Validation of sea ice concentration
Bulletin date: 2021-09-09
Model vs. observations, sea ice class contingency tables
Date: 2021-09-03:
| 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 |
24226 |
5600 |
1892 |
646 |
165 |
9 |
2 |
0 |
| OW |
0 |
22 |
87 |
145 |
93 |
21 |
16 |
0 |
| VODI |
0 |
0 |
68 |
134 |
175 |
153 |
56 |
0 |
| ODI |
0 |
0 |
1 |
44 |
126 |
274 |
304 |
0 |
| CDI |
0 |
0 |
0 |
0 |
18 |
73 |
2128 |
1178 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
8 |
257 |
238 |
|
...date precedes bulletin
|
Date: 2021-09-07:
| 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 |
24093 |
5825 |
2177 |
709 |
92 |
5 |
2 |
0 |
| OW |
0 |
7 |
132 |
90 |
69 |
15 |
8 |
0 |
| VODI |
0 |
0 |
76 |
125 |
197 |
126 |
29 |
0 |
| ODI |
0 |
0 |
9 |
36 |
147 |
225 |
258 |
0 |
| CDI |
0 |
0 |
0 |
3 |
23 |
102 |
2118 |
771 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
3 |
324 |
359 |
|
...date precedes bulletin
|
Date: 2021-09-09:
| 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 |
24043 |
5890 |
1900 |
868 |
78 |
9 |
2 |
0 |
| OW |
0 |
43 |
143 |
142 |
44 |
5 |
0 |
0 |
| VODI |
0 |
9 |
98 |
161 |
166 |
68 |
17 |
0 |
| ODI |
0 |
0 |
29 |
81 |
158 |
229 |
146 |
0 |
| CDI |
0 |
0 |
2 |
7 |
23 |
207 |
1884 |
138 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
10 |
886 |
662 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24043 |
5893 |
1929 |
914 |
91 |
9 |
2 |
0 |
| OW |
0 |
38 |
134 |
107 |
38 |
4 |
3 |
0 |
| VODI |
0 |
11 |
84 |
163 |
147 |
64 |
16 |
0 |
| ODI |
0 |
0 |
23 |
67 |
161 |
242 |
145 |
0 |
| CDI |
0 |
0 |
2 |
7 |
30 |
195 |
1902 |
159 |
| VCDI |
0 |
0 |
0 |
1 |
13 |
14 |
867 |
641 |
|
Date: 2021-09-13:
| 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 |
24159 |
6090 |
2066 |
373 |
113 |
15 |
1 |
0 |
| OW |
0 |
30 |
167 |
79 |
55 |
8 |
1 |
0 |
| VODI |
0 |
3 |
144 |
109 |
94 |
58 |
3 |
0 |
| ODI |
0 |
0 |
36 |
48 |
125 |
253 |
56 |
0 |
| CDI |
0 |
0 |
10 |
10 |
39 |
415 |
744 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
32 |
1658 |
1165 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24159 |
5958 |
2031 |
355 |
90 |
17 |
0 |
0 |
| OW |
0 |
87 |
115 |
53 |
43 |
4 |
2 |
0 |
| VODI |
0 |
73 |
163 |
77 |
64 |
29 |
3 |
0 |
| ODI |
0 |
5 |
88 |
90 |
98 |
106 |
11 |
0 |
| CDI |
0 |
0 |
23 |
39 |
131 |
485 |
576 |
0 |
| VCDI |
0 |
0 |
3 |
5 |
0 |
140 |
1871 |
1165 |
|
Date: 2021-09-15:
| 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 |
24637 |
5930 |
1780 |
470 |
82 |
6 |
0 |
0 |
| OW |
0 |
15 |
106 |
134 |
42 |
15 |
0 |
0 |
| VODI |
0 |
1 |
69 |
95 |
111 |
50 |
14 |
0 |
| ODI |
0 |
0 |
5 |
40 |
145 |
176 |
110 |
0 |
| CDI |
0 |
0 |
0 |
7 |
53 |
281 |
726 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
6 |
118 |
1693 |
1241 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24637 |
5801 |
1706 |
401 |
58 |
7 |
0 |
0 |
| OW |
0 |
57 |
123 |
108 |
39 |
8 |
1 |
0 |
| VODI |
0 |
69 |
86 |
126 |
73 |
37 |
8 |
0 |
| ODI |
0 |
18 |
35 |
85 |
126 |
84 |
42 |
0 |
| CDI |
0 |
1 |
10 |
26 |
131 |
353 |
598 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
12 |
157 |
1894 |
1241 |
|
Date: 2021-09-17:
| 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 |
24465 |
6363 |
1357 |
691 |
69 |
3 |
0 |
0 |
| OW |
0 |
21 |
126 |
118 |
49 |
7 |
0 |
0 |
| VODI |
0 |
4 |
76 |
106 |
98 |
40 |
9 |
0 |
| ODI |
0 |
0 |
4 |
35 |
120 |
137 |
69 |
0 |
| CDI |
0 |
0 |
0 |
16 |
53 |
251 |
669 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
12 |
186 |
1850 |
1154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24465 |
6212 |
1305 |
544 |
27 |
0 |
0 |
0 |
| OW |
0 |
98 |
82 |
157 |
44 |
1 |
0 |
0 |
| VODI |
0 |
63 |
102 |
144 |
60 |
21 |
2 |
0 |
| ODI |
0 |
14 |
56 |
82 |
93 |
58 |
12 |
0 |
| CDI |
0 |
1 |
18 |
38 |
158 |
296 |
474 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
19 |
248 |
2109 |
1154 |
|
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