Validation of sea ice concentration
Bulletin date: 2024-01-04
Model vs. observations, sea ice class contingency tables
Date: 2023-12-29:
| 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 |
13722 |
6661 |
451 |
185 |
38 |
6 |
1 |
0 |
| OW |
0 |
220 |
205 |
108 |
28 |
12 |
4 |
0 |
| VODI |
0 |
88 |
227 |
180 |
76 |
47 |
13 |
0 |
| ODI |
0 |
13 |
93 |
176 |
156 |
211 |
90 |
4 |
| CDI |
0 |
13 |
51 |
136 |
142 |
290 |
402 |
45 |
| VCDI |
0 |
2 |
111 |
220 |
241 |
872 |
8785 |
3834 |
|
...date precedes bulletin
|
Date: 2024-01-02:
| 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 |
13646 |
6518 |
825 |
189 |
53 |
0 |
0 |
0 |
| OW |
0 |
94 |
206 |
153 |
33 |
7 |
0 |
0 |
| VODI |
0 |
45 |
165 |
261 |
90 |
22 |
1 |
0 |
| ODI |
0 |
11 |
66 |
203 |
138 |
119 |
11 |
0 |
| CDI |
0 |
6 |
29 |
162 |
162 |
402 |
188 |
19 |
| VCDI |
0 |
3 |
17 |
238 |
407 |
1343 |
8783 |
3544 |
|
...date precedes bulletin
|
Date: 2024-01-04:
| 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 |
13132 |
6588 |
756 |
269 |
93 |
47 |
0 |
0 |
| OW |
0 |
51 |
195 |
77 |
81 |
80 |
3 |
0 |
| VODI |
0 |
17 |
183 |
117 |
102 |
97 |
21 |
0 |
| ODI |
0 |
5 |
88 |
172 |
85 |
131 |
72 |
1 |
| CDI |
0 |
0 |
35 |
124 |
139 |
207 |
366 |
24 |
| VCDI |
0 |
0 |
48 |
204 |
328 |
799 |
8882 |
4540 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13132 |
6614 |
788 |
292 |
121 |
87 |
1 |
0 |
| OW |
0 |
31 |
171 |
59 |
70 |
55 |
4 |
0 |
| VODI |
0 |
13 |
178 |
122 |
92 |
92 |
21 |
0 |
| ODI |
0 |
3 |
89 |
162 |
80 |
136 |
68 |
1 |
| CDI |
0 |
0 |
35 |
134 |
133 |
183 |
347 |
24 |
| VCDI |
0 |
0 |
44 |
194 |
332 |
808 |
8903 |
4540 |
|
Date: 2024-01-08:
| 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 |
12454 |
6361 |
1197 |
356 |
169 |
88 |
41 |
0 |
| OW |
0 |
26 |
163 |
109 |
80 |
63 |
50 |
0 |
| VODI |
0 |
3 |
94 |
123 |
67 |
108 |
125 |
0 |
| ODI |
0 |
0 |
44 |
116 |
59 |
110 |
205 |
0 |
| CDI |
0 |
0 |
22 |
87 |
82 |
192 |
513 |
59 |
| VCDI |
0 |
0 |
22 |
60 |
112 |
332 |
6274 |
8193 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12454 |
6298 |
1008 |
330 |
185 |
136 |
112 |
0 |
| OW |
0 |
39 |
161 |
61 |
42 |
48 |
77 |
0 |
| VODI |
0 |
19 |
147 |
74 |
56 |
53 |
130 |
0 |
| ODI |
0 |
32 |
113 |
111 |
42 |
78 |
131 |
2 |
| CDI |
0 |
2 |
64 |
126 |
78 |
165 |
297 |
75 |
| VCDI |
0 |
0 |
49 |
149 |
166 |
413 |
6461 |
8175 |
|
Date: 2024-01-10:
| 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 |
12473 |
6271 |
941 |
438 |
163 |
78 |
31 |
0 |
| OW |
0 |
62 |
132 |
120 |
82 |
54 |
38 |
0 |
| VODI |
0 |
37 |
127 |
144 |
73 |
100 |
70 |
0 |
| ODI |
0 |
4 |
52 |
134 |
79 |
94 |
99 |
2 |
| CDI |
0 |
0 |
16 |
67 |
92 |
142 |
292 |
67 |
| VCDI |
0 |
0 |
3 |
37 |
192 |
654 |
7963 |
6736 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12473 |
6236 |
814 |
398 |
173 |
133 |
80 |
0 |
| OW |
0 |
47 |
148 |
104 |
62 |
35 |
45 |
0 |
| VODI |
0 |
39 |
145 |
129 |
60 |
71 |
75 |
0 |
| ODI |
0 |
40 |
86 |
107 |
55 |
70 |
121 |
3 |
| CDI |
0 |
12 |
63 |
119 |
94 |
137 |
458 |
60 |
| VCDI |
0 |
0 |
15 |
83 |
237 |
676 |
7714 |
6742 |
|
Date: 2024-01-12:
| 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 |
12159 |
6173 |
915 |
450 |
252 |
142 |
29 |
0 |
| OW |
0 |
54 |
123 |
98 |
91 |
104 |
24 |
0 |
| VODI |
0 |
36 |
100 |
108 |
92 |
131 |
72 |
0 |
| ODI |
0 |
11 |
60 |
77 |
91 |
116 |
114 |
3 |
| CDI |
0 |
4 |
26 |
62 |
91 |
190 |
350 |
12 |
| VCDI |
0 |
1 |
13 |
46 |
99 |
266 |
7381 |
7993 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12159 |
6069 |
864 |
433 |
259 |
201 |
91 |
0 |
| OW |
0 |
75 |
101 |
93 |
83 |
105 |
40 |
0 |
| VODI |
0 |
60 |
71 |
80 |
81 |
117 |
109 |
0 |
| ODI |
0 |
35 |
86 |
70 |
65 |
69 |
153 |
3 |
| CDI |
0 |
29 |
65 |
83 |
85 |
142 |
494 |
32 |
| VCDI |
0 |
11 |
50 |
82 |
143 |
315 |
7083 |
7973 |
|
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