Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-03-16:
| 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 |
189 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
112 |
14 |
5 |
0 |
0 |
0 |
0 |
| VODI |
0 |
76 |
19 |
27 |
6 |
0 |
0 |
0 |
| ODI |
0 |
31 |
4 |
38 |
24 |
4 |
7 |
0 |
| CDI |
0 |
26 |
8 |
27 |
69 |
99 |
83 |
13 |
| VCDI |
0 |
30 |
17 |
42 |
169 |
1173 |
13263 |
16507 |
|
...date precedes bulletin
|
Date: 2025-03-18:
| 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 |
208 |
3 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
94 |
11 |
10 |
0 |
0 |
0 |
0 |
| VODI |
0 |
38 |
18 |
41 |
20 |
0 |
0 |
0 |
| ODI |
0 |
22 |
5 |
20 |
38 |
36 |
6 |
0 |
| CDI |
0 |
6 |
7 |
22 |
110 |
205 |
137 |
30 |
| VCDI |
0 |
0 |
0 |
14 |
206 |
1099 |
13840 |
15835 |
|
...date precedes bulletin
|
Date: 2025-03-20:
| 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 |
172 |
12 |
14 |
1 |
0 |
0 |
0 |
| OW |
0 |
78 |
7 |
12 |
6 |
0 |
0 |
0 |
| VODI |
0 |
39 |
16 |
27 |
23 |
1 |
0 |
0 |
| ODI |
0 |
22 |
11 |
25 |
29 |
30 |
5 |
3 |
| CDI |
0 |
2 |
5 |
33 |
100 |
184 |
128 |
8 |
| VCDI |
0 |
3 |
6 |
19 |
116 |
858 |
14065 |
16022 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
165 |
12 |
14 |
1 |
0 |
0 |
0 |
| OW |
0 |
82 |
7 |
11 |
5 |
0 |
0 |
0 |
| VODI |
0 |
43 |
16 |
27 |
17 |
0 |
0 |
0 |
| ODI |
0 |
20 |
12 |
27 |
37 |
32 |
7 |
3 |
| CDI |
0 |
4 |
6 |
36 |
104 |
194 |
151 |
12 |
| VCDI |
0 |
2 |
4 |
15 |
111 |
847 |
14040 |
16018 |
|
Date: 2025-03-22:
| 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 |
149 |
9 |
12 |
3 |
0 |
0 |
0 |
| OW |
0 |
79 |
7 |
11 |
6 |
0 |
0 |
0 |
| VODI |
0 |
48 |
8 |
19 |
27 |
4 |
0 |
0 |
| ODI |
0 |
21 |
14 |
23 |
19 |
30 |
17 |
2 |
| CDI |
0 |
7 |
14 |
36 |
49 |
133 |
143 |
8 |
| VCDI |
0 |
10 |
14 |
33 |
52 |
532 |
11603 |
18940 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
131 |
9 |
9 |
2 |
0 |
0 |
0 |
| OW |
0 |
92 |
7 |
11 |
6 |
0 |
0 |
0 |
| VODI |
0 |
54 |
8 |
23 |
20 |
2 |
0 |
0 |
| ODI |
0 |
21 |
15 |
24 |
28 |
33 |
25 |
2 |
| CDI |
0 |
7 |
14 |
41 |
58 |
150 |
166 |
10 |
| VCDI |
0 |
9 |
13 |
26 |
42 |
514 |
11572 |
18938 |
|
Date: 2025-03-24:
| 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 |
0 |
195 |
7 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
138 |
15 |
18 |
2 |
0 |
0 |
0 |
| VODI |
0 |
59 |
20 |
34 |
30 |
4 |
0 |
0 |
| ODI |
0 |
17 |
13 |
16 |
17 |
11 |
2 |
0 |
| CDI |
0 |
8 |
15 |
37 |
29 |
60 |
22 |
5 |
| VCDI |
0 |
15 |
9 |
42 |
102 |
405 |
10627 |
20107 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
115 |
7 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
112 |
10 |
11 |
0 |
0 |
0 |
0 |
| VODI |
0 |
90 |
14 |
32 |
11 |
0 |
0 |
0 |
| ODI |
0 |
41 |
6 |
17 |
33 |
9 |
1 |
0 |
| CDI |
0 |
36 |
15 |
25 |
42 |
46 |
29 |
2 |
| VCDI |
0 |
38 |
27 |
63 |
94 |
425 |
10621 |
20110 |
|
Date: 2025-03-26:
| 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 |
237 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
160 |
8 |
2 |
0 |
0 |
0 |
0 |
| VODI |
0 |
136 |
18 |
30 |
6 |
0 |
0 |
0 |
| ODI |
0 |
48 |
10 |
45 |
15 |
6 |
0 |
0 |
| CDI |
0 |
51 |
12 |
49 |
76 |
39 |
8 |
0 |
| VCDI |
0 |
58 |
32 |
83 |
152 |
800 |
10590 |
19411 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
123 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
152 |
2 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
152 |
17 |
24 |
4 |
0 |
0 |
0 |
| ODI |
0 |
63 |
13 |
44 |
28 |
5 |
0 |
0 |
| CDI |
0 |
80 |
9 |
37 |
62 |
86 |
39 |
1 |
| VCDI |
0 |
120 |
39 |
104 |
155 |
754 |
10559 |
19410 |
|
Date: 2025-03-28:
| 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 |
3 |
259 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
4 |
217 |
4 |
1 |
0 |
0 |
0 |
0 |
| VODI |
0 |
200 |
13 |
22 |
7 |
1 |
0 |
0 |
| ODI |
0 |
92 |
20 |
20 |
24 |
7 |
20 |
0 |
| CDI |
0 |
84 |
27 |
67 |
72 |
107 |
63 |
3 |
| VCDI |
0 |
103 |
32 |
106 |
188 |
1121 |
9147 |
20048 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
7 |
134 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
169 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
197 |
12 |
7 |
3 |
0 |
0 |
0 |
| ODI |
0 |
111 |
22 |
23 |
14 |
9 |
38 |
0 |
| CDI |
0 |
207 |
33 |
80 |
79 |
145 |
153 |
11 |
| VCDI |
0 |
137 |
29 |
106 |
195 |
1082 |
9039 |
20040 |
|
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