58 |
12 |
0 |
0 |
0 |
| ODI |
0 |
24 |
22 |
40 |
15 |
0 |
0 |
0 |
| CDI |
0 |
11 |
5 |
65 |
69 |
32 |
56 |
33 |
| VCDI |
0 |
0 |
1 |
13 |
116 |
333 |
4432 |
27195 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
236 |
17 |
22 |
0 |
0 |
0 |
0 |
| OW |
0 |
105 |
18 |
17 |
5 |
0 |
0 |
0 |
| VODI |
0 |
86 |
25 |
42 |
13 |
0 |
5 |
0 |
| ODI |
0 |
67 |
4 |
49 |
25 |
12 |
17 |
0 |
| CDI |
0 |
15 |
6 |
37 |
66 |
32 |
80 |
28 |
| VCDI |
0 |
3 |
11 |
43 |
103 |
321 |
4386 |
27200 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
205 |
22 |
17 |
0 |
0 |
0 |
0 |
| OW |
0 |
89 |
25 |
46 |
3 |
0 |
1 |
0 |
| VODI |
0 |
97 |
8 |
47 |
24 |
0 |
12 |
0 |
| ODI |
0 |
43 |
8 |
21 |
47 |
6 |
20 |
2 |
| CDI |
0 |
33 |
7 |
26 |
54 |
103 |
126 |
51 |
| VCDI |
0 |
36 |
20 |
74 |
114 |
300 |
6714 |
24695 |
|
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