Validation of sea ice concentration
Bulletin date: 2023-09-28
Model vs. observations, sea ice class contingency tables
Date: 2023-09-22:
| 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 |
23086 |
5459 |
1029 |
697 |
275 |
76 |
5 |
0 |
| OW |
0 |
1 |
33 |
107 |
113 |
58 |
5 |
0 |
| VODI |
0 |
0 |
24 |
80 |
192 |
123 |
7 |
0 |
| ODI |
0 |
0 |
5 |
32 |
164 |
350 |
51 |
0 |
| CDI |
0 |
0 |
1 |
11 |
115 |
603 |
1548 |
14 |
| VCDI |
0 |
0 |
0 |
4 |
30 |
13 |
1695 |
2153 |
|
...date precedes bulletin
|
Date: 2023-09-26:
| 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 |
22939 |
5218 |
1343 |
570 |
216 |
87 |
5 |
0 |
| OW |
0 |
2 |
40 |
101 |
59 |
45 |
5 |
0 |
| VODI |
0 |
0 |
29 |
101 |
171 |
108 |
19 |
0 |
| ODI |
0 |
0 |
9 |
31 |
180 |
217 |
35 |
0 |
| CDI |
0 |
0 |
1 |
5 |
115 |
446 |
364 |
5 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
44 |
2309 |
3329 |
|
...date precedes bulletin
|
Date: 2023-09-28:
| 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 |
23760 |
4785 |
882 |
616 |
144 |
34 |
6 |
0 |
| OW |
0 |
20 |
39 |
148 |
58 |
25 |
2 |
0 |
| VODI |
0 |
0 |
16 |
161 |
119 |
39 |
19 |
0 |
| ODI |
0 |
0 |
11 |
63 |
161 |
114 |
48 |
0 |
| CDI |
0 |
0 |
4 |
26 |
153 |
250 |
272 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
59 |
226 |
2440 |
3459 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23760 |
4796 |
883 |
621 |
145 |
38 |
6 |
0 |
| OW |
0 |
9 |
37 |
140 |
53 |
23 |
2 |
0 |
| VODI |
0 |
0 |
16 |
145 |
113 |
28 |
16 |
0 |
| ODI |
0 |
0 |
13 |
81 |
160 |
107 |
47 |
0 |
| CDI |
0 |
0 |
3 |
26 |
167 |
247 |
264 |
0 |
| VCDI |
0 |
0 |
0 |
1 |
56 |
245 |
2452 |
3459 |
|
Date: 2023-10-02:
| 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 |
23658 |
5113 |
637 |
478 |
100 |
35 |
6 |
0 |
| OW |
0 |
13 |
60 |
95 |
27 |
17 |
1 |
0 |
| VODI |
0 |
1 |
37 |
110 |
58 |
32 |
3 |
0 |
| ODI |
0 |
0 |
18 |
93 |
60 |
47 |
31 |
0 |
| CDI |
0 |
0 |
6 |
101 |
145 |
150 |
127 |
0 |
| VCDI |
0 |
0 |
8 |
55 |
133 |
605 |
2756 |
3343 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23658 |
5062 |
604 |
527 |
134 |
52 |
6 |
0 |
| OW |
0 |
23 |
63 |
81 |
34 |
18 |
6 |
0 |
| VODI |
0 |
15 |
31 |
128 |
68 |
39 |
15 |
0 |
| ODI |
0 |
11 |
14 |
95 |
68 |
54 |
31 |
0 |
| CDI |
0 |
6 |
19 |
63 |
111 |
136 |
81 |
0 |
| VCDI |
0 |
10 |
35 |
38 |
108 |
587 |
2785 |
3343 |
|
Date: 2023-10-04:
| 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 |
23273 |
5263 |
698 |
443 |
160 |
55 |
7 |
0 |
| OW |
0 |
30 |
111 |
46 |
25 |
15 |
1 |
0 |
| VODI |
0 |
8 |
54 |
87 |
52 |
36 |
9 |
0 |
| ODI |
0 |
0 |
25 |
40 |
58 |
101 |
7 |
0 |
| CDI |
0 |
0 |
14 |
59 |
71 |
241 |
48 |
0 |
| VCDI |
0 |
0 |
1 |
25 |
101 |
685 |
2939 |
3371 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23273 |
5208 |
652 |
424 |
167 |
103 |
16 |
0 |
| OW |
0 |
39 |
122 |
60 |
44 |
56 |
0 |
0 |
| VODI |
0 |
22 |
48 |
63 |
49 |
70 |
7 |
0 |
| ODI |
0 |
13 |
24 |
45 |
45 |
136 |
16 |
0 |
| CDI |
0 |
11 |
27 |
60 |
61 |
264 |
50 |
0 |
| VCDI |
0 |
8 |
30 |
48 |
101 |
504 |
2922 |
3371 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22826 |
5280 |
706 |
476 |
216 |
162 |
16 |
0 |
| OW |
0 |
68 |
85 |
89 |
60 |
56 |
2 |
0 |
| VODI |
0 |
37 |
45 |
58 |
39 |
72 |
0 |
0 |
| ODI |
0 |
32 |
18 |
45 |
39 |
113 |
8 |
0 |
| CDI |
0 |
29 |
24 |
69 |
54 |
254 |
61 |
0 |
| VCDI |
0 |
16 |
47 |
70 |
92 |
526 |
3027 |
3342 |
|
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