Validation of sea ice concentration
Bulletin date: 2021-08-26
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2021-08-24:
| 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 |
23458 |
6020 |
1748 |
471 |
338 |
113 |
2 |
0 |
| OW |
0 |
0 |
70 |
171 |
156 |
43 |
6 |
0 |
| VODI |
0 |
0 |
16 |
143 |
269 |
258 |
105 |
0 |
| ODI |
0 |
0 |
0 |
29 |
57 |
259 |
613 |
0 |
| CDI |
0 |
0 |
0 |
4 |
4 |
48 |
2062 |
1271 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
0 |
199 |
225 |
|
...date precedes bulletin
|
Date: 2021-08-26:
| 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 |
23000 |
6366 |
1877 |
830 |
176 |
8 |
2 |
0 |
| OW |
0 |
1 |
68 |
263 |
98 |
26 |
5 |
0 |
| VODI |
0 |
0 |
36 |
249 |
273 |
179 |
71 |
0 |
| ODI |
0 |
0 |
1 |
62 |
126 |
324 |
442 |
0 |
| CDI |
0 |
0 |
0 |
4 |
20 |
125 |
1987 |
1149 |
| VCDI |
0 |
0 |
0 |
2 |
3 |
8 |
267 |
111 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23000 |
6361 |
1891 |
829 |
181 |
9 |
2 |
0 |
| OW |
0 |
6 |
47 |
267 |
97 |
29 |
6 |
0 |
| VODI |
0 |
0 |
43 |
255 |
281 |
171 |
70 |
0 |
| ODI |
0 |
0 |
1 |
51 |
107 |
318 |
399 |
0 |
| CDI |
0 |
0 |
0 |
6 |
29 |
137 |
2034 |
1148 |
| VCDI |
0 |
0 |
0 |
2 |
1 |
6 |
263 |
112 |
|
Date: 2021-08-30:
| 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 |
24151 |
5639 |
1848 |
760 |
160 |
31 |
2 |
0 |
| OW |
0 |
7 |
100 |
147 |
121 |
27 |
8 |
0 |
| VODI |
0 |
0 |
58 |
173 |
188 |
153 |
58 |
0 |
| ODI |
0 |
0 |
3 |
63 |
150 |
271 |
328 |
0 |
| CDI |
0 |
0 |
0 |
11 |
36 |
72 |
2027 |
1211 |
| VCDI |
0 |
0 |
0 |
6 |
2 |
1 |
241 |
106 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24151 |
5642 |
1788 |
567 |
100 |
29 |
5 |
0 |
| OW |
0 |
4 |
112 |
201 |
81 |
29 |
6 |
0 |
| VODI |
0 |
0 |
99 |
285 |
244 |
119 |
52 |
0 |
| ODI |
0 |
0 |
10 |
84 |
167 |
252 |
419 |
0 |
| CDI |
0 |
0 |
0 |
17 |
62 |
125 |
1926 |
1113 |
| VCDI |
0 |
0 |
0 |
6 |
3 |
1 |
256 |
204 |
|
Date: 2021-09-01:
| 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 |
23828 |
6173 |
1662 |
820 |
124 |
10 |
2 |
0 |
| OW |
0 |
22 |
84 |
182 |
65 |
20 |
10 |
0 |
| VODI |
0 |
5 |
42 |
188 |
173 |
108 |
53 |
0 |
| ODI |
0 |
0 |
2 |
72 |
167 |
289 |
277 |
0 |
| CDI |
0 |
0 |
0 |
8 |
45 |
118 |
2082 |
1102 |
| VCDI |
0 |
0 |
0 |
3 |
4 |
6 |
258 |
155 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23828 |
6094 |
1567 |
584 |
83 |
7 |
3 |
0 |
| OW |
0 |
69 |
98 |
176 |
49 |
19 |
9 |
0 |
| VODI |
0 |
35 |
91 |
361 |
192 |
93 |
47 |
0 |
| ODI |
0 |
2 |
34 |
131 |
160 |
228 |
245 |
0 |
| CDI |
0 |
0 |
0 |
18 |
88 |
193 |
1951 |
697 |
| VCDI |
0 |
0 |
0 |
3 |
6 |
11 |
427 |
560 |
|
Date: 2021-09-03:
| 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 |
24226 |
5600 |
1892 |
646 |
165 |
9 |
2 |
0 |
| OW |
0 |
22 |
87 |
145 |
93 |
21 |
16 |
0 |
| VODI |
0 |
0 |
68 |
134 |
175 |
153 |
56 |
0 |
| ODI |
0 |
0 |
1 |
44 |
126 |
274 |
304 |
0 |
| CDI |
0 |
0 |
0 |
0 |
18 |
73 |
2128 |
1178 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
8 |
257 |
238 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
24226 |
5537 |
1680 |
416 |
107 |
8 |
2 |
0 |
| OW |
0 |
47 |
123 |
137 |
43 |
9 |
3 |
0 |
| VODI |
0 |
37 |
159 |
267 |
190 |
79 |
32 |
0 |
| ODI |
0 |
1 |
83 |
121 |
150 |
191 |
179 |
0 |
| CDI |
0 |
0 |
3 |
28 |
73 |
218 |
1658 |
351 |
| VCDI |
0 |
0 |
0 |
0 |
14 |
33 |
889 |
1065 |
|
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