Validation of sea ice concentration
Bulletin date: 2021-09-02
Model vs. observations, sea ice class contingency tables
Date: 2021-08-27:
| 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 |
23097 |
6655 |
1641 |
725 |
145 |
5 |
3 |
0 |
| OW |
0 |
10 |
90 |
243 |
93 |
21 |
7 |
0 |
| VODI |
0 |
0 |
44 |
297 |
263 |
127 |
54 |
0 |
| ODI |
0 |
0 |
1 |
84 |
146 |
318 |
456 |
0 |
| CDI |
0 |
0 |
0 |
1 |
26 |
124 |
1912 |
1157 |
| VCDI |
0 |
0 |
0 |
3 |
10 |
15 |
299 |
87 |
|
...date precedes bulletin
|
Date: 2021-08-31:
| 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 |
23985 |
6011 |
1676 |
826 |
142 |
8 |
4 |
0 |
| OW |
0 |
6 |
92 |
169 |
73 |
24 |
6 |
0 |
| VODI |
0 |
0 |
38 |
206 |
177 |
127 |
43 |
0 |
| ODI |
0 |
0 |
1 |
64 |
156 |
303 |
286 |
0 |
| CDI |
0 |
0 |
0 |
6 |
37 |
89 |
2089 |
1166 |
| VCDI |
0 |
0 |
0 |
3 |
4 |
2 |
225 |
115 |
|
...date precedes bulletin
|
Date: 2021-09-02:
| 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 |
24351 |
5651 |
1837 |
572 |
158 |
7 |
3 |
0 |
| OW |
0 |
21 |
89 |
153 |
78 |
15 |
23 |
0 |
| VODI |
0 |
1 |
43 |
163 |
142 |
92 |
127 |
0 |
| ODI |
0 |
0 |
3 |
61 |
99 |
190 |
434 |
1 |
| CDI |
0 |
0 |
0 |
1 |
21 |
42 |
1824 |
1498 |
| VCDI |
0 |
0 |
0 |
3 |
4 |
3 |
225 |
224 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24351 |
5649 |
1844 |
574 |
159 |
7 |
5 |
0 |
| OW |
0 |
18 |
81 |
137 |
75 |
16 |
27 |
0 |
| VODI |
0 |
6 |
41 |
173 |
131 |
97 |
121 |
0 |
| ODI |
0 |
0 |
6 |
62 |
114 |
179 |
422 |
3 |
| CDI |
0 |
0 |
0 |
4 |
19 |
49 |
1784 |
1497 |
| VCDI |
0 |
0 |
0 |
3 |
4 |
1 |
277 |
223 |
|
Date: 2021-09-06:
| 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 |
24051 |
5746 |
2207 |
727 |
110 |
9 |
2 |
0 |
| OW |
0 |
0 |
118 |
137 |
61 |
13 |
5 |
0 |
| VODI |
0 |
0 |
45 |
122 |
191 |
169 |
35 |
0 |
| ODI |
0 |
0 |
3 |
40 |
129 |
243 |
294 |
0 |
| CDI |
0 |
0 |
0 |
1 |
24 |
104 |
2133 |
1037 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
3 |
296 |
102 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24051 |
5693 |
2083 |
574 |
88 |
7 |
2 |
0 |
| OW |
0 |
32 |
126 |
147 |
60 |
19 |
10 |
0 |
| VODI |
0 |
21 |
136 |
216 |
143 |
97 |
23 |
0 |
| ODI |
0 |
0 |
28 |
82 |
170 |
247 |
200 |
0 |
| CDI |
0 |
0 |
0 |
8 |
50 |
168 |
2137 |
932 |
| VCDI |
0 |
0 |
0 |
0 |
6 |
3 |
393 |
207 |
|
Date: 2021-09-08:
| 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 |
24111 |
5845 |
2105 |
665 |
121 |
5 |
2 |
0 |
| OW |
0 |
17 |
153 |
90 |
71 |
15 |
4 |
0 |
| VODI |
0 |
0 |
106 |
122 |
186 |
108 |
23 |
0 |
| ODI |
0 |
0 |
24 |
44 |
141 |
243 |
210 |
0 |
| CDI |
0 |
0 |
1 |
7 |
19 |
163 |
2053 |
207 |
| VCDI |
0 |
0 |
0 |
0 |
5 |
4 |
675 |
614 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24111 |
5756 |
1954 |
530 |
98 |
3 |
4 |
0 |
| OW |
0 |
45 |
135 |
117 |
69 |
22 |
3 |
0 |
| VODI |
0 |
52 |
178 |
185 |
153 |
59 |
31 |
0 |
| ODI |
0 |
9 |
107 |
70 |
159 |
217 |
133 |
0 |
| CDI |
0 |
0 |
15 |
26 |
52 |
226 |
1734 |
19 |
| VCDI |
0 |
0 |
0 |
0 |
12 |
11 |
1062 |
802 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24159 |
5864 |
1638 |
653 |
29 |
0 |
2 |
0 |
| OW |
0 |
91 |
116 |
117 |
45 |
4 |
4 |
0 |
| VODI |
0 |
121 |
159 |
174 |
118 |
38 |
13 |
0 |
| ODI |
0 |
57 |
97 |
78 |
150 |
128 |
68 |
0 |
| CDI |
0 |
7 |
41 |
56 |
134 |
295 |
1175 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
41 |
1655 |
819 |
|
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