Validation of sea ice concentration
Bulletin date: 2021-07-29
Model vs. observations, sea ice class contingency tables
Date: 2021-07-23:
| 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 |
18845 |
7570 |
2661 |
830 |
211 |
71 |
72 |
0 |
| OW |
0 |
0 |
105 |
179 |
172 |
75 |
38 |
0 |
| VODI |
0 |
0 |
27 |
167 |
274 |
164 |
131 |
0 |
| ODI |
0 |
0 |
2 |
29 |
114 |
259 |
633 |
0 |
| CDI |
0 |
0 |
0 |
10 |
68 |
327 |
2156 |
2079 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
111 |
779 |
|
...date precedes bulletin
|
Date: 2021-07-27:
| 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 |
20821 |
6094 |
2441 |
900 |
268 |
64 |
60 |
0 |
| OW |
0 |
0 |
79 |
150 |
128 |
58 |
32 |
0 |
| VODI |
0 |
0 |
56 |
115 |
247 |
168 |
101 |
0 |
| ODI |
0 |
0 |
16 |
31 |
109 |
411 |
703 |
31 |
| CDI |
0 |
0 |
0 |
4 |
64 |
293 |
1900 |
2403 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
43 |
369 |
|
...date precedes bulletin
|
Date: 2021-07-29:
| 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 |
20980 |
6228 |
2142 |
928 |
324 |
77 |
65 |
0 |
| OW |
0 |
1 |
62 |
140 |
183 |
54 |
31 |
0 |
| VODI |
0 |
0 |
50 |
111 |
234 |
125 |
100 |
4 |
| ODI |
0 |
0 |
12 |
36 |
154 |
337 |
759 |
46 |
| CDI |
0 |
0 |
0 |
11 |
84 |
352 |
1783 |
2686 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
18 |
42 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20980 |
6226 |
2140 |
922 |
332 |
84 |
63 |
0 |
| OW |
0 |
3 |
55 |
131 |
158 |
38 |
32 |
0 |
| VODI |
0 |
0 |
53 |
115 |
254 |
130 |
94 |
4 |
| ODI |
0 |
0 |
18 |
44 |
146 |
364 |
823 |
45 |
| CDI |
0 |
0 |
0 |
14 |
89 |
329 |
1721 |
2631 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
23 |
98 |
|
Date: 2021-08-02:
| 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 |
21128 |
6215 |
2500 |
811 |
286 |
59 |
12 |
0 |
| OW |
0 |
0 |
64 |
150 |
116 |
38 |
7 |
0 |
| VODI |
0 |
0 |
20 |
98 |
188 |
168 |
52 |
0 |
| ODI |
0 |
0 |
0 |
33 |
167 |
456 |
460 |
12 |
| CDI |
0 |
0 |
0 |
3 |
28 |
478 |
1932 |
2287 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
56 |
335 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21128 |
6215 |
2393 |
767 |
282 |
57 |
12 |
0 |
| OW |
0 |
0 |
87 |
146 |
94 |
51 |
6 |
0 |
| VODI |
0 |
0 |
85 |
132 |
177 |
154 |
92 |
0 |
| ODI |
0 |
0 |
19 |
38 |
167 |
328 |
816 |
51 |
| CDI |
0 |
0 |
0 |
12 |
65 |
609 |
1572 |
2574 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
21 |
9 |
|
Date: 2021-08-04:
| 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 |
21857 |
6174 |
2083 |
667 |
283 |
55 |
5 |
0 |
| OW |
0 |
0 |
71 |
130 |
112 |
61 |
4 |
0 |
| VODI |
0 |
0 |
16 |
105 |
189 |
181 |
48 |
0 |
| ODI |
0 |
0 |
1 |
25 |
202 |
486 |
419 |
18 |
| CDI |
0 |
0 |
0 |
5 |
49 |
589 |
2019 |
1919 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
101 |
285 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21857 |
6160 |
1948 |
636 |
290 |
55 |
5 |
0 |
| OW |
0 |
13 |
101 |
120 |
87 |
62 |
9 |
0 |
| VODI |
0 |
1 |
97 |
124 |
152 |
143 |
100 |
5 |
| ODI |
0 |
0 |
25 |
36 |
205 |
372 |
743 |
37 |
| CDI |
0 |
0 |
0 |
16 |
101 |
740 |
1721 |
2175 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
18 |
5 |
|
Date: 2021-08-06:
| 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 |
21845 |
6199 |
2301 |
584 |
258 |
45 |
4 |
0 |
| OW |
0 |
0 |
89 |
129 |
124 |
60 |
16 |
0 |
| VODI |
0 |
0 |
22 |
85 |
195 |
190 |
56 |
0 |
| ODI |
0 |
0 |
1 |
38 |
189 |
472 |
459 |
5 |
| CDI |
0 |
0 |
0 |
10 |
81 |
518 |
2031 |
1745 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
125 |
282 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21845 |
6195 |
2137 |
570 |
278 |
49 |
7 |
0 |
| OW |
0 |
4 |
145 |
108 |
95 |
74 |
14 |
0 |
| VODI |
0 |
0 |
93 |
100 |
171 |
170 |
134 |
13 |
| ODI |
0 |
0 |
38 |
49 |
191 |
363 |
744 |
35 |
| CDI |
0 |
0 |
0 |
19 |
112 |
629 |
1776 |
1979 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
16 |
5 |
|
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