Validation of sea ice concentration - Asian sector
Bulletin date: 2025-02-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-01-31:
| 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 |
282 |
19 |
13 |
0 |
0 |
0 |
0 |
| OW |
0 |
143 |
9 |
15 |
0 |
0 |
0 |
0 |
| VODI |
0 |
106 |
8 |
14 |
7 |
2 |
0 |
0 |
| ODI |
0 |
45 |
13 |
26 |
19 |
26 |
9 |
0 |
| CDI |
0 |
9 |
26 |
50 |
50 |
56 |
65 |
19 |
| VCDI |
0 |
0 |
1 |
25 |
66 |
442 |
8624 |
21893 |
|
...date precedes bulletin
|
Date: 2025-02-02:
| 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 |
326 |
12 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
140 |
5 |
5 |
0 |
0 |
0 |
0 |
| VODI |
0 |
113 |
1 |
0 |
2 |
1 |
0 |
0 |
| ODI |
0 |
73 |
9 |
14 |
4 |
27 |
5 |
0 |
| CDI |
0 |
58 |
21 |
33 |
55 |
71 |
90 |
1 |
| VCDI |
0 |
9 |
9 |
74 |
128 |
740 |
10629 |
19425 |
|
...date precedes bulletin
|
Date: 2025-02-04:
| 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 |
47 |
349 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
197 |
1 |
0 |
1 |
0 |
0 |
0 |
| VODI |
0 |
100 |
8 |
3 |
1 |
1 |
0 |
0 |
| ODI |
0 |
61 |
10 |
20 |
13 |
9 |
1 |
0 |
| CDI |
0 |
27 |
30 |
63 |
105 |
91 |
73 |
0 |
| VCDI |
0 |
2 |
5 |
40 |
126 |
1181 |
13377 |
16139 |
|
...date precedes bulletin
|
Date: 2025-02-06:
| 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 |
109 |
316 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
18 |
175 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
1 |
121 |
3 |
2 |
2 |
0 |
0 |
0 |
| ODI |
0 |
74 |
6 |
21 |
27 |
1 |
0 |
0 |
| CDI |
0 |
74 |
32 |
52 |
76 |
86 |
29 |
0 |
| VCDI |
0 |
4 |
9 |
76 |
195 |
942 |
9785 |
19846 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
101 |
331 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
26 |
167 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
1 |
117 |
3 |
2 |
2 |
0 |
0 |
0 |
| ODI |
0 |
66 |
5 |
20 |
31 |
2 |
0 |
0 |
| CDI |
0 |
82 |
32 |
50 |
76 |
98 |
35 |
0 |
| VCDI |
0 |
1 |
10 |
79 |
191 |
929 |
9779 |
19846 |
|
Date: 2025-02-08:
| 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 |
26 |
406 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
173 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
163 |
19 |
20 |
4 |
0 |
0 |
0 |
| ODI |
0 |
113 |
30 |
77 |
22 |
9 |
1 |
0 |
| CDI |
0 |
97 |
42 |
135 |
173 |
216 |
69 |
0 |
| VCDI |
0 |
56 |
31 |
101 |
421 |
1677 |
12344 |
15657 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
26 |
408 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
175 |
0 |
1 |
0 |
0 |
0 |
0 |
| VODI |
0 |
172 |
24 |
21 |
4 |
0 |
0 |
0 |
| ODI |
0 |
100 |
25 |
68 |
26 |
12 |
1 |
0 |
| CDI |
0 |
100 |
43 |
140 |
183 |
235 |
109 |
0 |
| VCDI |
0 |
53 |
30 |
103 |
407 |
1655 |
12304 |
15657 |
|
Date: 2025-02-10:
| 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 |
11 |
367 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
249 |
8 |
3 |
0 |
0 |
0 |
0 |
| VODI |
0 |
215 |
52 |
76 |
7 |
1 |
0 |
0 |
| ODI |
0 |
41 |
48 |
107 |
75 |
17 |
0 |
0 |
| CDI |
0 |
21 |
16 |
134 |
332 |
156 |
81 |
2 |
| VCDI |
0 |
39 |
13 |
53 |
356 |
1222 |
11391 |
16989 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11 |
314 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
173 |
1 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
205 |
21 |
29 |
1 |
0 |
0 |
0 |
| ODI |
0 |
116 |
56 |
96 |
43 |
9 |
1 |
0 |
| CDI |
0 |
50 |
28 |
144 |
243 |
109 |
93 |
6 |
| VCDI |
0 |
74 |
31 |
104 |
483 |
1278 |
11378 |
16985 |
|
Date: 2025-02-12:
| 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 |
289 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
135 |
9 |
14 |
4 |
0 |
0 |
0 |
| VODI |
0 |
135 |
29 |
51 |
20 |
0 |
0 |
0 |
| ODI |
0 |
62 |
32 |
88 |
81 |
16 |
0 |
0 |
| CDI |
0 |
35 |
17 |
67 |
286 |
192 |
103 |
4 |
| VCDI |
0 |
1 |
1 |
24 |
229 |
1167 |
16301 |
12689 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
240 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
91 |
2 |
2 |
0 |
0 |
0 |
0 |
| VODI |
0 |
158 |
17 |
13 |
0 |
0 |
0 |
0 |
| ODI |
0 |
103 |
39 |
71 |
28 |
15 |
0 |
0 |
| CDI |
0 |
60 |
27 |
121 |
256 |
126 |
76 |
5 |
| VCDI |
0 |
5 |
3 |
37 |
336 |
1234 |
16328 |
12688 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
192 |
6 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
111 |
10 |
7 |
2 |
0 |
0 |
0 |
| VODI |
0 |
78 |
11 |
21 |
12 |
0 |
0 |
0 |
| ODI |
0 |
36 |
13 |
26 |
55 |
5 |
0 |
1 |
| CDI |
0 |
9 |
15 |
48 |
81 |
248 |
64 |
15 |
| VCDI |
0 |
0 |
1 |
21 |
112 |
1292 |
13351 |
16238 |
|
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