Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-06
Data source: OSI SAF N.H. AMSR 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 |
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 |
|
...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 |
201 |
8 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
115 |
4 |
17 |
9 |
0 |
0 |
0 |
| VODI |
0 |
98 |
19 |
31 |
33 |
0 |
0 |
0 |
| ODI |
0 |
59 |
9 |
10 |
13 |
6 |
2 |
0 |
| CDI |
0 |
48 |
10 |
18 |
27 |
47 |
21 |
1 |
| VCDI |
0 |
47 |
21 |
81 |
89 |
820 |
5577 |
24640 |
|
...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 |
243 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
109 |
10 |
6 |
1 |
0 |
0 |
0 |
| VODI |
0 |
118 |
21 |
37 |
23 |
1 |
0 |
0 |
| ODI |
0 |
47 |
5 |
18 |
19 |
13 |
0 |
0 |
| CDI |
0 |
19 |
5 |
15 |
33 |
66 |
6 |
2 |
| VCDI |
0 |
48 |
18 |
64 |
103 |
404 |
5180 |
25446 |
|
...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 |
188 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
129 |
15 |
4 |
0 |
0 |
0 |
0 |
| VODI |
0 |
138 |
5 |
38 |
8 |
4 |
0 |
0 |
| ODI |
0 |
63 |
10 |
17 |
15 |
16 |
2 |
0 |
| CDI |
0 |
31 |
4 |
13 |
20 |
26 |
18 |
0 |
| VCDI |
0 |
58 |
34 |
89 |
101 |
413 |
7524 |
23097 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
195 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
131 |
15 |
5 |
0 |
0 |
0 |
0 |
| VODI |
0 |
121 |
6 |
39 |
6 |
5 |
0 |
0 |
| ODI |
0 |
63 |
8 |
14 |
22 |
16 |
2 |
0 |
| CDI |
0 |
34 |
4 |
14 |
15 |
23 |
19 |
0 |
| VCDI |
0 |
63 |
35 |
89 |
101 |
415 |
7523 |
23097 |
|
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 |
149 |
4 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
163 |
10 |
1 |
0 |
0 |
0 |
0 |
| VODI |
0 |
138 |
12 |
37 |
6 |
0 |
0 |
0 |
| ODI |
0 |
48 |
10 |
30 |
11 |
5 |
3 |
0 |
| CDI |
0 |
36 |
16 |
30 |
17 |
24 |
35 |
35 |
| VCDI |
0 |
13 |
12 |
125 |
77 |
196 |
8276 |
22563 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
166 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
10 |
3 |
0 |
0 |
0 |
0 |
| VODI |
0 |
124 |
13 |
34 |
5 |
0 |
0 |
0 |
| ODI |
0 |
43 |
9 |
26 |
10 |
5 |
3 |
0 |
| CDI |
0 |
39 |
14 |
49 |
22 |
27 |
34 |
36 |
| VCDI |
0 |
23 |
15 |
111 |
74 |
193 |
8277 |
22562 |
|
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 |
243 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
181 |
19 |
7 |
0 |
0 |
0 |
0 |
| VODI |
0 |
87 |
20 |
35 |
19 |
1 |
0 |
0 |
| ODI |
0 |
26 |
8 |
24 |
14 |
8 |
2 |
0 |
| CDI |
0 |
9 |
8 |
33 |
34 |
34 |
37 |
17 |
| VCDI |
0 |
0 |
3 |
12 |
44 |
152 |
3610 |
27395 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
207 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
124 |
6 |
5 |
0 |
0 |
0 |
0 |
| VODI |
0 |
74 |
19 |
20 |
6 |
0 |
0 |
0 |
| ODI |
0 |
63 |
10 |
26 |
19 |
8 |
1 |
0 |
| CDI |
0 |
58 |
11 |
31 |
29 |
28 |
48 |
16 |
| VCDI |
0 |
20 |
10 |
29 |
57 |
159 |
3600 |
27396 |
|
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 |
240 |
0 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
132 |
10 |
8 |
2 |
0 |
0 |
0 |
| VODI |
0 |
95 |
7 |
21 |
15 |
0 |
0 |
0 |
| ODI |
0 |
54 |
9 |
12 |
7 |
0 |
0 |
0 |
| CDI |
0 |
28 |
18 |
39 |
36 |
32 |
39 |
51 |
| VCDI |
0 |
2 |
1 |
18 |
59 |
252 |
8393 |
22501 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
198 |
4 |
6 |
1 |
0 |
0 |
0 |
| OW |
0 |
120 |
3 |
5 |
4 |
0 |
0 |
0 |
| VODI |
0 |
120 |
8 |
12 |
11 |
0 |
1 |
0 |
| ODI |
0 |
70 |
12 |
24 |
15 |
12 |
13 |
0 |
| CDI |
0 |
24 |
9 |
23 |
29 |
27 |
58 |
59 |
| VCDI |
0 |
19 |
9 |
29 |
59 |
245 |
8360 |
22493 |
|
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 |
245 |
5 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
114 |
7 |
12 |
2 |
0 |
0 |
0 |
| VODI |
0 |
75 |
9 |
14 |
10 |
0 |
0 |
0 |
| ODI |
0 |
42 |
15 |
12 |
11 |
8 |
2 |
0 |
| CDI |
0 |
41 |
7 |
30 |
32 |
52 |
67 |
0 |
| VCDI |
0 |
50 |
23 |
49 |
121 |
420 |
12588 |
18019 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
173 |
5 |
3 |
1 |
0 |
0 |
0 |
| OW |
0 |
122 |
12 |
10 |
4 |
0 |
0 |
0 |
| VODI |
0 |
109 |
14 |
26 |
12 |
0 |
7 |
0 |
| ODI |
0 |
53 |
6 |
13 |
26 |
8 |
17 |
0 |
| CDI |
0 |
44 |
11 |
14 |
34 |
92 |
152 |
16 |
| VCDI |
0 |
66 |
18 |
51 |
99 |
380 |
12481 |
18003 |
|
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