Validation of sea ice concentration
Bulletin date: 2021-09-23
Model vs. observations, sea ice class contingency tables
Date: 2021-09-17:
| 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 |
24465 |
6363 |
1357 |
691 |
69 |
3 |
0 |
0 |
| OW |
0 |
21 |
126 |
118 |
49 |
7 |
0 |
0 |
| VODI |
0 |
4 |
76 |
106 |
98 |
40 |
9 |
0 |
| ODI |
0 |
0 |
4 |
35 |
120 |
137 |
69 |
0 |
| CDI |
0 |
0 |
0 |
16 |
53 |
251 |
669 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
12 |
186 |
1850 |
1154 |
|
...date precedes bulletin
|
Date: 2021-09-21:
| 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 |
24342 |
6374 |
1788 |
584 |
35 |
3 |
0 |
0 |
| OW |
0 |
14 |
91 |
72 |
25 |
6 |
0 |
0 |
| VODI |
0 |
4 |
44 |
49 |
96 |
43 |
7 |
0 |
| ODI |
0 |
0 |
1 |
20 |
79 |
142 |
66 |
0 |
| CDI |
0 |
0 |
0 |
2 |
40 |
228 |
530 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
62 |
1849 |
1556 |
|
...date precedes bulletin
|
Date: 2021-09-23:
| 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 |
24663 |
6512 |
1417 |
349 |
83 |
5 |
0 |
0 |
| OW |
0 |
25 |
94 |
55 |
37 |
5 |
2 |
0 |
| VODI |
0 |
4 |
67 |
69 |
54 |
23 |
7 |
0 |
| ODI |
0 |
0 |
8 |
43 |
73 |
59 |
41 |
0 |
| CDI |
0 |
0 |
0 |
5 |
94 |
176 |
329 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
94 |
2026 |
1737 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24663 |
6523 |
1436 |
343 |
80 |
7 |
0 |
0 |
| OW |
0 |
13 |
87 |
63 |
41 |
4 |
2 |
0 |
| VODI |
0 |
5 |
54 |
72 |
60 |
28 |
5 |
0 |
| ODI |
0 |
0 |
9 |
39 |
87 |
70 |
40 |
0 |
| CDI |
0 |
0 |
0 |
4 |
73 |
153 |
315 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
100 |
2043 |
1737 |
|
Date: 2021-09-27:
| 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 |
24166 |
6999 |
1429 |
224 |
62 |
19 |
0 |
0 |
| OW |
0 |
29 |
69 |
52 |
39 |
18 |
0 |
0 |
| VODI |
0 |
1 |
40 |
61 |
52 |
42 |
12 |
0 |
| ODI |
0 |
0 |
5 |
30 |
54 |
87 |
42 |
0 |
| CDI |
0 |
0 |
1 |
13 |
18 |
234 |
223 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
44 |
1772 |
2321 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24166 |
6878 |
1371 |
193 |
54 |
22 |
0 |
0 |
| OW |
0 |
91 |
42 |
38 |
26 |
15 |
0 |
0 |
| VODI |
0 |
54 |
59 |
30 |
55 |
37 |
6 |
0 |
| ODI |
0 |
5 |
47 |
39 |
34 |
74 |
17 |
0 |
| CDI |
0 |
1 |
24 |
68 |
46 |
161 |
91 |
0 |
| VCDI |
0 |
0 |
1 |
12 |
11 |
135 |
1935 |
2321 |
|
Date: 2021-09-29:
| 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 |
24376 |
6518 |
1445 |
234 |
57 |
44 |
0 |
0 |
| OW |
0 |
18 |
52 |
89 |
39 |
31 |
9 |
0 |
| VODI |
0 |
3 |
19 |
58 |
63 |
46 |
12 |
0 |
| ODI |
0 |
0 |
5 |
24 |
42 |
71 |
45 |
0 |
| CDI |
0 |
0 |
2 |
10 |
27 |
187 |
264 |
25 |
| VCDI |
0 |
0 |
0 |
1 |
2 |
91 |
2155 |
2095 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24376 |
6458 |
1359 |
195 |
57 |
41 |
6 |
0 |
| OW |
0 |
33 |
67 |
38 |
28 |
35 |
6 |
0 |
| VODI |
0 |
29 |
45 |
63 |
42 |
56 |
27 |
0 |
| ODI |
0 |
10 |
33 |
48 |
40 |
52 |
70 |
4 |
| CDI |
0 |
9 |
14 |
56 |
33 |
102 |
181 |
37 |
| VCDI |
0 |
0 |
5 |
16 |
30 |
184 |
2195 |
2079 |
|
Date: 2021-10-01:
| 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 |
24530 |
6293 |
1389 |
216 |
77 |
33 |
5 |
0 |
| OW |
10 |
16 |
59 |
52 |
62 |
41 |
22 |
0 |
| VODI |
0 |
7 |
25 |
40 |
60 |
68 |
27 |
0 |
| ODI |
0 |
0 |
11 |
13 |
31 |
68 |
67 |
0 |
| CDI |
0 |
0 |
6 |
7 |
38 |
134 |
314 |
16 |
| VCDI |
0 |
0 |
0 |
6 |
12 |
151 |
2187 |
2066 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24540 |
6258 |
1367 |
213 |
57 |
21 |
7 |
0 |
| OW |
0 |
36 |
77 |
40 |
64 |
35 |
19 |
0 |
| VODI |
0 |
15 |
30 |
35 |
63 |
71 |
71 |
0 |
| ODI |
0 |
4 |
9 |
19 |
29 |
61 |
123 |
0 |
| CDI |
0 |
3 |
7 |
24 |
49 |
107 |
265 |
21 |
| VCDI |
0 |
0 |
0 |
3 |
18 |
200 |
2137 |
2061 |
|
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