Validation of sea ice concentration
Bulletin date: 2021-12-09
Model vs. observations, sea ice class contingency tables
Date: 2021-12-03:
| 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 |
14414 |
6423 |
1302 |
432 |
223 |
150 |
233 |
0 |
| OW |
0 |
49 |
190 |
120 |
99 |
60 |
46 |
0 |
| VODI |
0 |
24 |
131 |
95 |
83 |
98 |
90 |
0 |
| ODI |
0 |
19 |
69 |
60 |
89 |
91 |
139 |
0 |
| CDI |
0 |
5 |
39 |
68 |
106 |
147 |
436 |
41 |
| VCDI |
0 |
3 |
10 |
33 |
69 |
199 |
5892 |
6382 |
|
...date precedes bulletin
|
Date: 2021-12-07:
| 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 |
14431 |
6215 |
1681 |
376 |
179 |
185 |
204 |
0 |
| OW |
0 |
13 |
183 |
119 |
84 |
78 |
14 |
0 |
| VODI |
0 |
6 |
114 |
121 |
85 |
146 |
42 |
0 |
| ODI |
0 |
0 |
38 |
81 |
99 |
156 |
97 |
0 |
| CDI |
0 |
0 |
20 |
64 |
86 |
174 |
460 |
25 |
| VCDI |
0 |
0 |
27 |
64 |
110 |
348 |
6105 |
5929 |
|
...date precedes bulletin
|
Date: 2021-12-09:
| 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 |
14577 |
6183 |
1363 |
445 |
241 |
114 |
196 |
0 |
| OW |
0 |
16 |
168 |
162 |
107 |
75 |
29 |
0 |
| VODI |
0 |
12 |
105 |
119 |
122 |
144 |
48 |
0 |
| ODI |
0 |
6 |
37 |
97 |
100 |
171 |
106 |
0 |
| CDI |
0 |
5 |
29 |
76 |
112 |
250 |
319 |
14 |
| VCDI |
0 |
3 |
37 |
83 |
162 |
395 |
6504 |
5427 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14577 |
6189 |
1410 |
477 |
248 |
147 |
201 |
0 |
| OW |
0 |
12 |
133 |
136 |
100 |
57 |
27 |
0 |
| VODI |
0 |
9 |
101 |
116 |
129 |
135 |
48 |
0 |
| ODI |
0 |
5 |
33 |
101 |
95 |
166 |
100 |
0 |
| CDI |
0 |
5 |
26 |
65 |
112 |
244 |
316 |
14 |
| VCDI |
0 |
5 |
36 |
87 |
160 |
400 |
6510 |
5427 |
|
Date: 2021-12-13:
| 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 |
14364 |
6164 |
1443 |
580 |
191 |
125 |
100 |
0 |
| OW |
0 |
25 |
204 |
198 |
113 |
60 |
10 |
0 |
| VODI |
0 |
15 |
79 |
183 |
139 |
168 |
43 |
0 |
| ODI |
0 |
5 |
35 |
85 |
122 |
208 |
132 |
1 |
| CDI |
0 |
2 |
27 |
63 |
88 |
285 |
588 |
40 |
| VCDI |
0 |
0 |
21 |
71 |
89 |
409 |
6704 |
4980 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14364 |
6142 |
1473 |
619 |
225 |
165 |
102 |
0 |
| OW |
0 |
15 |
142 |
144 |
91 |
92 |
11 |
0 |
| VODI |
0 |
22 |
68 |
145 |
114 |
139 |
72 |
0 |
| ODI |
0 |
15 |
40 |
67 |
75 |
158 |
119 |
0 |
| CDI |
0 |
13 |
41 |
88 |
88 |
201 |
291 |
28 |
| VCDI |
0 |
4 |
45 |
117 |
149 |
500 |
6982 |
4993 |
|
Date: 2021-12-15:
| 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 |
14857 |
6225 |
1131 |
366 |
189 |
123 |
115 |
0 |
| OW |
0 |
36 |
215 |
155 |
101 |
62 |
6 |
0 |
| VODI |
0 |
17 |
104 |
133 |
144 |
132 |
56 |
0 |
| ODI |
0 |
11 |
43 |
74 |
107 |
150 |
117 |
0 |
| CDI |
0 |
5 |
29 |
71 |
118 |
231 |
422 |
7 |
| VCDI |
0 |
6 |
45 |
83 |
122 |
263 |
6876 |
5212 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14857 |
6199 |
1112 |
390 |
234 |
134 |
113 |
0 |
| OW |
0 |
37 |
168 |
120 |
111 |
79 |
23 |
0 |
| VODI |
0 |
22 |
120 |
116 |
96 |
145 |
84 |
0 |
| ODI |
0 |
12 |
54 |
58 |
68 |
152 |
121 |
0 |
| CDI |
0 |
10 |
48 |
79 |
97 |
150 |
399 |
2 |
| VCDI |
0 |
20 |
65 |
119 |
175 |
301 |
6852 |
5217 |
|
Date: 2021-12-17:
| 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 |
15000 |
6178 |
958 |
360 |
120 |
95 |
136 |
0 |
| OW |
0 |
64 |
185 |
148 |
79 |
48 |
34 |
0 |
| VODI |
0 |
21 |
129 |
156 |
135 |
95 |
79 |
0 |
| ODI |
0 |
11 |
37 |
83 |
114 |
132 |
162 |
0 |
| CDI |
0 |
9 |
16 |
64 |
97 |
155 |
433 |
12 |
| VCDI |
0 |
6 |
51 |
64 |
146 |
295 |
7023 |
5229 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15000 |
6132 |
1003 |
405 |
165 |
131 |
175 |
0 |
| OW |
0 |
66 |
139 |
123 |
93 |
93 |
75 |
0 |
| VODI |
0 |
35 |
97 |
112 |
100 |
101 |
139 |
0 |
| ODI |
0 |
8 |
51 |
86 |
76 |
85 |
185 |
27 |
| CDI |
0 |
11 |
24 |
72 |
105 |
139 |
459 |
99 |
| VCDI |
0 |
37 |
62 |
77 |
152 |
271 |
6834 |
5115 |
|
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