Validation of sea ice concentration
Bulletin date: 2023-10-12
Model vs. observations, sea ice class contingency tables
Date: 2023-10-06:
| 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 |
22826 |
5340 |
734 |
486 |
243 |
127 |
9 |
0 |
| OW |
0 |
62 |
72 |
70 |
27 |
21 |
1 |
0 |
| VODI |
0 |
39 |
65 |
90 |
30 |
31 |
6 |
0 |
| ODI |
0 |
11 |
21 |
54 |
53 |
52 |
3 |
0 |
| CDI |
0 |
9 |
19 |
61 |
48 |
223 |
27 |
2 |
| VCDI |
0 |
1 |
14 |
46 |
99 |
729 |
3068 |
3340 |
|
...date precedes bulletin
|
Date: 2023-10-10:
| 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 |
22698 |
5327 |
818 |
483 |
213 |
116 |
32 |
0 |
| OW |
0 |
9 |
91 |
106 |
52 |
51 |
18 |
0 |
| VODI |
0 |
5 |
38 |
97 |
73 |
82 |
23 |
0 |
| ODI |
0 |
0 |
23 |
32 |
42 |
50 |
39 |
0 |
| CDI |
0 |
0 |
35 |
28 |
48 |
141 |
225 |
0 |
| VCDI |
0 |
0 |
2 |
13 |
28 |
233 |
3939 |
2949 |
|
...date precedes bulletin
|
Date: 2023-10-12:
| 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 |
23587 |
4702 |
530 |
313 |
140 |
162 |
46 |
0 |
| OW |
0 |
61 |
95 |
91 |
42 |
43 |
18 |
0 |
| VODI |
0 |
13 |
91 |
83 |
71 |
61 |
20 |
0 |
| ODI |
0 |
9 |
30 |
72 |
36 |
44 |
21 |
0 |
| CDI |
0 |
2 |
25 |
45 |
52 |
63 |
90 |
0 |
| VCDI |
0 |
0 |
1 |
37 |
51 |
272 |
4045 |
3095 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23587 |
4688 |
524 |
291 |
138 |
162 |
52 |
0 |
| OW |
0 |
63 |
80 |
85 |
31 |
30 |
14 |
0 |
| VODI |
0 |
23 |
107 |
85 |
65 |
64 |
17 |
0 |
| ODI |
0 |
11 |
32 |
83 |
49 |
40 |
20 |
0 |
| CDI |
0 |
2 |
28 |
54 |
40 |
55 |
92 |
0 |
| VCDI |
0 |
0 |
1 |
43 |
69 |
294 |
4045 |
3095 |
|
Date: 2023-10-16:
| 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 |
23779 |
4586 |
492 |
332 |
193 |
90 |
0 |
0 |
| OW |
110 |
56 |
94 |
88 |
41 |
43 |
0 |
0 |
| VODI |
3 |
19 |
37 |
113 |
59 |
53 |
1 |
0 |
| ODI |
0 |
15 |
22 |
68 |
45 |
99 |
19 |
0 |
| CDI |
0 |
1 |
34 |
60 |
64 |
135 |
165 |
0 |
| VCDI |
0 |
0 |
2 |
46 |
107 |
622 |
4032 |
2434 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23748 |
4391 |
313 |
215 |
181 |
163 |
0 |
0 |
| OW |
144 |
123 |
76 |
55 |
20 |
25 |
0 |
0 |
| VODI |
0 |
74 |
151 |
132 |
38 |
39 |
0 |
0 |
| ODI |
0 |
49 |
66 |
109 |
51 |
33 |
2 |
0 |
| CDI |
0 |
31 |
29 |
78 |
61 |
74 |
36 |
0 |
| VCDI |
0 |
9 |
46 |
118 |
158 |
708 |
4179 |
2434 |
|
Date: 2023-10-18:
| 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 |
22512 |
5403 |
508 |
255 |
208 |
172 |
20 |
0 |
| OW |
274 |
31 |
53 |
76 |
77 |
91 |
20 |
0 |
| VODI |
10 |
14 |
53 |
48 |
89 |
117 |
30 |
0 |
| ODI |
0 |
9 |
28 |
35 |
44 |
93 |
62 |
0 |
| CDI |
0 |
3 |
27 |
36 |
59 |
195 |
125 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
66 |
556 |
3771 |
2980 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22549 |
5260 |
395 |
193 |
143 |
178 |
43 |
0 |
| OW |
232 |
98 |
90 |
36 |
40 |
20 |
18 |
0 |
| VODI |
15 |
50 |
89 |
97 |
93 |
59 |
36 |
0 |
| ODI |
0 |
20 |
38 |
56 |
94 |
116 |
27 |
0 |
| CDI |
0 |
25 |
26 |
40 |
71 |
147 |
94 |
0 |
| VCDI |
0 |
7 |
31 |
37 |
102 |
704 |
3810 |
2980 |
|
Date: 2023-10-20:
| 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 |
5627 |
650 |
303 |
129 |
95 |
50 |
0 |
| OW |
49 |
234 |
120 |
123 |
74 |
59 |
43 |
0 |
| VODI |
2 |
3 |
48 |
92 |
96 |
146 |
47 |
0 |
| ODI |
0 |
0 |
15 |
50 |
57 |
122 |
64 |
0 |
| CDI |
0 |
0 |
14 |
38 |
59 |
179 |
176 |
0 |
| VCDI |
0 |
0 |
6 |
17 |
66 |
406 |
3747 |
3296 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21900 |
5644 |
608 |
321 |
148 |
122 |
100 |
0 |
| OW |
7 |
195 |
116 |
95 |
57 |
37 |
32 |
0 |
| VODI |
1 |
25 |
98 |
101 |
87 |
99 |
63 |
0 |
| ODI |
0 |
0 |
23 |
62 |
62 |
143 |
77 |
0 |
| CDI |
0 |
0 |
4 |
28 |
57 |
153 |
184 |
0 |
| VCDI |
0 |
0 |
4 |
16 |
70 |
453 |
3671 |
3296 |
|
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