Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-27
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-21:
| 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 |
198 |
17 |
37 |
1 |
0 |
0 |
0 |
| OW |
0 |
64 |
14 |
48 |
6 |
0 |
0 |
0 |
| VODI |
0 |
30 |
7 |
44 |
40 |
0 |
0 |
0 |
| ODI |
0 |
10 |
11 |
32 |
62 |
23 |
3 |
2 |
| CDI |
0 |
0 |
1 |
36 |
80 |
210 |
132 |
8 |
| VCDI |
0 |
0 |
0 |
12 |
106 |
830 |
10120 |
20912 |
|
...date precedes bulletin
|
Date: 2025-03-23:
| 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 |
172 |
19 |
21 |
1 |
0 |
0 |
0 |
| OW |
0 |
70 |
6 |
39 |
8 |
0 |
0 |
0 |
| VODI |
0 |
46 |
7 |
38 |
51 |
0 |
0 |
0 |
| ODI |
0 |
14 |
10 |
28 |
45 |
19 |
4 |
13 |
| CDI |
0 |
1 |
4 |
48 |
81 |
95 |
61 |
52 |
| VCDI |
0 |
0 |
0 |
35 |
79 |
400 |
8615 |
23014 |
|
...date precedes bulletin
|
Date: 2025-03-25:
| 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 |
0 |
284 |
20 |
8 |
0 |
0 |
0 |
0 |
| OW |
0 |
124 |
23 |
42 |
0 |
0 |
0 |
0 |
| VODI |
0 |
59 |
24 |
91 |
19 |
0 |
0 |
0 |
| ODI |
0 |
17 |
5 |
38 |
30 |
6 |
2 |
2 |
| CDI |
0 |
2 |
9 |
51 |
72 |
59 |
31 |
10 |
| VCDI |
0 |
0 |
0 |
60 |
165 |
513 |
7434 |
23896 |
|
...date precedes bulletin
|
Date: 2025-03-27:
| 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 |
327 |
4 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
190 |
7 |
11 |
4 |
0 |
0 |
0 |
| VODI |
0 |
177 |
23 |
33 |
28 |
3 |
0 |
0 |
| ODI |
0 |
56 |
22 |
49 |
52 |
13 |
0 |
0 |
| CDI |
0 |
28 |
30 |
58 |
112 |
95 |
8 |
26 |
| VCDI |
0 |
16 |
20 |
136 |
268 |
1109 |
7090 |
23100 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
320 |
4 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
189 |
7 |
13 |
4 |
0 |
0 |
0 |
| VODI |
0 |
182 |
23 |
35 |
30 |
3 |
0 |
0 |
| ODI |
0 |
61 |
25 |
43 |
45 |
14 |
0 |
0 |
| CDI |
0 |
26 |
32 |
66 |
126 |
103 |
10 |
38 |
| VCDI |
0 |
16 |
15 |
130 |
259 |
1100 |
7088 |
23088 |
|
Date: 2025-03-29:
| 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 |
2 |
335 |
3 |
4 |
0 |
0 |
0 |
0 |
| OW |
8 |
254 |
8 |
20 |
0 |
0 |
0 |
0 |
| VODI |
7 |
188 |
27 |
55 |
19 |
3 |
0 |
0 |
| ODI |
0 |
80 |
12 |
69 |
29 |
9 |
12 |
2 |
| CDI |
0 |
50 |
33 |
78 |
176 |
133 |
48 |
28 |
| VCDI |
0 |
6 |
18 |
135 |
307 |
1717 |
6898 |
22323 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1 |
339 |
2 |
6 |
0 |
0 |
0 |
0 |
| OW |
6 |
252 |
6 |
21 |
1 |
0 |
0 |
0 |
| VODI |
10 |
182 |
30 |
53 |
21 |
3 |
0 |
0 |
| ODI |
0 |
82 |
18 |
69 |
26 |
11 |
13 |
2 |
| CDI |
0 |
55 |
34 |
100 |
173 |
162 |
50 |
26 |
| VCDI |
0 |
3 |
11 |
112 |
310 |
1686 |
6895 |
22325 |
|
Date: 2025-03-31:
| 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 |
413 |
2 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
283 |
23 |
14 |
1 |
0 |
0 |
0 |
| VODI |
0 |
87 |
54 |
96 |
9 |
0 |
0 |
0 |
| ODI |
0 |
10 |
13 |
111 |
47 |
23 |
1 |
5 |
| CDI |
0 |
1 |
0 |
93 |
331 |
360 |
52 |
23 |
| VCDI |
0 |
0 |
0 |
0 |
126 |
2019 |
9083 |
19815 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
314 |
1 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
215 |
11 |
6 |
3 |
0 |
0 |
0 |
| VODI |
0 |
167 |
29 |
49 |
16 |
3 |
0 |
0 |
| ODI |
0 |
71 |
33 |
83 |
40 |
27 |
2 |
3 |
| CDI |
0 |
27 |
18 |
162 |
281 |
341 |
106 |
20 |
| VCDI |
0 |
0 |
0 |
13 |
174 |
2031 |
9028 |
19820 |
|
Date: 2025-04-02:
| 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 |
365 |
19 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
158 |
11 |
33 |
7 |
12 |
0 |
0 |
| VODI |
0 |
68 |
31 |
83 |
29 |
53 |
0 |
0 |
| ODI |
0 |
24 |
13 |
61 |
37 |
49 |
0 |
4 |
| CDI |
0 |
2 |
3 |
72 |
173 |
304 |
79 |
14 |
| VCDI |
0 |
0 |
0 |
0 |
61 |
643 |
7846 |
22830 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
231 |
16 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
127 |
4 |
25 |
1 |
3 |
0 |
0 |
| VODI |
0 |
138 |
9 |
28 |
14 |
40 |
0 |
0 |
| ODI |
0 |
89 |
31 |
51 |
33 |
57 |
5 |
3 |
| CDI |
0 |
32 |
17 |
130 |
180 |
282 |
93 |
31 |
| VCDI |
0 |
0 |
0 |
3 |
79 |
679 |
7827 |
22814 |
|
Date: 2025-04-04:
| 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 |
359 |
16 |
20 |
0 |
0 |
0 |
0 |
| OW |
0 |
160 |
21 |
33 |
7 |
0 |
0 |
0 |
| VODI |
0 |
86 |
13 |
88 |
93 |
10 |
0 |
0 |
| ODI |
0 |
27 |
23 |
66 |
66 |
28 |
2 |
0 |
| CDI |
0 |
4 |
13 |
98 |
180 |
208 |
45 |
5 |
| VCDI |
0 |
0 |
0 |
34 |
151 |
753 |
6978 |
23509 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
187 |
16 |
25 |
0 |
0 |
0 |
0 |
| OW |
0 |
111 |
2 |
22 |
1 |
0 |
0 |
0 |
| VODI |
0 |
122 |
1 |
23 |
11 |
5 |
0 |
0 |
| ODI |
0 |
118 |
15 |
39 |
36 |
27 |
9 |
9 |
| CDI |
0 |
97 |
40 |
150 |
198 |
121 |
81 |
29 |
| VCDI |
0 |
1 |
12 |
80 |
251 |
846 |
6935 |
23476 |
|
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