Validation of sea ice concentration
Bulletin date: 2021-10-07
Model vs. observations, sea ice class contingency tables
Date: 2021-10-01:
| 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 |
24530 |
6293 |
1389 |
216 |
77 |
33 |
5 |
0 |
| OW |
10 |
16 |
59 |
52 |
62 |
41 |
22 |
0 |
| VODI |
0 |
7 |
25 |
40 |
60 |
68 |
27 |
0 |
| ODI |
0 |
0 |
11 |
13 |
31 |
68 |
67 |
0 |
| CDI |
0 |
0 |
6 |
7 |
38 |
134 |
314 |
16 |
| VCDI |
0 |
0 |
0 |
6 |
12 |
151 |
2187 |
2066 |
|
...date precedes bulletin
|
Date: 2021-10-05:
| 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 |
24896 |
6252 |
836 |
208 |
76 |
35 |
2 |
0 |
| OW |
0 |
29 |
22 |
34 |
46 |
37 |
14 |
0 |
| VODI |
0 |
17 |
17 |
19 |
45 |
51 |
33 |
0 |
| ODI |
0 |
5 |
6 |
14 |
51 |
45 |
58 |
0 |
| CDI |
0 |
4 |
11 |
21 |
56 |
154 |
239 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
44 |
245 |
3149 |
1386 |
|
...date precedes bulletin
|
Date: 2021-10-07:
| 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 |
24208 |
6494 |
1006 |
160 |
81 |
81 |
0 |
0 |
| OW |
0 |
41 |
74 |
38 |
39 |
75 |
0 |
0 |
| VODI |
0 |
8 |
44 |
29 |
39 |
77 |
3 |
0 |
| ODI |
0 |
2 |
8 |
18 |
45 |
82 |
18 |
0 |
| CDI |
0 |
0 |
6 |
11 |
26 |
175 |
89 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
29 |
245 |
2729 |
2173 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24208 |
6501 |
1016 |
150 |
81 |
94 |
0 |
0 |
| OW |
0 |
37 |
60 |
47 |
34 |
60 |
0 |
0 |
| VODI |
0 |
5 |
48 |
32 |
43 |
86 |
2 |
0 |
| ODI |
0 |
2 |
9 |
16 |
40 |
89 |
18 |
0 |
| CDI |
0 |
0 |
5 |
12 |
34 |
148 |
99 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
27 |
258 |
2720 |
2173 |
|
Date: 2021-10-11:
| 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 |
24311 |
5736 |
673 |
358 |
160 |
36 |
4 |
0 |
| OW |
0 |
6 |
40 |
83 |
99 |
71 |
8 |
0 |
| VODI |
0 |
1 |
10 |
49 |
117 |
103 |
20 |
0 |
| ODI |
0 |
0 |
9 |
21 |
61 |
104 |
75 |
0 |
| CDI |
0 |
0 |
2 |
25 |
60 |
113 |
276 |
0 |
| VCDI |
0 |
0 |
0 |
20 |
94 |
243 |
2429 |
2742 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24311 |
5716 |
658 |
356 |
259 |
118 |
20 |
0 |
| OW |
0 |
26 |
51 |
89 |
118 |
96 |
18 |
0 |
| VODI |
0 |
1 |
15 |
52 |
80 |
99 |
49 |
0 |
| ODI |
0 |
0 |
10 |
25 |
38 |
51 |
99 |
0 |
| CDI |
0 |
0 |
0 |
16 |
25 |
84 |
206 |
0 |
| VCDI |
0 |
0 |
0 |
18 |
71 |
222 |
2420 |
2742 |
|
Date: 2021-10-13:
| 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 |
23719 |
5792 |
971 |
333 |
257 |
107 |
5 |
0 |
| OW |
0 |
9 |
71 |
46 |
69 |
79 |
9 |
0 |
| VODI |
0 |
0 |
51 |
29 |
61 |
109 |
36 |
0 |
| ODI |
0 |
0 |
20 |
15 |
43 |
91 |
90 |
0 |
| CDI |
0 |
0 |
8 |
13 |
29 |
122 |
274 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
19 |
208 |
2563 |
2901 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23719 |
5775 |
917 |
316 |
260 |
180 |
11 |
0 |
| OW |
0 |
22 |
85 |
44 |
84 |
123 |
19 |
0 |
| VODI |
0 |
4 |
88 |
49 |
79 |
127 |
83 |
0 |
| ODI |
0 |
0 |
28 |
23 |
27 |
43 |
126 |
0 |
| CDI |
0 |
0 |
3 |
11 |
20 |
52 |
238 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
8 |
191 |
2500 |
2901 |
|
Date: 2021-10-15:
| 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 |
22352 |
6878 |
1292 |
244 |
171 |
94 |
3 |
0 |
| OW |
0 |
17 |
118 |
64 |
52 |
72 |
15 |
0 |
| VODI |
0 |
8 |
77 |
38 |
35 |
91 |
54 |
0 |
| ODI |
0 |
0 |
35 |
16 |
30 |
52 |
89 |
0 |
| CDI |
0 |
0 |
29 |
13 |
26 |
41 |
278 |
0 |
| VCDI |
0 |
0 |
5 |
20 |
28 |
108 |
2704 |
3010 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22352 |
6859 |
1251 |
261 |
211 |
198 |
45 |
0 |
| OW |
0 |
27 |
120 |
41 |
29 |
51 |
74 |
0 |
| VODI |
0 |
16 |
112 |
51 |
35 |
34 |
174 |
0 |
| ODI |
0 |
1 |
51 |
9 |
18 |
36 |
114 |
0 |
| CDI |
0 |
0 |
19 |
27 |
31 |
46 |
220 |
0 |
| VCDI |
0 |
0 |
3 |
6 |
18 |
93 |
2516 |
3010 |
|
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