Validation of sea ice concentration
Bulletin date: 2023-05-04
Model vs. observations, sea ice class contingency tables
Date: 2023-04-28:
| 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 |
12552 |
6183 |
1195 |
609 |
136 |
71 |
46 |
0 |
| OW |
0 |
53 |
133 |
173 |
66 |
37 |
56 |
0 |
| VODI |
0 |
18 |
114 |
192 |
96 |
87 |
142 |
0 |
| ODI |
0 |
9 |
46 |
103 |
97 |
108 |
218 |
0 |
| CDI |
0 |
2 |
72 |
123 |
102 |
143 |
796 |
0 |
| VCDI |
0 |
0 |
48 |
253 |
262 |
690 |
9290 |
3838 |
|
...date precedes bulletin
|
Date: 2023-05-02:
| 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 |
12873 |
6473 |
976 |
687 |
120 |
45 |
15 |
0 |
| OW |
0 |
65 |
70 |
168 |
62 |
35 |
12 |
0 |
| VODI |
0 |
45 |
45 |
111 |
94 |
97 |
55 |
0 |
| ODI |
0 |
18 |
22 |
73 |
104 |
183 |
96 |
0 |
| CDI |
0 |
21 |
25 |
85 |
228 |
658 |
1139 |
1 |
| VCDI |
0 |
7 |
7 |
27 |
97 |
1440 |
7814 |
4066 |
|
...date precedes bulletin
|
Date: 2023-05-04:
| 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 |
12600 |
6574 |
1103 |
535 |
202 |
71 |
37 |
0 |
| OW |
0 |
38 |
106 |
105 |
101 |
64 |
34 |
0 |
| VODI |
0 |
27 |
20 |
45 |
109 |
102 |
111 |
0 |
| ODI |
0 |
16 |
12 |
40 |
87 |
145 |
181 |
3 |
| CDI |
0 |
16 |
18 |
33 |
144 |
491 |
1612 |
21 |
| VCDI |
0 |
5 |
21 |
39 |
80 |
490 |
8122 |
4599 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12600 |
6588 |
1136 |
560 |
208 |
75 |
44 |
0 |
| OW |
0 |
34 |
72 |
82 |
97 |
58 |
39 |
0 |
| VODI |
0 |
21 |
23 |
48 |
109 |
96 |
106 |
0 |
| ODI |
0 |
15 |
12 |
34 |
85 |
142 |
189 |
2 |
| CDI |
0 |
14 |
20 |
35 |
124 |
454 |
1498 |
20 |
| VCDI |
0 |
4 |
17 |
38 |
100 |
538 |
8221 |
4601 |
|
Date: 2023-05-08:
| 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 |
12960 |
6667 |
973 |
503 |
119 |
29 |
19 |
0 |
| OW |
0 |
8 |
87 |
117 |
73 |
39 |
31 |
0 |
| VODI |
0 |
5 |
28 |
123 |
148 |
92 |
88 |
0 |
| ODI |
0 |
4 |
7 |
67 |
133 |
238 |
188 |
0 |
| CDI |
0 |
2 |
14 |
60 |
140 |
1208 |
1280 |
0 |
| VCDI |
0 |
1 |
0 |
7 |
79 |
1213 |
6860 |
4549 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12960 |
6645 |
983 |
513 |
130 |
42 |
36 |
0 |
| OW |
0 |
5 |
63 |
119 |
73 |
47 |
46 |
0 |
| VODI |
0 |
12 |
28 |
89 |
104 |
76 |
107 |
0 |
| ODI |
0 |
16 |
7 |
51 |
113 |
155 |
204 |
0 |
| CDI |
0 |
8 |
20 |
66 |
136 |
769 |
929 |
12 |
| VCDI |
0 |
1 |
8 |
39 |
136 |
1730 |
7144 |
4537 |
|
Date: 2023-05-10:
| 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 |
13014 |
6694 |
1023 |
505 |
131 |
46 |
19 |
0 |
| OW |
0 |
12 |
57 |
141 |
70 |
40 |
32 |
0 |
| VODI |
0 |
9 |
23 |
96 |
137 |
116 |
90 |
0 |
| ODI |
0 |
6 |
15 |
63 |
121 |
163 |
251 |
0 |
| CDI |
0 |
2 |
19 |
85 |
130 |
590 |
1486 |
3 |
| VCDI |
0 |
1 |
1 |
24 |
76 |
1039 |
7168 |
4661 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13014 |
6678 |
1000 |
483 |
126 |
62 |
44 |
0 |
| OW |
0 |
8 |
53 |
121 |
61 |
42 |
42 |
0 |
| VODI |
0 |
6 |
33 |
115 |
99 |
69 |
105 |
0 |
| ODI |
0 |
19 |
18 |
53 |
110 |
127 |
258 |
3 |
| CDI |
0 |
12 |
22 |
84 |
157 |
391 |
1117 |
15 |
| VCDI |
0 |
1 |
12 |
58 |
112 |
1303 |
7480 |
4646 |
|
Date: 2023-05-12:
| 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 |
13369 |
6759 |
872 |
325 |
110 |
52 |
16 |
0 |
| OW |
0 |
24 |
111 |
85 |
77 |
75 |
47 |
0 |
| VODI |
0 |
5 |
62 |
80 |
94 |
131 |
110 |
0 |
| ODI |
0 |
7 |
38 |
33 |
91 |
170 |
248 |
0 |
| CDI |
0 |
0 |
11 |
45 |
96 |
385 |
1636 |
11 |
| VCDI |
0 |
1 |
8 |
25 |
46 |
534 |
8068 |
4302 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13369 |
6745 |
853 |
296 |
124 |
59 |
55 |
0 |
| OW |
0 |
24 |
82 |
87 |
53 |
55 |
56 |
0 |
| VODI |
0 |
16 |
75 |
70 |
59 |
89 |
126 |
0 |
| ODI |
0 |
10 |
50 |
48 |
78 |
130 |
237 |
5 |
| CDI |
0 |
1 |
24 |
49 |
119 |
330 |
1430 |
19 |
| VCDI |
0 |
0 |
18 |
43 |
81 |
684 |
8221 |
4289 |
|
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