Validation of sea ice concentration - Asian sector
Bulletin date: 2025-03-13
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
201 |
11 |
16 |
0 |
0 |
0 |
0 |
| OW |
0 |
143 |
17 |
17 |
5 |
0 |
0 |
0 |
| VODI |
0 |
136 |
14 |
60 |
16 |
0 |
0 |
0 |
| ODI |
0 |
50 |
7 |
31 |
30 |
8 |
0 |
0 |
| CDI |
0 |
28 |
3 |
14 |
66 |
37 |
7 |
15 |
| VCDI |
0 |
53 |
28 |
84 |
116 |
389 |
4638 |
26856 |
|
...date precedes bulletin
|
Date: 2025-03-09:
| 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 |
196 |
11 |
27 |
0 |
0 |
0 |
0 |
| OW |
0 |
167 |
18 |
12 |
5 |
0 |
0 |
0 |
| VODI |
0 |
96 |
20 |
42 |
12 |
0 |
0 |
0 |
| ODI |
0 |
47 |
8 |
45 |
25 |
9 |
0 |
0 |
| CDI |
0 |
20 |
30 |
68 |
51 |
29 |
44 |
15 |
| VCDI |
0 |
0 |
2 |
82 |
123 |
193 |
3548 |
28151 |
|
...date precedes bulletin
|
Date: 2025-03-11:
| 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 |
274 |
13 |
15 |
0 |
0 |
0 |
0 |
| OW |
0 |
118 |
27 |
44 |
0 |
0 |
0 |
0 |
| VODI |
0 |
70 |
14 |
70 |
13 |
0 |
0 |
0 |
| ODI |
0 |
17 |
9 |
40 |
26 |
8 |
0 |
0 |
| CDI |
0 |
2 |
3 |
48 |
70 |
45 |
30 |
27 |
| VCDI |
0 |
0 |
0 |
10 |
109 |
211 |
3237 |
28546 |
|
...date precedes bulletin
|
Date: 2025-03-13:
| 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 |
259 |
22 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
96 |
21 |
46 |
0 |
0 |
0 |
0 |
| VODI |
0 |
59 |
4 |
63 |
6 |
0 |
0 |
0 |
| ODI |
0 |
35 |
2 |
40 |
24 |
1 |
0 |
0 |
| CDI |
0 |
15 |
1 |
45 |
97 |
48 |
22 |
44 |
| VCDI |
0 |
2 |
1 |
14 |
98 |
286 |
6248 |
25485 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
264 |
19 |
10 |
0 |
0 |
0 |
0 |
| OW |
0 |
88 |
23 |
46 |
0 |
0 |
0 |
0 |
| VODI |
0 |
62 |
5 |
66 |
7 |
0 |
0 |
0 |
| ODI |
0 |
34 |
1 |
36 |
25 |
2 |
0 |
0 |
| CDI |
0 |
16 |
2 |
47 |
86 |
44 |
22 |
42 |
| VCDI |
0 |
2 |
1 |
15 |
107 |
289 |
6248 |
25487 |
|
Date: 2025-03-15:
| 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 |
253 |
20 |
11 |
0 |
0 |
0 |
0 |
| OW |
0 |
106 |
14 |
31 |
1 |
0 |
0 |
0 |
| VODI |
0 |
77 |
16 |
36 |
10 |
0 |
0 |
0 |
| ODI |
0 |
36 |
7 |
44 |
25 |
2 |
1 |
6 |
| CDI |
0 |
28 |
4 |
31 |
60 |
74 |
38 |
43 |
| VCDI |
0 |
44 |
25 |
77 |
119 |
524 |
8866 |
22467 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
260 |
16 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
100 |
19 |
30 |
2 |
0 |
0 |
0 |
| VODI |
0 |
76 |
16 |
32 |
9 |
0 |
0 |
0 |
| ODI |
0 |
38 |
7 |
48 |
24 |
3 |
7 |
2 |
| CDI |
0 |
27 |
4 |
30 |
60 |
76 |
54 |
47 |
| VCDI |
0 |
43 |
24 |
78 |
120 |
521 |
8844 |
22467 |
|
Date: 2025-03-17:
| 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 |
255 |
16 |
9 |
0 |
0 |
0 |
0 |
| OW |
0 |
121 |
25 |
22 |
0 |
0 |
0 |
0 |
| VODI |
0 |
28 |
11 |
87 |
31 |
1 |
0 |
0 |
| ODI |
0 |
15 |
9 |
29 |
65 |
33 |
0 |
1 |
| CDI |
0 |
1 |
2 |
20 |
113 |
213 |
94 |
18 |
| VCDI |
0 |
0 |
0 |
1 |
105 |
1534 |
12065 |
18172 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
217 |
13 |
11 |
0 |
0 |
0 |
0 |
| OW |
0 |
97 |
20 |
15 |
0 |
0 |
0 |
0 |
| VODI |
0 |
56 |
14 |
54 |
7 |
1 |
0 |
0 |
| ODI |
0 |
31 |
3 |
36 |
42 |
27 |
7 |
1 |
| CDI |
0 |
19 |
11 |
31 |
98 |
150 |
148 |
12 |
| VCDI |
0 |
0 |
2 |
21 |
167 |
1603 |
12004 |
18178 |
|
Date: 2025-03-19:
| 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 |
236 |
23 |
20 |
1 |
0 |
0 |
0 |
| OW |
0 |
70 |
20 |
37 |
4 |
0 |
0 |
0 |
| VODI |
0 |
27 |
8 |
49 |
35 |
0 |
0 |
0 |
| ODI |
0 |
15 |
6 |
31 |
61 |
49 |
5 |
1 |
| CDI |
0 |
0 |
2 |
25 |
101 |
293 |
144 |
12 |
| VCDI |
0 |
0 |
0 |
4 |
98 |
1318 |
12354 |
18047 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
209 |
13 |
17 |
0 |
0 |
0 |
0 |
| OW |
0 |
69 |
19 |
20 |
4 |
0 |
0 |
0 |
| VODI |
0 |
41 |
15 |
46 |
17 |
1 |
0 |
0 |
| ODI |
0 |
18 |
4 |
32 |
45 |
15 |
4 |
0 |
| CDI |
0 |
11 |
8 |
47 |
130 |
145 |
174 |
10 |
| VCDI |
0 |
0 |
0 |
4 |
104 |
1499 |
12325 |
18050 |
|
Date: 2025-03-21:
| 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 |
198 |
17 |
37 |
1 |
0 |
0 |
0 |
| OW |
0 |
64 |
14 |
48 |
6 |
0 |
0 |
0 |
| VODI |
0 |
30 |
7 |
44 |
40 |
0 |
0 |
0 |
| ODI |
0 |
10 |
11 |
32 |
62 |
23 |
3 |
2 |
| CDI |
0 |
0 |
1 |
36 |
80 |
210 |
132 |
8 |
| VCDI |
0 |
0 |
0 |
12 |
106 |
830 |
10120 |
20912 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
155 |
12 |
12 |
0 |
0 |
0 |
0 |
| OW |
0 |
75 |
15 |
26 |
4 |
0 |
0 |
0 |
| VODI |
0 |
52 |
7 |
54 |
9 |
0 |
0 |
0 |
| ODI |
0 |
18 |
8 |
37 |
53 |
3 |
4 |
6 |
| CDI |
0 |
2 |
8 |
46 |
119 |
70 |
135 |
25 |
| VCDI |
0 |
0 |
0 |
34 |
110 |
990 |
10116 |
20891 |
|
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