Validation of sea ice concentration
Bulletin date: 2021-08-12
Model vs. observations, sea ice class contingency tables
Date: 2021-08-06:
| 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 |
21845 |
6199 |
2301 |
584 |
258 |
45 |
4 |
0 |
| OW |
0 |
0 |
89 |
129 |
124 |
60 |
16 |
0 |
| VODI |
0 |
0 |
22 |
85 |
195 |
190 |
56 |
0 |
| ODI |
0 |
0 |
1 |
38 |
189 |
472 |
459 |
5 |
| CDI |
0 |
0 |
0 |
10 |
81 |
518 |
2031 |
1745 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
125 |
282 |
|
...date precedes bulletin
|
Date: 2021-08-10:
| 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 |
22479 |
6316 |
1857 |
789 |
157 |
59 |
18 |
0 |
| OW |
0 |
7 |
60 |
165 |
115 |
56 |
8 |
0 |
| VODI |
0 |
1 |
18 |
115 |
206 |
259 |
48 |
0 |
| ODI |
0 |
0 |
5 |
64 |
197 |
963 |
798 |
0 |
| CDI |
0 |
0 |
0 |
9 |
24 |
369 |
1891 |
1023 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
20 |
63 |
|
...date precedes bulletin
|
Date: 2021-08-12:
| 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 |
22561 |
6480 |
1551 |
731 |
316 |
79 |
11 |
0 |
| OW |
0 |
2 |
54 |
145 |
133 |
68 |
8 |
0 |
| VODI |
0 |
0 |
12 |
62 |
279 |
294 |
69 |
0 |
| ODI |
0 |
0 |
3 |
41 |
212 |
898 |
895 |
2 |
| CDI |
0 |
0 |
0 |
8 |
29 |
418 |
1710 |
1014 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
14 |
60 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22561 |
6481 |
1561 |
738 |
316 |
79 |
12 |
0 |
| OW |
0 |
1 |
43 |
133 |
130 |
65 |
8 |
0 |
| VODI |
0 |
0 |
13 |
66 |
287 |
321 |
71 |
0 |
| ODI |
0 |
0 |
3 |
41 |
204 |
909 |
926 |
8 |
| CDI |
0 |
0 |
0 |
9 |
32 |
383 |
1673 |
986 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
17 |
82 |
|
Date: 2021-08-16:
| 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 |
23445 |
5879 |
1490 |
909 |
112 |
23 |
11 |
0 |
| OW |
0 |
26 |
48 |
224 |
78 |
38 |
5 |
0 |
| VODI |
0 |
8 |
22 |
197 |
355 |
145 |
111 |
0 |
| ODI |
0 |
0 |
0 |
39 |
200 |
456 |
503 |
0 |
| CDI |
0 |
0 |
0 |
4 |
23 |
2678 |
45 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
1076 |
9 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23445 |
5896 |
1426 |
852 |
122 |
38 |
12 |
0 |
| OW |
0 |
14 |
100 |
172 |
54 |
42 |
13 |
0 |
| VODI |
0 |
3 |
34 |
260 |
265 |
216 |
185 |
0 |
| ODI |
0 |
0 |
0 |
80 |
263 |
1080 |
453 |
0 |
| CDI |
0 |
0 |
0 |
9 |
64 |
3037 |
10 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3 |
11 |
0 |
|
Date: 2021-08-18:
| 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 |
23435 |
6108 |
1267 |
844 |
193 |
26 |
11 |
0 |
| OW |
0 |
16 |
81 |
179 |
100 |
22 |
7 |
0 |
| VODI |
0 |
9 |
17 |
218 |
394 |
182 |
37 |
0 |
| ODI |
0 |
1 |
1 |
50 |
241 |
492 |
329 |
0 |
| CDI |
0 |
0 |
0 |
1 |
36 |
195 |
2304 |
301 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
9 |
195 |
848 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23435 |
6078 |
1228 |
810 |
211 |
44 |
12 |
0 |
| OW |
0 |
44 |
80 |
134 |
71 |
30 |
22 |
0 |
| VODI |
0 |
4 |
55 |
247 |
323 |
188 |
202 |
0 |
| ODI |
0 |
6 |
2 |
86 |
295 |
450 |
891 |
1 |
| CDI |
0 |
2 |
1 |
15 |
72 |
213 |
1747 |
1148 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
1 |
9 |
0 |
|
Date: 2021-08-20:
| 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 |
23491 |
6221 |
1331 |
718 |
98 |
47 |
10 |
0 |
| OW |
0 |
36 |
73 |
201 |
95 |
36 |
7 |
0 |
| VODI |
0 |
0 |
26 |
271 |
336 |
172 |
54 |
0 |
| ODI |
0 |
0 |
1 |
63 |
219 |
448 |
300 |
0 |
| CDI |
0 |
0 |
0 |
6 |
38 |
212 |
2309 |
430 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
7 |
102 |
800 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23491 |
6164 |
1307 |
687 |
110 |
63 |
15 |
0 |
| OW |
0 |
72 |
58 |
134 |
69 |
33 |
40 |
0 |
| VODI |
0 |
21 |
59 |
296 |
288 |
178 |
179 |
0 |
| ODI |
0 |
0 |
7 |
114 |
251 |
419 |
879 |
8 |
| CDI |
0 |
0 |
0 |
28 |
68 |
223 |
1667 |
1222 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
6 |
2 |
0 |
|
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