Validation of sea ice concentration
Bulletin date: 2023-10-05
Model vs. observations, sea ice class contingency tables
Date: 2023-09-29:
| 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 |
23787 |
4776 |
855 |
566 |
136 |
31 |
3 |
0 |
| OW |
0 |
33 |
56 |
152 |
55 |
13 |
5 |
0 |
| VODI |
0 |
6 |
26 |
147 |
98 |
45 |
12 |
0 |
| ODI |
0 |
3 |
18 |
64 |
137 |
89 |
39 |
0 |
| CDI |
0 |
0 |
8 |
23 |
136 |
226 |
180 |
0 |
| VCDI |
0 |
0 |
0 |
6 |
78 |
237 |
2465 |
3648 |
|
...date precedes bulletin
|
Date: 2023-10-03:
| 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 |
23664 |
5096 |
612 |
458 |
104 |
29 |
9 |
0 |
| OW |
0 |
29 |
78 |
78 |
14 |
12 |
2 |
0 |
| VODI |
0 |
8 |
51 |
93 |
51 |
27 |
8 |
0 |
| ODI |
0 |
1 |
16 |
95 |
56 |
61 |
17 |
0 |
| CDI |
0 |
0 |
12 |
105 |
120 |
139 |
84 |
0 |
| VCDI |
0 |
0 |
9 |
69 |
134 |
546 |
2860 |
3412 |
|
...date precedes bulletin
|
Date: 2023-10-05:
| 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 |
23186 |
5275 |
613 |
413 |
218 |
111 |
12 |
0 |
| OW |
0 |
44 |
92 |
63 |
27 |
18 |
4 |
0 |
| VODI |
0 |
16 |
55 |
81 |
59 |
30 |
5 |
0 |
| ODI |
0 |
2 |
23 |
44 |
48 |
89 |
5 |
0 |
| CDI |
0 |
0 |
14 |
65 |
48 |
244 |
45 |
0 |
| VCDI |
0 |
0 |
0 |
26 |
74 |
797 |
2989 |
3324 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23186 |
5301 |
660 |
428 |
218 |
112 |
15 |
0 |
| OW |
0 |
23 |
65 |
65 |
28 |
15 |
1 |
0 |
| VODI |
0 |
9 |
43 |
68 |
66 |
33 |
5 |
0 |
| ODI |
0 |
4 |
16 |
44 |
38 |
90 |
6 |
0 |
| CDI |
0 |
0 |
13 |
73 |
67 |
227 |
46 |
0 |
| VCDI |
0 |
0 |
0 |
14 |
57 |
812 |
2987 |
3324 |
|
Date: 2023-10-09:
| 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 |
22652 |
5362 |
864 |
377 |
200 |
257 |
14 |
0 |
| OW |
0 |
11 |
86 |
93 |
56 |
49 |
13 |
0 |
| VODI |
0 |
3 |
46 |
78 |
78 |
90 |
21 |
0 |
| ODI |
0 |
0 |
35 |
33 |
34 |
72 |
44 |
0 |
| CDI |
0 |
0 |
13 |
55 |
63 |
204 |
322 |
0 |
| VCDI |
0 |
0 |
0 |
10 |
53 |
307 |
3833 |
2731 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22652 |
5315 |
751 |
341 |
215 |
290 |
31 |
0 |
| OW |
0 |
27 |
113 |
73 |
41 |
34 |
10 |
0 |
| VODI |
0 |
23 |
71 |
85 |
34 |
33 |
9 |
0 |
| ODI |
0 |
9 |
41 |
39 |
46 |
57 |
13 |
0 |
| CDI |
0 |
2 |
59 |
61 |
73 |
145 |
90 |
0 |
| VCDI |
0 |
0 |
9 |
47 |
75 |
420 |
4094 |
2731 |
|
Date: 2023-10-11:
| 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 |
23584 |
4651 |
556 |
453 |
205 |
102 |
30 |
0 |
| OW |
0 |
43 |
99 |
100 |
40 |
31 |
16 |
0 |
| VODI |
0 |
17 |
79 |
100 |
77 |
38 |
26 |
0 |
| ODI |
0 |
9 |
22 |
79 |
31 |
38 |
35 |
0 |
| CDI |
0 |
5 |
24 |
50 |
51 |
109 |
134 |
0 |
| VCDI |
0 |
0 |
6 |
21 |
50 |
244 |
3930 |
3074 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23584 |
4517 |
471 |
430 |
207 |
119 |
46 |
0 |
| OW |
0 |
93 |
81 |
72 |
42 |
27 |
9 |
0 |
| VODI |
0 |
55 |
77 |
95 |
49 |
23 |
9 |
0 |
| ODI |
0 |
34 |
52 |
54 |
23 |
20 |
21 |
0 |
| CDI |
0 |
25 |
72 |
73 |
35 |
51 |
45 |
0 |
| VCDI |
0 |
1 |
33 |
79 |
98 |
322 |
4041 |
3074 |
|
Date: 2023-10-13:
| 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 |
23378 |
4767 |
576 |
304 |
224 |
138 |
2 |
0 |
| OW |
1 |
72 |
117 |
83 |
42 |
53 |
4 |
0 |
| VODI |
0 |
16 |
102 |
120 |
62 |
59 |
12 |
0 |
| ODI |
0 |
2 |
55 |
51 |
34 |
51 |
21 |
0 |
| CDI |
0 |
0 |
39 |
34 |
37 |
77 |
71 |
0 |
| VCDI |
0 |
0 |
8 |
26 |
41 |
307 |
3930 |
3243 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23379 |
4584 |
468 |
262 |
221 |
148 |
5 |
0 |
| OW |
0 |
120 |
103 |
54 |
12 |
50 |
9 |
0 |
| VODI |
0 |
84 |
131 |
97 |
42 |
33 |
19 |
0 |
| ODI |
0 |
30 |
53 |
58 |
37 |
34 |
14 |
0 |
| CDI |
0 |
36 |
54 |
56 |
24 |
61 |
31 |
0 |
| VCDI |
0 |
3 |
88 |
91 |
104 |
359 |
3962 |
3243 |
|
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