Validation of sea ice concentration - Asian sector
Bulletin date: 2025-02-27
Data source: OSI SAF N.H. AMSR 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 |
188 |
12 |
24 |
0 |
0 |
0 |
0 |
| OW |
0 |
126 |
4 |
24 |
8 |
0 |
0 |
0 |
| VODI |
0 |
52 |
18 |
7 |
4 |
5 |
0 |
0 |
| ODI |
0 |
29 |
12 |
9 |
8 |
23 |
1 |
2 |
| CDI |
0 |
26 |
17 |
34 |
18 |
85 |
64 |
13 |
| VCDI |
0 |
1 |
2 |
28 |
68 |
409 |
9808 |
20953 |
|
...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 |
260 |
10 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
116 |
11 |
6 |
2 |
0 |
0 |
0 |
| VODI |
0 |
53 |
9 |
7 |
5 |
1 |
0 |
0 |
| ODI |
0 |
47 |
3 |
22 |
14 |
4 |
0 |
0 |
| CDI |
0 |
60 |
6 |
14 |
78 |
66 |
9 |
32 |
| VCDI |
0 |
43 |
25 |
45 |
86 |
837 |
8626 |
21583 |
|
...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 |
13 |
316 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
187 |
1 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
87 |
6 |
11 |
5 |
1 |
0 |
0 |
| ODI |
0 |
43 |
18 |
28 |
17 |
1 |
0 |
0 |
| CDI |
0 |
33 |
11 |
38 |
156 |
80 |
16 |
11 |
| VCDI |
0 |
66 |
26 |
72 |
210 |
1108 |
10948 |
18573 |
|
...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 |
261 |
11 |
10 |
3 |
0 |
0 |
0 |
| OW |
0 |
138 |
8 |
12 |
4 |
0 |
0 |
0 |
| VODI |
0 |
128 |
8 |
28 |
8 |
2 |
0 |
0 |
| ODI |
0 |
46 |
10 |
14 |
17 |
7 |
2 |
0 |
| CDI |
0 |
36 |
21 |
36 |
54 |
107 |
17 |
1 |
| VCDI |
0 |
33 |
25 |
97 |
101 |
1153 |
7434 |
22250 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
266 |
11 |
10 |
3 |
0 |
0 |
0 |
| OW |
0 |
137 |
8 |
13 |
3 |
0 |
0 |
0 |
| VODI |
0 |
120 |
8 |
29 |
6 |
2 |
0 |
0 |
| ODI |
0 |
47 |
6 |
12 |
22 |
4 |
3 |
0 |
| CDI |
0 |
45 |
25 |
38 |
48 |
97 |
17 |
0 |
| VCDI |
0 |
27 |
25 |
95 |
105 |
1166 |
7433 |
22251 |
|
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 |
227 |
5 |
3 |
0 |
0 |
0 |
0 |
| OW |
0 |
118 |
7 |
18 |
5 |
0 |
0 |
0 |
| VODI |
0 |
93 |
26 |
35 |
25 |
1 |
0 |
0 |
| ODI |
0 |
59 |
8 |
14 |
12 |
15 |
9 |
0 |
| CDI |
0 |
50 |
6 |
18 |
38 |
96 |
35 |
5 |
| VCDI |
0 |
36 |
28 |
75 |
91 |
888 |
5561 |
24475 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
231 |
5 |
4 |
0 |
0 |
0 |
0 |
| OW |
0 |
116 |
5 |
16 |
5 |
0 |
0 |
0 |
| VODI |
0 |
90 |
25 |
34 |
18 |
0 |
0 |
0 |
| ODI |
0 |
61 |
10 |
11 |
12 |
16 |
4 |
0 |
| CDI |
0 |
49 |
8 |
22 |
38 |
91 |
31 |
5 |
| VCDI |
0 |
36 |
27 |
76 |
98 |
893 |
5570 |
24475 |
|
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 |
252 |
5 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
145 |
10 |
10 |
2 |
0 |
0 |
0 |
| VODI |
0 |
118 |
18 |
45 |
30 |
1 |
0 |
0 |
| ODI |
0 |
23 |
6 |
16 |
24 |
13 |
0 |
0 |
| CDI |
0 |
16 |
4 |
24 |
32 |
56 |
6 |
0 |
| VCDI |
0 |
12 |
18 |
57 |
92 |
614 |
5851 |
24582 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
190 |
6 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
109 |
7 |
12 |
6 |
0 |
0 |
0 |
| VODI |
0 |
106 |
10 |
36 |
34 |
1 |
0 |
0 |
| ODI |
0 |
57 |
5 |
6 |
9 |
12 |
5 |
0 |
| CDI |
0 |
42 |
7 |
20 |
27 |
54 |
23 |
1 |
| VCDI |
0 |
62 |
26 |
78 |
104 |
617 |
5829 |
24581 |
|
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 |
217 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
108 |
10 |
8 |
0 |
0 |
0 |
0 |
| VODI |
0 |
127 |
12 |
34 |
16 |
3 |
0 |
0 |
| ODI |
0 |
55 |
13 |
14 |
24 |
21 |
0 |
0 |
| CDI |
0 |
24 |
7 |
15 |
30 |
28 |
11 |
1 |
| VCDI |
0 |
41 |
25 |
80 |
117 |
360 |
6583 |
24097 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
154 |
3 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
141 |
7 |
14 |
3 |
0 |
0 |
0 |
| VODI |
0 |
119 |
12 |
31 |
20 |
14 |
0 |
0 |
| ODI |
0 |
48 |
9 |
10 |
33 |
14 |
4 |
0 |
| CDI |
0 |
34 |
9 |
17 |
38 |
20 |
32 |
0 |
| VCDI |
0 |
76 |
28 |
79 |
93 |
364 |
6558 |
24098 |
|
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 |
164 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
10 |
1 |
0 |
0 |
0 |
0 |
| VODI |
0 |
149 |
11 |
34 |
8 |
0 |
0 |
0 |
| ODI |
0 |
57 |
5 |
16 |
13 |
13 |
1 |
0 |
| CDI |
0 |
36 |
3 |
11 |
24 |
29 |
33 |
5 |
| VCDI |
0 |
76 |
33 |
80 |
52 |
376 |
8837 |
21853 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
167 |
2 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
9 |
7 |
1 |
0 |
0 |
0 |
| VODI |
0 |
122 |
13 |
41 |
19 |
4 |
2 |
0 |
| ODI |
0 |
45 |
2 |
12 |
19 |
23 |
16 |
2 |
| CDI |
0 |
46 |
3 |
5 |
19 |
66 |
68 |
10 |
| VCDI |
0 |
102 |
33 |
77 |
39 |
325 |
8785 |
21846 |
|
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