Validation of sea ice concentration
Bulletin date: 2021-08-19
Model vs. observations, sea ice class contingency tables
Date: 2021-08-13:
| 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 |
22546 |
6460 |
1639 |
697 |
291 |
64 |
11 |
0 |
| OW |
0 |
0 |
66 |
126 |
152 |
65 |
9 |
0 |
| VODI |
0 |
0 |
15 |
63 |
278 |
317 |
70 |
0 |
| ODI |
0 |
0 |
2 |
40 |
216 |
904 |
909 |
13 |
| CDI |
0 |
0 |
0 |
2 |
33 |
406 |
1691 |
1005 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
12 |
57 |
|
...date precedes bulletin
|
Date: 2021-08-17:
| 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 |
23460 |
6121 |
1352 |
832 |
105 |
21 |
10 |
0 |
| OW |
0 |
31 |
68 |
194 |
83 |
23 |
4 |
0 |
| VODI |
0 |
14 |
35 |
247 |
340 |
162 |
36 |
0 |
| ODI |
0 |
0 |
1 |
70 |
249 |
508 |
336 |
0 |
| CDI |
0 |
0 |
0 |
4 |
28 |
166 |
2264 |
299 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
9 |
219 |
857 |
|
...date precedes bulletin
|
Date: 2021-08-19:
| 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 |
23367 |
6236 |
1258 |
822 |
140 |
50 |
12 |
0 |
| OW |
0 |
42 |
73 |
179 |
105 |
39 |
3 |
0 |
| VODI |
0 |
0 |
28 |
231 |
369 |
192 |
33 |
0 |
| ODI |
0 |
0 |
0 |
56 |
235 |
465 |
313 |
0 |
| CDI |
0 |
0 |
0 |
1 |
42 |
191 |
2294 |
377 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
11 |
137 |
855 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23367 |
6234 |
1280 |
857 |
164 |
58 |
12 |
0 |
| OW |
0 |
44 |
58 |
156 |
100 |
28 |
2 |
0 |
| VODI |
0 |
0 |
20 |
216 |
349 |
218 |
45 |
0 |
| ODI |
0 |
0 |
1 |
59 |
235 |
426 |
289 |
0 |
| CDI |
0 |
0 |
0 |
1 |
44 |
209 |
2288 |
444 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
9 |
156 |
788 |
|
Date: 2021-08-23:
| 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 |
23487 |
5988 |
1838 |
495 |
245 |
39 |
6 |
0 |
| OW |
0 |
0 |
83 |
211 |
132 |
28 |
5 |
0 |
| VODI |
0 |
0 |
22 |
178 |
276 |
223 |
113 |
0 |
| ODI |
0 |
0 |
0 |
36 |
61 |
193 |
683 |
0 |
| CDI |
0 |
0 |
0 |
4 |
3 |
55 |
1942 |
1297 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
240 |
275 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23487 |
5974 |
1816 |
480 |
258 |
45 |
6 |
0 |
| OW |
0 |
14 |
81 |
133 |
104 |
39 |
12 |
0 |
| VODI |
0 |
0 |
42 |
242 |
250 |
188 |
178 |
0 |
| ODI |
0 |
0 |
4 |
59 |
96 |
183 |
548 |
0 |
| CDI |
0 |
0 |
0 |
10 |
9 |
83 |
2231 |
1042 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
14 |
530 |
|
Date: 2021-08-25:
| 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 |
23224 |
6031 |
1951 |
622 |
293 |
63 |
3 |
0 |
| OW |
0 |
0 |
71 |
192 |
155 |
46 |
11 |
0 |
| VODI |
0 |
0 |
24 |
184 |
262 |
221 |
114 |
0 |
| ODI |
0 |
0 |
0 |
40 |
74 |
235 |
593 |
0 |
| CDI |
0 |
0 |
0 |
6 |
22 |
69 |
2125 |
1144 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
180 |
204 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23224 |
6023 |
1886 |
561 |
287 |
72 |
5 |
0 |
| OW |
0 |
6 |
93 |
158 |
112 |
50 |
11 |
0 |
| VODI |
0 |
2 |
59 |
241 |
285 |
180 |
141 |
0 |
| ODI |
0 |
0 |
8 |
67 |
90 |
203 |
468 |
0 |
| CDI |
0 |
0 |
0 |
17 |
31 |
129 |
2384 |
971 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
17 |
377 |
|
Date: 2021-08-27:
| 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 |
23097 |
6655 |
1641 |
725 |
145 |
5 |
3 |
0 |
| OW |
0 |
10 |
90 |
243 |
93 |
21 |
7 |
0 |
| VODI |
0 |
0 |
44 |
297 |
263 |
127 |
54 |
0 |
| ODI |
0 |
0 |
1 |
84 |
146 |
318 |
456 |
0 |
| CDI |
0 |
0 |
0 |
1 |
26 |
124 |
1912 |
1157 |
| VCDI |
0 |
0 |
0 |
3 |
10 |
15 |
299 |
87 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23097 |
6587 |
1564 |
612 |
154 |
10 |
3 |
0 |
| OW |
0 |
64 |
92 |
235 |
83 |
19 |
7 |
0 |
| VODI |
0 |
14 |
96 |
358 |
225 |
107 |
60 |
0 |
| ODI |
0 |
0 |
24 |
135 |
157 |
237 |
265 |
0 |
| CDI |
0 |
0 |
0 |
11 |
62 |
231 |
2298 |
872 |
| VCDI |
0 |
0 |
0 |
2 |
2 |
6 |
98 |
372 |
|
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