Validation of sea ice concentration - Asian sector
Bulletin date: 2025-02-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-02-14:
| 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 |
237 |
8 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
72 |
8 |
13 |
6 |
0 |
0 |
0 |
| VODI |
0 |
60 |
7 |
12 |
32 |
13 |
0 |
0 |
| ODI |
0 |
38 |
16 |
33 |
35 |
42 |
1 |
0 |
| CDI |
0 |
19 |
17 |
59 |
127 |
323 |
126 |
5 |
| VCDI |
0 |
0 |
0 |
6 |
62 |
1167 |
13288 |
16249 |
|
...date precedes bulletin
|
Date: 2025-02-16:
| 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 |
183 |
13 |
13 |
1 |
0 |
0 |
0 |
| OW |
0 |
85 |
16 |
14 |
12 |
0 |
0 |
0 |
| VODI |
0 |
50 |
4 |
9 |
10 |
22 |
0 |
0 |
| ODI |
0 |
29 |
14 |
15 |
14 |
45 |
10 |
1 |
| CDI |
0 |
11 |
13 |
40 |
54 |
135 |
89 |
19 |
| VCDI |
0 |
1 |
3 |
24 |
58 |
538 |
11329 |
19208 |
|
...date precedes bulletin
|
Date: 2025-02-18:
| 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 |
199 |
6 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
126 |
4 |
16 |
5 |
0 |
0 |
0 |
| VODI |
0 |
74 |
11 |
28 |
10 |
0 |
0 |
0 |
| ODI |
0 |
18 |
9 |
13 |
26 |
9 |
2 |
0 |
| CDI |
0 |
8 |
11 |
16 |
41 |
91 |
56 |
1 |
| VCDI |
0 |
10 |
8 |
31 |
76 |
503 |
8820 |
21844 |
|
...date precedes bulletin
|
Date: 2025-02-20:
| 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 |
184 |
11 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
128 |
7 |
19 |
13 |
0 |
0 |
0 |
| VODI |
0 |
62 |
19 |
21 |
13 |
1 |
0 |
0 |
| ODI |
0 |
27 |
4 |
17 |
15 |
9 |
9 |
0 |
| CDI |
0 |
31 |
7 |
15 |
27 |
56 |
99 |
3 |
| VCDI |
0 |
6 |
19 |
42 |
55 |
493 |
9745 |
20902 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
191 |
13 |
23 |
0 |
0 |
0 |
0 |
| OW |
0 |
123 |
5 |
20 |
14 |
0 |
0 |
0 |
| VODI |
0 |
61 |
18 |
19 |
13 |
2 |
1 |
0 |
| ODI |
0 |
31 |
6 |
14 |
12 |
8 |
12 |
0 |
| CDI |
0 |
25 |
8 |
21 |
26 |
51 |
109 |
3 |
| VCDI |
0 |
7 |
17 |
40 |
58 |
498 |
9731 |
20902 |
|
Date: 2025-02-22:
| 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 |
0 |
0 |
0 |
0 |
| OW |
0 |
91 |
12 |
29 |
9 |
0 |
0 |
0 |
| VODI |
0 |
28 |
18 |
27 |
8 |
1 |
0 |
0 |
| ODI |
0 |
12 |
8 |
32 |
12 |
16 |
0 |
0 |
| CDI |
0 |
13 |
7 |
48 |
35 |
103 |
31 |
23 |
| VCDI |
0 |
3 |
4 |
26 |
54 |
325 |
7979 |
22895 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
191 |
18 |
35 |
0 |
0 |
0 |
0 |
| OW |
0 |
86 |
11 |
31 |
11 |
0 |
0 |
0 |
| VODI |
0 |
28 |
19 |
26 |
7 |
2 |
0 |
0 |
| ODI |
0 |
14 |
7 |
32 |
7 |
17 |
0 |
0 |
| CDI |
0 |
12 |
8 |
41 |
30 |
91 |
43 |
24 |
| VCDI |
0 |
0 |
4 |
28 |
63 |
335 |
7967 |
22894 |
|
Date: 2025-02-24:
| 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 |
1 |
329 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
162 |
0 |
1 |
0 |
0 |
0 |
0 |
| VODI |
0 |
93 |
12 |
9 |
3 |
0 |
0 |
0 |
| ODI |
0 |
34 |
20 |
37 |
14 |
4 |
0 |
0 |
| CDI |
0 |
23 |
8 |
49 |
128 |
189 |
16 |
24 |
| VCDI |
0 |
25 |
15 |
41 |
177 |
923 |
8968 |
20777 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1 |
340 |
0 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
68 |
1 |
3 |
1 |
0 |
0 |
0 |
| VODI |
0 |
58 |
10 |
7 |
5 |
0 |
0 |
0 |
| ODI |
0 |
51 |
11 |
38 |
14 |
4 |
0 |
0 |
| CDI |
0 |
92 |
9 |
31 |
94 |
138 |
14 |
19 |
| VCDI |
0 |
57 |
24 |
56 |
208 |
974 |
8970 |
20782 |
|
Date: 2025-02-26:
| 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 |
299 |
7 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
172 |
2 |
3 |
0 |
0 |
0 |
0 |
| VODI |
0 |
102 |
22 |
20 |
1 |
0 |
0 |
0 |
| ODI |
0 |
41 |
4 |
24 |
18 |
3 |
0 |
0 |
| CDI |
0 |
42 |
15 |
17 |
114 |
104 |
24 |
10 |
| VCDI |
0 |
54 |
38 |
78 |
96 |
1226 |
9987 |
19559 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
288 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
107 |
7 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
91 |
19 |
25 |
2 |
0 |
0 |
0 |
| ODI |
0 |
52 |
5 |
22 |
27 |
3 |
0 |
0 |
| CDI |
0 |
54 |
5 |
14 |
109 |
128 |
29 |
7 |
| VCDI |
0 |
118 |
49 |
81 |
91 |
1202 |
9982 |
19562 |
|
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 |
235 |
11 |
7 |
1 |
0 |
0 |
0 |
| OW |
0 |
131 |
7 |
11 |
7 |
0 |
0 |
0 |
| VODI |
0 |
113 |
27 |
27 |
8 |
9 |
0 |
0 |
| ODI |
0 |
52 |
4 |
22 |
13 |
23 |
0 |
0 |
| CDI |
0 |
51 |
10 |
28 |
60 |
106 |
8 |
4 |
| VCDI |
0 |
32 |
27 |
84 |
110 |
927 |
6684 |
23243 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
254 |
12 |
7 |
0 |
0 |
0 |
0 |
| OW |
0 |
116 |
4 |
17 |
9 |
4 |
0 |
0 |
| VODI |
0 |
110 |
29 |
24 |
15 |
30 |
0 |
0 |
| ODI |
0 |
57 |
9 |
17 |
24 |
34 |
0 |
0 |
| CDI |
0 |
36 |
9 |
36 |
52 |
119 |
18 |
0 |
| VCDI |
0 |
41 |
23 |
78 |
99 |
878 |
6674 |
23247 |
|
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