Validation of sea ice concentration
Bulletin date: 2021-03-18
Model vs. observations, sea ice class contingency tables
Date: 2021-03-12:
| 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 |
12802 |
5625 |
914 |
292 |
68 |
37 |
11 |
0 |
| OW |
0 |
51 |
146 |
126 |
32 |
30 |
22 |
0 |
| VODI |
0 |
24 |
91 |
183 |
82 |
51 |
31 |
0 |
| ODI |
0 |
5 |
47 |
120 |
60 |
80 |
97 |
30 |
| CDI |
0 |
0 |
35 |
109 |
105 |
139 |
342 |
86 |
| VCDI |
0 |
0 |
6 |
189 |
271 |
486 |
7225 |
8109 |
|
...date precedes bulletin
|
Date: 2021-03-16:
| 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 |
12567 |
5473 |
773 |
318 |
190 |
120 |
37 |
0 |
| OW |
0 |
30 |
128 |
102 |
72 |
83 |
27 |
0 |
| VODI |
0 |
10 |
86 |
112 |
99 |
114 |
58 |
0 |
| ODI |
0 |
1 |
30 |
67 |
92 |
132 |
103 |
1 |
| CDI |
0 |
0 |
16 |
38 |
108 |
195 |
435 |
57 |
| VCDI |
0 |
0 |
20 |
73 |
153 |
493 |
6899 |
8847 |
|
...date precedes bulletin
|
Date: 2021-03-18:
| 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 |
12440 |
5738 |
798 |
252 |
150 |
64 |
8 |
0 |
| OW |
0 |
54 |
203 |
83 |
65 |
55 |
12 |
0 |
| VODI |
0 |
23 |
113 |
102 |
104 |
90 |
29 |
0 |
| ODI |
0 |
10 |
42 |
87 |
75 |
123 |
71 |
0 |
| CDI |
0 |
3 |
29 |
71 |
156 |
268 |
456 |
51 |
| VCDI |
0 |
0 |
21 |
28 |
94 |
676 |
7533 |
7982 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12440 |
5760 |
816 |
253 |
151 |
69 |
10 |
0 |
| OW |
0 |
37 |
191 |
79 |
60 |
47 |
11 |
0 |
| VODI |
0 |
19 |
111 |
113 |
106 |
86 |
30 |
0 |
| ODI |
0 |
10 |
43 |
85 |
84 |
127 |
77 |
0 |
| CDI |
0 |
2 |
24 |
65 |
140 |
288 |
490 |
47 |
| VCDI |
0 |
0 |
21 |
28 |
103 |
659 |
7491 |
7986 |
|
Date: 2021-03-22:
| 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 |
12427 |
5683 |
1061 |
395 |
157 |
19 |
2 |
0 |
| OW |
0 |
66 |
115 |
136 |
127 |
28 |
5 |
0 |
| VODI |
0 |
16 |
119 |
124 |
194 |
100 |
17 |
0 |
| ODI |
0 |
0 |
43 |
117 |
217 |
170 |
87 |
0 |
| CDI |
0 |
0 |
29 |
129 |
247 |
383 |
531 |
46 |
| VCDI |
0 |
0 |
28 |
202 |
446 |
1014 |
8009 |
5670 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12427 |
5624 |
973 |
300 |
137 |
23 |
2 |
0 |
| OW |
0 |
87 |
164 |
104 |
85 |
20 |
12 |
0 |
| VODI |
0 |
39 |
133 |
144 |
141 |
66 |
22 |
0 |
| ODI |
0 |
11 |
52 |
143 |
197 |
131 |
61 |
1 |
| CDI |
0 |
4 |
31 |
146 |
244 |
315 |
441 |
56 |
| VCDI |
0 |
0 |
42 |
266 |
584 |
1159 |
8113 |
5659 |
|
Date: 2021-03-24:
| 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 |
12393 |
5903 |
1063 |
302 |
67 |
24 |
4 |
0 |
| OW |
0 |
68 |
185 |
128 |
70 |
17 |
8 |
0 |
| VODI |
0 |
46 |
118 |
179 |
127 |
42 |
23 |
0 |
| ODI |
0 |
11 |
63 |
131 |
176 |
91 |
87 |
0 |
| CDI |
0 |
8 |
45 |
134 |
208 |
217 |
386 |
31 |
| VCDI |
0 |
12 |
103 |
270 |
547 |
856 |
8864 |
5152 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12393 |
5819 |
922 |
292 |
66 |
27 |
5 |
0 |
| OW |
0 |
105 |
178 |
93 |
54 |
15 |
10 |
0 |
| VODI |
0 |
52 |
186 |
111 |
115 |
38 |
34 |
0 |
| ODI |
0 |
25 |
82 |
161 |
145 |
93 |
108 |
0 |
| CDI |
0 |
19 |
60 |
134 |
195 |
174 |
412 |
55 |
| VCDI |
0 |
28 |
149 |
353 |
620 |
900 |
8803 |
5128 |
|
Date: 2021-03-26:
| 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 |
12468 |
5938 |
918 |
393 |
68 |
12 |
6 |
0 |
| OW |
0 |
92 |
139 |
154 |
62 |
12 |
14 |
0 |
| VODI |
0 |
44 |
118 |
171 |
131 |
23 |
26 |
0 |
| ODI |
0 |
9 |
79 |
137 |
167 |
64 |
66 |
1 |
| CDI |
0 |
9 |
59 |
149 |
221 |
194 |
271 |
13 |
| VCDI |
0 |
0 |
64 |
187 |
826 |
898 |
7880 |
6076 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12468 |
5750 |
823 |
419 |
84 |
14 |
9 |
0 |
| OW |
0 |
121 |
100 |
112 |
70 |
7 |
7 |
0 |
| VODI |
0 |
95 |
123 |
119 |
117 |
43 |
38 |
0 |
| ODI |
0 |
56 |
99 |
113 |
120 |
58 |
94 |
2 |
| CDI |
0 |
28 |
103 |
151 |
191 |
175 |
325 |
7 |
| VCDI |
0 |
42 |
129 |
277 |
893 |
906 |
7790 |
6081 |
|
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