Validation of sea ice concentration
Bulletin date: 2023-08-10
Model vs. observations, sea ice class contingency tables
Date: 2023-08-04:
| 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 |
19905 |
6757 |
1380 |
823 |
332 |
74 |
19 |
0 |
| OW |
0 |
9 |
35 |
209 |
236 |
79 |
22 |
0 |
| VODI |
0 |
0 |
20 |
213 |
368 |
234 |
107 |
0 |
| ODI |
0 |
0 |
0 |
59 |
146 |
194 |
248 |
13 |
| CDI |
0 |
0 |
0 |
22 |
52 |
129 |
2111 |
1755 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
12 |
596 |
2000 |
|
...date precedes bulletin
|
Date: 2023-08-08:
| 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 |
20331 |
6996 |
1400 |
803 |
190 |
66 |
10 |
0 |
| OW |
0 |
0 |
50 |
230 |
123 |
34 |
10 |
0 |
| VODI |
0 |
0 |
12 |
275 |
365 |
195 |
84 |
0 |
| ODI |
0 |
0 |
1 |
59 |
121 |
202 |
393 |
41 |
| CDI |
0 |
0 |
3 |
10 |
33 |
88 |
1857 |
1545 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1 |
451 |
2179 |
|
...date precedes bulletin
|
Date: 2023-08-10:
| 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 |
21084 |
6474 |
1235 |
926 |
164 |
23 |
11 |
0 |
| OW |
0 |
0 |
35 |
204 |
168 |
52 |
14 |
0 |
| VODI |
0 |
0 |
4 |
222 |
334 |
216 |
105 |
0 |
| ODI |
0 |
0 |
1 |
38 |
122 |
179 |
367 |
66 |
| CDI |
0 |
0 |
0 |
12 |
44 |
98 |
1897 |
1580 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
445 |
2038 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21084 |
6473 |
1239 |
947 |
162 |
28 |
11 |
0 |
| OW |
0 |
1 |
30 |
202 |
188 |
41 |
19 |
0 |
| VODI |
0 |
0 |
5 |
196 |
321 |
221 |
98 |
0 |
| ODI |
0 |
0 |
1 |
46 |
114 |
172 |
355 |
39 |
| CDI |
0 |
0 |
0 |
11 |
47 |
104 |
1885 |
1566 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
2 |
471 |
2079 |
|
Date: 2023-08-14:
| 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 |
22633 |
5840 |
977 |
493 |
82 |
11 |
10 |
0 |
| OW |
0 |
11 |
91 |
195 |
162 |
27 |
9 |
0 |
| VODI |
0 |
0 |
116 |
165 |
267 |
92 |
94 |
0 |
| ODI |
0 |
0 |
3 |
54 |
110 |
328 |
351 |
0 |
| CDI |
0 |
0 |
0 |
20 |
44 |
282 |
2326 |
197 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
5 |
1160 |
2003 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22633 |
5813 |
952 |
521 |
127 |
17 |
13 |
0 |
| OW |
0 |
34 |
131 |
172 |
182 |
56 |
25 |
0 |
| VODI |
0 |
4 |
104 |
152 |
204 |
100 |
137 |
0 |
| ODI |
0 |
0 |
0 |
53 |
88 |
169 |
397 |
0 |
| CDI |
0 |
0 |
0 |
22 |
61 |
396 |
2767 |
238 |
| VCDI |
0 |
0 |
0 |
7 |
4 |
7 |
611 |
1962 |
|
Date: 2023-08-16:
| 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 |
22395 |
5947 |
782 |
899 |
168 |
12 |
9 |
0 |
| OW |
0 |
8 |
23 |
330 |
177 |
32 |
37 |
0 |
| VODI |
0 |
2 |
8 |
149 |
155 |
77 |
160 |
0 |
| ODI |
0 |
0 |
0 |
50 |
93 |
273 |
321 |
0 |
| CDI |
0 |
0 |
0 |
26 |
46 |
271 |
2544 |
183 |
| VCDI |
0 |
0 |
0 |
5 |
6 |
24 |
1274 |
1673 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22395 |
5927 |
760 |
877 |
201 |
19 |
13 |
0 |
| OW |
0 |
18 |
32 |
330 |
158 |
52 |
54 |
0 |
| VODI |
0 |
11 |
19 |
157 |
132 |
92 |
219 |
0 |
| ODI |
0 |
1 |
2 |
57 |
78 |
158 |
413 |
0 |
| CDI |
0 |
0 |
0 |
38 |
76 |
352 |
2707 |
215 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
16 |
939 |
1641 |
|
Date: 2023-08-18:
| 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 |
22425 |
5624 |
1136 |
713 |
309 |
40 |
9 |
0 |
| OW |
0 |
4 |
50 |
161 |
237 |
117 |
38 |
0 |
| VODI |
0 |
1 |
18 |
95 |
151 |
129 |
154 |
0 |
| ODI |
0 |
0 |
5 |
44 |
73 |
133 |
286 |
184 |
| CDI |
0 |
0 |
0 |
17 |
50 |
101 |
1966 |
1113 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3 |
885 |
1888 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22425 |
5613 |
1106 |
702 |
331 |
80 |
31 |
0 |
| OW |
0 |
14 |
70 |
155 |
220 |
116 |
80 |
0 |
| VODI |
0 |
2 |
29 |
109 |
136 |
120 |
198 |
0 |
| ODI |
0 |
0 |
4 |
41 |
71 |
117 |
407 |
110 |
| CDI |
0 |
0 |
0 |
23 |
62 |
87 |
1878 |
1435 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3 |
744 |
1640 |
|
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