Validation of sea ice concentration
Bulletin date: 2021-09-30
Model vs. observations, sea ice class contingency tables
Date: 2021-09-24:
| 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 |
24692 |
6643 |
1236 |
345 |
41 |
3 |
2 |
0 |
| OW |
0 |
72 |
58 |
58 |
35 |
5 |
4 |
0 |
| VODI |
0 |
20 |
69 |
63 |
49 |
17 |
2 |
0 |
| ODI |
0 |
1 |
23 |
67 |
59 |
47 |
18 |
0 |
| CDI |
0 |
0 |
0 |
7 |
82 |
197 |
312 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
19 |
129 |
2055 |
1728 |
|
...date precedes bulletin
|
Date: 2021-09-28:
| 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 |
24157 |
6817 |
1524 |
199 |
71 |
35 |
0 |
0 |
| OW |
0 |
12 |
62 |
47 |
54 |
32 |
0 |
0 |
| VODI |
0 |
1 |
35 |
68 |
59 |
34 |
10 |
0 |
| ODI |
0 |
0 |
7 |
29 |
48 |
78 |
26 |
0 |
| CDI |
0 |
0 |
1 |
3 |
56 |
211 |
208 |
18 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
80 |
1868 |
2303 |
|
...date precedes bulletin
|
Date: 2021-09-30:
| 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 |
24337 |
6517 |
1388 |
229 |
85 |
40 |
0 |
0 |
| OW |
0 |
17 |
48 |
65 |
71 |
39 |
11 |
0 |
| VODI |
0 |
6 |
23 |
42 |
71 |
55 |
21 |
0 |
| ODI |
0 |
0 |
6 |
13 |
54 |
61 |
52 |
0 |
| CDI |
0 |
0 |
4 |
4 |
34 |
143 |
269 |
12 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
115 |
2148 |
2178 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24337 |
6521 |
1399 |
229 |
76 |
48 |
2 |
0 |
| OW |
0 |
18 |
39 |
65 |
84 |
29 |
5 |
0 |
| VODI |
0 |
1 |
23 |
41 |
76 |
58 |
22 |
0 |
| ODI |
0 |
0 |
5 |
14 |
45 |
59 |
60 |
0 |
| CDI |
0 |
0 |
3 |
4 |
33 |
142 |
295 |
1 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
117 |
2117 |
2189 |
|
Date: 2021-10-04:
| 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 |
25125 |
6072 |
860 |
166 |
95 |
23 |
0 |
0 |
| OW |
0 |
28 |
17 |
27 |
63 |
43 |
12 |
0 |
| VODI |
0 |
20 |
13 |
22 |
59 |
60 |
23 |
0 |
| ODI |
0 |
7 |
5 |
15 |
38 |
72 |
61 |
0 |
| CDI |
0 |
2 |
2 |
11 |
64 |
182 |
308 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
42 |
198 |
2827 |
1594 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
25125 |
6049 |
857 |
155 |
103 |
26 |
4 |
0 |
| OW |
0 |
42 |
17 |
40 |
78 |
54 |
21 |
0 |
| VODI |
0 |
22 |
11 |
21 |
66 |
96 |
53 |
0 |
| ODI |
0 |
8 |
8 |
13 |
21 |
61 |
85 |
0 |
| CDI |
0 |
8 |
4 |
9 |
33 |
73 |
292 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
60 |
268 |
2776 |
1594 |
|
Date: 2021-10-06:
| 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 |
24661 |
6132 |
1075 |
191 |
101 |
52 |
0 |
0 |
| OW |
0 |
22 |
49 |
29 |
46 |
55 |
5 |
0 |
| VODI |
0 |
9 |
15 |
43 |
24 |
73 |
6 |
0 |
| ODI |
0 |
4 |
10 |
26 |
39 |
84 |
28 |
0 |
| CDI |
0 |
1 |
4 |
14 |
37 |
189 |
106 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
19 |
221 |
2682 |
2099 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24637 |
6065 |
1046 |
163 |
104 |
68 |
1 |
0 |
| OW |
23 |
72 |
63 |
44 |
39 |
72 |
4 |
0 |
| VODI |
1 |
24 |
27 |
44 |
31 |
106 |
16 |
0 |
| ODI |
0 |
6 |
13 |
32 |
30 |
85 |
38 |
0 |
| CDI |
0 |
1 |
4 |
26 |
42 |
129 |
192 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
20 |
214 |
2576 |
2099 |
|
Date: 2021-10-08:
| 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 |
23843 |
6371 |
1070 |
208 |
201 |
123 |
2 |
0 |
| OW |
0 |
14 |
94 |
65 |
48 |
108 |
7 |
0 |
| VODI |
0 |
0 |
42 |
40 |
35 |
82 |
35 |
0 |
| ODI |
0 |
0 |
5 |
12 |
21 |
65 |
49 |
0 |
| CDI |
0 |
0 |
4 |
19 |
47 |
110 |
157 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
20 |
190 |
2149 |
2923 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23843 |
6353 |
1023 |
213 |
204 |
154 |
4 |
0 |
| OW |
0 |
30 |
128 |
53 |
27 |
61 |
22 |
0 |
| VODI |
0 |
2 |
50 |
45 |
49 |
99 |
53 |
0 |
| ODI |
0 |
0 |
13 |
13 |
30 |
72 |
101 |
0 |
| CDI |
0 |
0 |
1 |
18 |
38 |
91 |
275 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
24 |
201 |
1944 |
2923 |
|
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