Validation of sea ice concentration - Asian sector
Bulletin date: 2025-04-10
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-04-06:
| 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 |
251 |
38 |
9 |
0 |
0 |
0 |
0 |
| OW |
0 |
151 |
29 |
49 |
0 |
0 |
0 |
0 |
| VODI |
0 |
82 |
24 |
82 |
22 |
19 |
0 |
0 |
| ODI |
0 |
23 |
22 |
58 |
56 |
65 |
5 |
7 |
| CDI |
0 |
5 |
5 |
84 |
155 |
326 |
70 |
40 |
| VCDI |
0 |
0 |
0 |
32 |
107 |
376 |
4750 |
26154 |
|
...date precedes bulletin
|
Date: 2025-04-08:
| 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 |
263 |
40 |
45 |
0 |
0 |
0 |
0 |
| OW |
0 |
79 |
29 |
94 |
1 |
0 |
0 |
0 |
| VODI |
0 |
10 |
15 |
99 |
45 |
0 |
0 |
0 |
| ODI |
0 |
0 |
1 |
33 |
59 |
4 |
0 |
1 |
| CDI |
0 |
0 |
0 |
13 |
143 |
238 |
73 |
36 |
| VCDI |
0 |
0 |
0 |
0 |
35 |
445 |
5238 |
26057 |
|
...date precedes bulletin
|
Date: 2025-04-10:
| 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 |
261 |
30 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
106 |
40 |
63 |
1 |
0 |
0 |
0 |
| VODI |
0 |
62 |
24 |
96 |
23 |
0 |
0 |
0 |
| ODI |
0 |
16 |
12 |
75 |
24 |
7 |
0 |
0 |
| CDI |
0 |
5 |
14 |
135 |
147 |
60 |
8 |
1 |
| VCDI |
0 |
0 |
0 |
38 |
210 |
869 |
6412 |
24333 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
251 |
24 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
123 |
45 |
61 |
2 |
0 |
0 |
0 |
| VODI |
0 |
58 |
25 |
97 |
28 |
0 |
0 |
0 |
| ODI |
0 |
14 |
15 |
90 |
26 |
5 |
0 |
0 |
| CDI |
0 |
4 |
11 |
133 |
160 |
92 |
9 |
4 |
| VCDI |
0 |
0 |
0 |
27 |
189 |
839 |
6411 |
24330 |
|
Date: 2025-04-12:
| 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 |
254 |
40 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
142 |
29 |
84 |
0 |
0 |
0 |
0 |
| VODI |
0 |
65 |
16 |
90 |
18 |
0 |
0 |
0 |
| ODI |
0 |
35 |
7 |
34 |
48 |
27 |
0 |
5 |
| CDI |
0 |
25 |
17 |
39 |
164 |
207 |
25 |
50 |
| VCDI |
0 |
1 |
12 |
84 |
212 |
1273 |
8214 |
21855 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
241 |
37 |
30 |
0 |
0 |
0 |
0 |
| OW |
0 |
158 |
32 |
92 |
2 |
0 |
0 |
0 |
| VODI |
0 |
66 |
15 |
78 |
19 |
3 |
0 |
0 |
| ODI |
0 |
37 |
14 |
32 |
45 |
35 |
2 |
8 |
| CDI |
0 |
15 |
12 |
36 |
169 |
242 |
65 |
51 |
| VCDI |
0 |
5 |
11 |
87 |
207 |
1227 |
8172 |
21851 |
|
Date: 2025-04-14:
| 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 |
261 |
41 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
127 |
21 |
92 |
2 |
0 |
0 |
0 |
| VODI |
0 |
61 |
16 |
69 |
31 |
0 |
0 |
0 |
| ODI |
0 |
51 |
5 |
20 |
68 |
4 |
2 |
23 |
| CDI |
0 |
18 |
25 |
51 |
201 |
218 |
78 |
113 |
| VCDI |
0 |
0 |
9 |
67 |
121 |
956 |
8588 |
21733 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
259 |
36 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
21 |
88 |
7 |
0 |
0 |
0 |
| VODI |
0 |
73 |
22 |
61 |
30 |
2 |
0 |
1 |
| ODI |
0 |
28 |
20 |
38 |
70 |
16 |
7 |
23 |
| CDI |
0 |
6 |
16 |
45 |
199 |
210 |
167 |
100 |
| VCDI |
0 |
0 |
2 |
68 |
117 |
950 |
8494 |
21745 |
|
Date: 2025-04-16:
| 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 |
319 |
39 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
127 |
28 |
78 |
1 |
0 |
0 |
0 |
| VODI |
0 |
40 |
18 |
82 |
8 |
3 |
0 |
0 |
| ODI |
0 |
8 |
11 |
62 |
41 |
19 |
21 |
0 |
| CDI |
0 |
0 |
0 |
52 |
266 |
379 |
377 |
60 |
| VCDI |
0 |
0 |
0 |
0 |
66 |
881 |
9997 |
20089 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
235 |
36 |
26 |
0 |
0 |
0 |
0 |
| OW |
0 |
143 |
15 |
79 |
1 |
0 |
0 |
0 |
| VODI |
0 |
103 |
27 |
64 |
14 |
5 |
4 |
0 |
| ODI |
0 |
13 |
17 |
54 |
61 |
44 |
32 |
7 |
| CDI |
0 |
0 |
1 |
71 |
185 |
278 |
310 |
64 |
| VCDI |
0 |
0 |
0 |
4 |
121 |
955 |
10049 |
20078 |
|
Date: 2025-04-18:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
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