Validation of sea ice concentration
Bulletin date: 2021-09-16
Model vs. observations, sea ice class contingency tables
Date: 2021-09-10:
| 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 |
24159 |
5996 |
1724 |
763 |
53 |
2 |
2 |
0 |
| OW |
0 |
100 |
159 |
96 |
49 |
2 |
0 |
0 |
| VODI |
0 |
39 |
114 |
123 |
166 |
49 |
17 |
0 |
| ODI |
0 |
5 |
47 |
89 |
144 |
209 |
111 |
0 |
| CDI |
0 |
0 |
7 |
7 |
59 |
218 |
1539 |
55 |
| VCDI |
0 |
0 |
0 |
0 |
18 |
26 |
1248 |
764 |
|
...date precedes bulletin
|
Date: 2021-09-14:
| 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 |
24305 |
6028 |
1930 |
547 |
70 |
8 |
1 |
0 |
| OW |
0 |
20 |
121 |
108 |
48 |
8 |
1 |
0 |
| VODI |
0 |
1 |
87 |
117 |
112 |
39 |
9 |
0 |
| ODI |
0 |
0 |
2 |
37 |
140 |
239 |
93 |
0 |
| CDI |
0 |
0 |
0 |
7 |
35 |
315 |
774 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
80 |
1646 |
1231 |
|
...date precedes bulletin
|
Date: 2021-09-16:
| 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 |
24666 |
6022 |
1549 |
547 |
121 |
26 |
0 |
0 |
| OW |
0 |
16 |
117 |
113 |
60 |
22 |
0 |
0 |
| VODI |
0 |
5 |
70 |
82 |
117 |
44 |
13 |
0 |
| ODI |
0 |
0 |
1 |
28 |
120 |
159 |
110 |
0 |
| CDI |
0 |
0 |
0 |
9 |
37 |
231 |
732 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
12 |
171 |
1769 |
1189 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24666 |
6018 |
1568 |
532 |
100 |
25 |
0 |
0 |
| OW |
0 |
22 |
111 |
122 |
77 |
19 |
1 |
0 |
| VODI |
0 |
3 |
57 |
85 |
138 |
59 |
13 |
0 |
| ODI |
0 |
0 |
1 |
26 |
97 |
144 |
114 |
0 |
| CDI |
0 |
0 |
0 |
12 |
33 |
211 |
783 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
22 |
195 |
1713 |
1189 |
|
Date: 2021-09-20:
| 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 |
24285 |
6584 |
1592 |
592 |
76 |
4 |
0 |
0 |
| OW |
0 |
19 |
90 |
58 |
39 |
5 |
0 |
0 |
| VODI |
0 |
2 |
51 |
64 |
113 |
41 |
3 |
0 |
| ODI |
0 |
0 |
0 |
33 |
116 |
173 |
66 |
0 |
| CDI |
0 |
0 |
0 |
0 |
49 |
182 |
657 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
60 |
1562 |
1640 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24285 |
6518 |
1526 |
520 |
55 |
3 |
0 |
0 |
| OW |
0 |
70 |
106 |
83 |
40 |
7 |
0 |
0 |
| VODI |
0 |
17 |
80 |
98 |
103 |
44 |
13 |
0 |
| ODI |
0 |
0 |
20 |
33 |
119 |
120 |
50 |
0 |
| CDI |
0 |
0 |
1 |
13 |
70 |
196 |
526 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
95 |
1699 |
1640 |
|
Date: 2021-09-22:
| 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 |
24424 |
6644 |
1497 |
476 |
29 |
5 |
0 |
0 |
| OW |
0 |
24 |
86 |
71 |
38 |
7 |
0 |
0 |
| VODI |
0 |
6 |
51 |
64 |
62 |
30 |
11 |
0 |
| ODI |
0 |
0 |
1 |
25 |
92 |
73 |
73 |
0 |
| CDI |
0 |
0 |
0 |
12 |
64 |
165 |
397 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
83 |
2087 |
1548 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24424 |
6539 |
1416 |
380 |
17 |
6 |
0 |
0 |
| OW |
0 |
88 |
50 |
83 |
18 |
4 |
0 |
0 |
| VODI |
0 |
34 |
114 |
85 |
43 |
23 |
3 |
0 |
| ODI |
0 |
13 |
50 |
76 |
128 |
64 |
38 |
0 |
| CDI |
0 |
0 |
5 |
24 |
79 |
145 |
347 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
121 |
2180 |
1548 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24692 |
6464 |
1165 |
289 |
32 |
1 |
1 |
0 |
| OW |
0 |
112 |
37 |
49 |
27 |
5 |
1 |
0 |
| VODI |
0 |
105 |
66 |
63 |
43 |
24 |
6 |
0 |
| ODI |
0 |
49 |
64 |
82 |
62 |
63 |
8 |
0 |
| CDI |
0 |
6 |
54 |
49 |
77 |
147 |
103 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
44 |
158 |
2274 |
1728 |
|
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