Validation of sea ice concentration
Bulletin date: 2023-08-31
Model vs. observations, sea ice class contingency tables
Date: 2023-08-25:
| 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 |
22635 |
5620 |
1249 |
842 |
233 |
68 |
9 |
0 |
| OW |
0 |
8 |
40 |
194 |
109 |
83 |
19 |
0 |
| VODI |
0 |
0 |
24 |
143 |
161 |
187 |
92 |
0 |
| ODI |
0 |
0 |
4 |
66 |
130 |
189 |
406 |
65 |
| CDI |
0 |
0 |
0 |
31 |
90 |
184 |
2333 |
618 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
13 |
862 |
1452 |
|
...date precedes bulletin
|
Date: 2023-08-29:
| 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 |
23123 |
5172 |
1220 |
942 |
142 |
53 |
16 |
0 |
| OW |
0 |
1 |
33 |
202 |
127 |
42 |
10 |
0 |
| VODI |
0 |
0 |
19 |
150 |
244 |
170 |
34 |
0 |
| ODI |
0 |
0 |
6 |
62 |
175 |
472 |
552 |
50 |
| CDI |
0 |
0 |
0 |
18 |
88 |
195 |
2183 |
939 |
| VCDI |
0 |
0 |
0 |
1 |
5 |
14 |
950 |
749 |
|
...date precedes bulletin
|
Date: 2023-08-31:
| 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 |
22865 |
5172 |
1352 |
819 |
416 |
101 |
2 |
0 |
| OW |
0 |
0 |
31 |
128 |
192 |
94 |
20 |
0 |
| VODI |
0 |
0 |
17 |
84 |
244 |
218 |
69 |
0 |
| ODI |
0 |
0 |
2 |
50 |
92 |
362 |
686 |
64 |
| CDI |
0 |
0 |
0 |
10 |
67 |
134 |
2087 |
1198 |
| VCDI |
0 |
0 |
0 |
0 |
4 |
12 |
855 |
712 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22865 |
5172 |
1351 |
816 |
439 |
120 |
3 |
0 |
| OW |
0 |
0 |
29 |
127 |
160 |
89 |
22 |
0 |
| VODI |
0 |
0 |
20 |
85 |
228 |
196 |
63 |
0 |
| ODI |
0 |
0 |
2 |
54 |
108 |
357 |
665 |
55 |
| CDI |
0 |
0 |
0 |
9 |
71 |
138 |
2066 |
1201 |
| VCDI |
0 |
0 |
0 |
0 |
9 |
21 |
900 |
718 |
|
Date: 2023-09-04:
| 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 |
23633 |
4906 |
1264 |
972 |
206 |
9 |
0 |
0 |
| OW |
0 |
5 |
22 |
207 |
188 |
39 |
2 |
0 |
| VODI |
0 |
3 |
14 |
157 |
268 |
169 |
93 |
0 |
| ODI |
0 |
0 |
0 |
51 |
196 |
290 |
782 |
142 |
| CDI |
0 |
0 |
0 |
18 |
47 |
162 |
1954 |
1711 |
| VCDI |
0 |
0 |
0 |
0 |
8 |
2 |
339 |
300 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23633 |
4888 |
1231 |
963 |
252 |
19 |
0 |
0 |
| OW |
0 |
21 |
46 |
190 |
157 |
45 |
5 |
0 |
| VODI |
0 |
4 |
20 |
114 |
222 |
118 |
78 |
0 |
| ODI |
0 |
1 |
3 |
90 |
179 |
244 |
392 |
84 |
| CDI |
0 |
0 |
0 |
45 |
86 |
242 |
2047 |
1269 |
| VCDI |
0 |
0 |
0 |
3 |
17 |
3 |
648 |
800 |
|
Date: 2023-09-06:
| 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 |
23745 |
5072 |
1058 |
784 |
336 |
115 |
13 |
0 |
| OW |
0 |
2 |
21 |
113 |
213 |
61 |
27 |
0 |
| VODI |
0 |
0 |
14 |
70 |
205 |
211 |
172 |
0 |
| ODI |
0 |
0 |
0 |
44 |
85 |
305 |
893 |
112 |
| CDI |
0 |
0 |
0 |
18 |
51 |
99 |
1501 |
1427 |
| VCDI |
0 |
0 |
0 |
1 |
22 |
21 |
715 |
633 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23745 |
5048 |
1010 |
727 |
350 |
131 |
33 |
0 |
| OW |
0 |
24 |
51 |
122 |
188 |
59 |
24 |
0 |
| VODI |
0 |
2 |
29 |
75 |
176 |
170 |
139 |
0 |
| ODI |
0 |
0 |
3 |
70 |
107 |
247 |
453 |
81 |
| CDI |
0 |
0 |
0 |
34 |
53 |
167 |
1882 |
1238 |
| VCDI |
0 |
0 |
0 |
2 |
38 |
38 |
790 |
853 |
|
Date: 2023-09-08:
| 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 |
23677 |
5349 |
1097 |
784 |
210 |
12 |
0 |
0 |
| OW |
0 |
3 |
47 |
185 |
183 |
33 |
14 |
0 |
| VODI |
0 |
0 |
24 |
108 |
219 |
152 |
115 |
0 |
| ODI |
0 |
0 |
0 |
30 |
148 |
422 |
847 |
0 |
| CDI |
0 |
0 |
0 |
4 |
21 |
83 |
1706 |
931 |
| VCDI |
0 |
0 |
0 |
4 |
20 |
61 |
631 |
1039 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23677 |
5314 |
1033 |
810 |
243 |
26 |
7 |
0 |
| OW |
0 |
37 |
66 |
127 |
135 |
55 |
25 |
0 |
| VODI |
0 |
1 |
59 |
111 |
200 |
147 |
117 |
0 |
| ODI |
0 |
0 |
8 |
55 |
133 |
237 |
434 |
0 |
| CDI |
0 |
0 |
2 |
7 |
67 |
219 |
1949 |
790 |
| VCDI |
0 |
0 |
0 |
5 |
23 |
79 |
781 |
1180 |
|
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