Validation of sea ice concentration
Bulletin date: 2021-07-22
Model vs. observations, sea ice class contingency tables
Date: 2021-07-16:
| 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 |
17473 |
7156 |
3074 |
1398 |
460 |
99 |
126 |
0 |
| OW |
0 |
0 |
43 |
120 |
233 |
128 |
58 |
0 |
| VODI |
0 |
0 |
19 |
52 |
271 |
231 |
179 |
0 |
| ODI |
0 |
0 |
5 |
32 |
130 |
243 |
378 |
7 |
| CDI |
0 |
0 |
0 |
14 |
165 |
342 |
2371 |
1807 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
286 |
1258 |
|
...date precedes bulletin
|
Date: 2021-07-20:
| 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 |
18227 |
7139 |
3207 |
1147 |
267 |
89 |
81 |
0 |
| OW |
0 |
0 |
53 |
129 |
173 |
114 |
28 |
0 |
| VODI |
0 |
0 |
15 |
117 |
250 |
253 |
100 |
0 |
| ODI |
0 |
0 |
1 |
42 |
140 |
265 |
568 |
0 |
| CDI |
0 |
0 |
0 |
6 |
43 |
296 |
2197 |
1855 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1 |
299 |
1056 |
|
...date precedes bulletin
|
Date: 2021-07-22:
| 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 |
18804 |
7483 |
2775 |
823 |
220 |
72 |
73 |
0 |
| OW |
0 |
0 |
99 |
177 |
152 |
65 |
34 |
0 |
| VODI |
0 |
0 |
22 |
146 |
297 |
182 |
119 |
0 |
| ODI |
0 |
0 |
3 |
33 |
116 |
225 |
653 |
0 |
| CDI |
0 |
0 |
0 |
11 |
65 |
313 |
2170 |
2096 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
117 |
814 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18804 |
7483 |
2798 |
843 |
223 |
77 |
79 |
0 |
| OW |
0 |
0 |
74 |
150 |
143 |
60 |
29 |
0 |
| VODI |
0 |
0 |
24 |
145 |
295 |
190 |
115 |
0 |
| ODI |
0 |
0 |
3 |
41 |
123 |
224 |
647 |
0 |
| CDI |
0 |
0 |
0 |
11 |
66 |
305 |
2207 |
2142 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1 |
89 |
768 |
|
Date: 2021-07-26:
| 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 |
20676 |
6093 |
2375 |
1057 |
186 |
84 |
76 |
0 |
| OW |
0 |
0 |
74 |
166 |
125 |
79 |
37 |
0 |
| VODI |
0 |
0 |
71 |
124 |
195 |
218 |
84 |
0 |
| ODI |
0 |
0 |
22 |
31 |
88 |
425 |
716 |
10 |
| CDI |
0 |
0 |
0 |
1 |
61 |
296 |
1811 |
2413 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
70 |
495 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20676 |
6093 |
2276 |
1008 |
176 |
97 |
87 |
0 |
| OW |
0 |
0 |
138 |
168 |
151 |
100 |
32 |
0 |
| VODI |
0 |
0 |
72 |
161 |
158 |
213 |
161 |
0 |
| ODI |
0 |
0 |
54 |
35 |
84 |
293 |
569 |
0 |
| CDI |
0 |
0 |
2 |
7 |
86 |
399 |
1906 |
2442 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
39 |
476 |
|
Date: 2021-07-28:
| 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 |
20832 |
6183 |
2360 |
903 |
285 |
70 |
63 |
0 |
| OW |
0 |
0 |
70 |
155 |
142 |
59 |
33 |
0 |
| VODI |
0 |
0 |
53 |
126 |
244 |
141 |
115 |
2 |
| ODI |
0 |
0 |
12 |
37 |
106 |
412 |
714 |
47 |
| CDI |
0 |
0 |
0 |
5 |
67 |
299 |
1870 |
2551 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
23 |
180 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20832 |
6183 |
2228 |
826 |
302 |
78 |
75 |
0 |
| OW |
0 |
0 |
145 |
197 |
158 |
77 |
31 |
0 |
| VODI |
0 |
0 |
76 |
138 |
178 |
134 |
212 |
5 |
| ODI |
0 |
0 |
43 |
50 |
116 |
280 |
590 |
41 |
| CDI |
0 |
0 |
3 |
15 |
90 |
412 |
1883 |
2657 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
27 |
77 |
|
Date: 2021-07-30:
| 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 |
20917 |
6270 |
2340 |
820 |
287 |
74 |
82 |
0 |
| OW |
0 |
6 |
72 |
143 |
164 |
47 |
17 |
0 |
| VODI |
0 |
0 |
56 |
122 |
210 |
138 |
90 |
4 |
| ODI |
0 |
0 |
12 |
37 |
120 |
383 |
751 |
57 |
| CDI |
0 |
0 |
0 |
9 |
66 |
365 |
1741 |
2739 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
11 |
9 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20917 |
6264 |
2157 |
771 |
330 |
89 |
86 |
0 |
| OW |
0 |
11 |
186 |
149 |
154 |
45 |
26 |
0 |
| VODI |
0 |
1 |
91 |
128 |
168 |
137 |
211 |
2 |
| ODI |
0 |
0 |
44 |
59 |
117 |
290 |
590 |
36 |
| CDI |
0 |
0 |
2 |
24 |
78 |
446 |
1758 |
2758 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
21 |
13 |
|
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