Validation of sea ice concentration
Bulletin date: 2021-10-28
Model vs. observations, sea ice class contingency tables
Date: 2021-10-22:
| 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 |
21197 |
7052 |
964 |
693 |
132 |
36 |
3 |
0 |
| OW |
0 |
74 |
128 |
157 |
118 |
59 |
12 |
0 |
| VODI |
0 |
9 |
63 |
78 |
72 |
105 |
18 |
0 |
| ODI |
0 |
2 |
27 |
64 |
60 |
88 |
41 |
0 |
| CDI |
0 |
0 |
18 |
35 |
44 |
104 |
170 |
0 |
| VCDI |
0 |
0 |
8 |
16 |
55 |
133 |
2989 |
3335 |
|
...date precedes bulletin
|
Date: 2021-10-26:
| 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 |
21497 |
6224 |
806 |
427 |
167 |
54 |
1 |
0 |
| OW |
0 |
67 |
105 |
188 |
114 |
47 |
11 |
0 |
| VODI |
0 |
13 |
38 |
142 |
255 |
113 |
45 |
0 |
| ODI |
0 |
1 |
17 |
87 |
216 |
211 |
108 |
0 |
| CDI |
0 |
0 |
5 |
47 |
86 |
178 |
240 |
3 |
| VCDI |
0 |
0 |
0 |
27 |
57 |
357 |
3914 |
2291 |
|
...date precedes bulletin
|
Date: 2021-10-28:
| 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 |
19657 |
7243 |
1089 |
371 |
175 |
138 |
9 |
0 |
| OW |
0 |
35 |
146 |
118 |
147 |
117 |
28 |
0 |
| VODI |
0 |
7 |
66 |
82 |
185 |
232 |
104 |
0 |
| ODI |
0 |
0 |
29 |
30 |
56 |
304 |
198 |
0 |
| CDI |
0 |
0 |
15 |
20 |
74 |
252 |
451 |
0 |
| VCDI |
0 |
0 |
4 |
11 |
38 |
284 |
3930 |
2514 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19657 |
7255 |
1130 |
401 |
224 |
187 |
12 |
0 |
| OW |
0 |
24 |
107 |
102 |
102 |
106 |
34 |
0 |
| VODI |
0 |
6 |
63 |
71 |
178 |
223 |
126 |
0 |
| ODI |
0 |
0 |
29 |
29 |
65 |
315 |
253 |
0 |
| CDI |
0 |
0 |
16 |
18 |
69 |
220 |
390 |
0 |
| VCDI |
0 |
0 |
4 |
11 |
37 |
276 |
3905 |
2514 |
|
Date: 2021-11-01:
| 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 |
19291 |
7192 |
925 |
301 |
196 |
169 |
28 |
0 |
| OW |
1 |
17 |
110 |
119 |
72 |
59 |
36 |
0 |
| VODI |
0 |
7 |
31 |
88 |
139 |
153 |
49 |
0 |
| ODI |
0 |
4 |
9 |
19 |
96 |
332 |
100 |
0 |
| CDI |
0 |
0 |
6 |
9 |
20 |
200 |
603 |
12 |
| VCDI |
0 |
2 |
14 |
18 |
16 |
139 |
4018 |
3559 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19292 |
7141 |
877 |
306 |
191 |
180 |
56 |
0 |
| OW |
0 |
52 |
114 |
118 |
89 |
86 |
45 |
0 |
| VODI |
0 |
18 |
64 |
59 |
119 |
230 |
138 |
0 |
| ODI |
0 |
5 |
18 |
38 |
73 |
183 |
306 |
6 |
| CDI |
0 |
4 |
7 |
15 |
52 |
202 |
482 |
36 |
| VCDI |
0 |
2 |
15 |
18 |
15 |
171 |
3807 |
3529 |
|
Date: 2021-11-03:
| 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 |
18858 |
7289 |
1198 |
346 |
161 |
185 |
28 |
0 |
| OW |
0 |
14 |
169 |
108 |
85 |
48 |
41 |
0 |
| VODI |
0 |
14 |
55 |
104 |
124 |
141 |
50 |
0 |
| ODI |
0 |
2 |
11 |
44 |
97 |
259 |
84 |
7 |
| CDI |
0 |
3 |
7 |
23 |
52 |
284 |
280 |
30 |
| VCDI |
0 |
0 |
17 |
17 |
52 |
176 |
4104 |
3592 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18858 |
7231 |
1127 |
327 |
185 |
201 |
59 |
0 |
| OW |
0 |
53 |
163 |
85 |
71 |
64 |
40 |
0 |
| VODI |
0 |
32 |
103 |
127 |
104 |
184 |
89 |
0 |
| ODI |
0 |
6 |
44 |
70 |
95 |
222 |
176 |
1 |
| CDI |
0 |
0 |
12 |
22 |
67 |
204 |
430 |
35 |
| VCDI |
0 |
0 |
8 |
11 |
49 |
218 |
3793 |
3593 |
|
Date: 2021-11-05:
| 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 |
18873 |
7326 |
841 |
461 |
111 |
82 |
58 |
0 |
| OW |
0 |
85 |
252 |
121 |
42 |
52 |
37 |
0 |
| VODI |
0 |
34 |
135 |
162 |
52 |
71 |
50 |
0 |
| ODI |
0 |
8 |
25 |
152 |
75 |
85 |
67 |
3 |
| CDI |
0 |
1 |
10 |
132 |
86 |
201 |
209 |
12 |
| VCDI |
0 |
2 |
2 |
74 |
121 |
428 |
4038 |
3583 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18873 |
7278 |
911 |
528 |
140 |
129 |
82 |
0 |
| OW |
0 |
96 |
165 |
114 |
46 |
50 |
49 |
0 |
| VODI |
0 |
57 |
129 |
158 |
67 |
68 |
93 |
1 |
| ODI |
0 |
21 |
38 |
113 |
59 |
129 |
190 |
7 |
| CDI |
0 |
4 |
20 |
96 |
63 |
173 |
338 |
19 |
| VCDI |
0 |
0 |
2 |
93 |
112 |
370 |
3707 |
3571 |
|
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