Validation of sea ice concentration - Asian sector
Bulletin date: 2025-02-27
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-02-21:
| 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 |
220 |
33 |
41 |
0 |
0 |
0 |
0 |
| OW |
0 |
112 |
14 |
52 |
2 |
0 |
0 |
0 |
| VODI |
0 |
53 |
9 |
28 |
23 |
0 |
0 |
0 |
| ODI |
0 |
9 |
18 |
24 |
23 |
27 |
0 |
1 |
| CDI |
0 |
13 |
11 |
44 |
71 |
96 |
30 |
37 |
| VCDI |
0 |
0 |
0 |
26 |
98 |
478 |
7791 |
23712 |
|
...date precedes bulletin
|
Date: 2025-02-23:
| 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 |
304 |
13 |
11 |
0 |
0 |
0 |
0 |
| OW |
0 |
112 |
14 |
35 |
4 |
0 |
0 |
0 |
| VODI |
0 |
57 |
3 |
21 |
25 |
0 |
0 |
0 |
| ODI |
0 |
38 |
7 |
13 |
46 |
4 |
0 |
0 |
| CDI |
0 |
33 |
20 |
25 |
124 |
84 |
11 |
22 |
| VCDI |
0 |
4 |
8 |
70 |
154 |
826 |
6089 |
24919 |
|
...date precedes bulletin
|
Date: 2025-02-25:
| 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 |
1 |
370 |
8 |
18 |
0 |
0 |
0 |
0 |
| OW |
0 |
172 |
17 |
9 |
10 |
0 |
0 |
0 |
| VODI |
0 |
73 |
20 |
28 |
28 |
0 |
0 |
0 |
| ODI |
0 |
19 |
14 |
30 |
68 |
1 |
0 |
0 |
| CDI |
0 |
15 |
12 |
35 |
255 |
44 |
14 |
10 |
| VCDI |
0 |
2 |
12 |
99 |
276 |
1050 |
6165 |
24221 |
|
...date precedes bulletin
|
Date: 2025-02-27:
| 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 |
299 |
22 |
28 |
0 |
0 |
0 |
0 |
| OW |
0 |
119 |
27 |
23 |
11 |
0 |
0 |
0 |
| VODI |
0 |
111 |
16 |
53 |
27 |
0 |
0 |
0 |
| ODI |
0 |
25 |
17 |
20 |
36 |
13 |
0 |
0 |
| CDI |
0 |
15 |
8 |
50 |
113 |
124 |
6 |
1 |
| VCDI |
0 |
10 |
14 |
92 |
165 |
1054 |
4736 |
25861 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
304 |
23 |
30 |
1 |
0 |
0 |
0 |
| OW |
0 |
117 |
28 |
21 |
9 |
0 |
0 |
0 |
| VODI |
0 |
110 |
11 |
52 |
24 |
0 |
0 |
0 |
| ODI |
0 |
27 |
16 |
14 |
39 |
10 |
0 |
0 |
| CDI |
0 |
16 |
13 |
61 |
108 |
116 |
8 |
0 |
| VCDI |
0 |
5 |
13 |
88 |
171 |
1065 |
4734 |
25862 |
|
Date: 2025-03-01:
| 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 |
0 |
251 |
19 |
22 |
0 |
0 |
0 |
0 |
| OW |
0 |
101 |
23 |
33 |
7 |
0 |
0 |
0 |
| VODI |
0 |
72 |
37 |
76 |
24 |
3 |
2 |
0 |
| ODI |
0 |
49 |
4 |
33 |
27 |
11 |
9 |
0 |
| CDI |
0 |
27 |
12 |
24 |
95 |
111 |
24 |
6 |
| VCDI |
0 |
9 |
17 |
82 |
143 |
785 |
4932 |
26026 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
255 |
20 |
22 |
0 |
0 |
0 |
0 |
| OW |
0 |
97 |
23 |
30 |
7 |
0 |
0 |
0 |
| VODI |
0 |
75 |
35 |
71 |
17 |
1 |
0 |
0 |
| ODI |
0 |
51 |
4 |
31 |
28 |
12 |
7 |
0 |
| CDI |
0 |
24 |
14 |
33 |
88 |
107 |
21 |
5 |
| VCDI |
0 |
7 |
16 |
83 |
156 |
790 |
4939 |
26027 |
|
Date: 2025-03-03:
| 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 |
0 |
283 |
19 |
22 |
1 |
0 |
0 |
0 |
| OW |
0 |
129 |
21 |
22 |
9 |
0 |
0 |
0 |
| VODI |
0 |
84 |
20 |
100 |
38 |
0 |
0 |
0 |
| ODI |
0 |
10 |
7 |
24 |
58 |
1 |
0 |
0 |
| CDI |
0 |
6 |
8 |
15 |
84 |
46 |
1 |
2 |
| VCDI |
0 |
0 |
7 |
59 |
154 |
530 |
5228 |
26108 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
221 |
19 |
19 |
0 |
0 |
0 |
0 |
| OW |
0 |
105 |
7 |
30 |
11 |
0 |
0 |
0 |
| VODI |
0 |
83 |
22 |
69 |
38 |
0 |
0 |
0 |
| ODI |
0 |
46 |
5 |
19 |
29 |
9 |
0 |
0 |
| CDI |
0 |
28 |
7 |
21 |
75 |
48 |
29 |
3 |
| VCDI |
0 |
29 |
22 |
84 |
191 |
520 |
5200 |
26107 |
|
Date: 2025-03-05:
| 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 |
0 |
268 |
15 |
8 |
0 |
0 |
0 |
0 |
| OW |
0 |
101 |
13 |
27 |
3 |
0 |
0 |
0 |
| VODI |
0 |
98 |
20 |
68 |
24 |
1 |
0 |
0 |
| ODI |
0 |
52 |
6 |
35 |
34 |
16 |
0 |
0 |
| CDI |
0 |
20 |
2 |
14 |
63 |
32 |
15 |
0 |
| VCDI |
0 |
21 |
21 |
77 |
160 |
382 |
4346 |
27154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
204 |
14 |
7 |
0 |
0 |
0 |
0 |
| OW |
0 |
128 |
15 |
33 |
3 |
0 |
0 |
0 |
| VODI |
0 |
106 |
15 |
55 |
28 |
10 |
0 |
0 |
| ODI |
0 |
43 |
6 |
28 |
46 |
18 |
6 |
0 |
| CDI |
0 |
28 |
4 |
25 |
65 |
31 |
43 |
7 |
| VCDI |
0 |
51 |
23 |
81 |
142 |
372 |
4312 |
27147 |
|
Date: 2025-03-07:
| 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 |
0 |
201 |
11 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
143 |
17 |
17 |
5 |
0 |
0 |
0 |
| VODI |
0 |
136 |
14 |
60 |
16 |
0 |
0 |
0 |
| ODI |
0 |
50 |
7 |
31 |
30 |
8 |
0 |
0 |
| CDI |
0 |
28 |
3 |
14 |
66 |
37 |
7 |
15 |
| VCDI |
0 |
53 |
28 |
84 |
116 |
389 |
4638 |
26856 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
195 |
17 |
8 |
0 |
0 |
0 |
0 |
| OW |
0 |
150 |
11 |
21 |
4 |
0 |
0 |
0 |
| VODI |
0 |
117 |
9 |
68 |
30 |
3 |
6 |
0 |
| ODI |
0 |
41 |
7 |
26 |
52 |
25 |
14 |
4 |
| CDI |
0 |
36 |
7 |
11 |
57 |
75 |
74 |
17 |
| VCDI |
0 |
72 |
29 |
88 |
90 |
331 |
4551 |
26850 |
|
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