Validation of sea ice concentration
Bulletin date: 2021-03-11
Model vs. observations, sea ice class contingency tables
Date: 2021-03-05:
| 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 |
12302 |
5637 |
981 |
442 |
255 |
85 |
15 |
0 |
| OW |
0 |
6 |
98 |
124 |
134 |
76 |
14 |
0 |
| VODI |
0 |
3 |
68 |
101 |
173 |
124 |
32 |
0 |
| ODI |
0 |
2 |
24 |
77 |
188 |
191 |
71 |
0 |
| CDI |
0 |
0 |
26 |
106 |
247 |
557 |
482 |
27 |
| VCDI |
0 |
0 |
15 |
131 |
347 |
928 |
9759 |
4311 |
|
...date precedes bulletin
|
Date: 2021-03-09:
| 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 |
12273 |
5476 |
1144 |
396 |
204 |
101 |
73 |
0 |
| OW |
0 |
6 |
108 |
143 |
71 |
31 |
48 |
0 |
| VODI |
0 |
0 |
58 |
133 |
126 |
70 |
85 |
0 |
| ODI |
0 |
0 |
30 |
56 |
102 |
105 |
116 |
3 |
| CDI |
0 |
0 |
25 |
50 |
110 |
174 |
403 |
21 |
| VCDI |
0 |
0 |
14 |
77 |
148 |
563 |
7359 |
8257 |
|
...date precedes bulletin
|
Date: 2021-03-11:
| 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 |
12452 |
5607 |
1121 |
388 |
85 |
52 |
19 |
0 |
| OW |
0 |
8 |
158 |
128 |
63 |
44 |
18 |
0 |
| VODI |
0 |
1 |
82 |
151 |
84 |
76 |
59 |
0 |
| ODI |
0 |
2 |
30 |
91 |
65 |
98 |
97 |
2 |
| CDI |
0 |
0 |
10 |
84 |
74 |
148 |
386 |
99 |
| VCDI |
0 |
2 |
6 |
154 |
197 |
459 |
7617 |
7942 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12452 |
5608 |
1139 |
397 |
89 |
57 |
18 |
0 |
| OW |
0 |
7 |
137 |
111 |
60 |
42 |
18 |
0 |
| VODI |
0 |
1 |
86 |
161 |
78 |
74 |
56 |
0 |
| ODI |
0 |
2 |
31 |
95 |
65 |
97 |
96 |
2 |
| CDI |
0 |
1 |
8 |
86 |
79 |
140 |
409 |
96 |
| VCDI |
0 |
1 |
6 |
146 |
197 |
467 |
7599 |
7945 |
|
Date: 2021-03-15:
| 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 |
12556 |
5467 |
896 |
349 |
208 |
89 |
8 |
0 |
| OW |
0 |
12 |
158 |
128 |
73 |
51 |
18 |
0 |
| VODI |
0 |
0 |
101 |
138 |
121 |
74 |
47 |
0 |
| ODI |
0 |
0 |
40 |
84 |
130 |
114 |
90 |
0 |
| CDI |
0 |
0 |
21 |
84 |
151 |
201 |
371 |
49 |
| VCDI |
0 |
0 |
15 |
73 |
183 |
558 |
7176 |
8325 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12556 |
5397 |
799 |
341 |
227 |
113 |
14 |
0 |
| OW |
0 |
70 |
134 |
99 |
45 |
41 |
34 |
0 |
| VODI |
0 |
12 |
153 |
101 |
89 |
54 |
56 |
0 |
| ODI |
0 |
0 |
56 |
95 |
89 |
74 |
77 |
2 |
| CDI |
0 |
0 |
33 |
89 |
127 |
186 |
444 |
66 |
| VCDI |
0 |
0 |
56 |
131 |
289 |
619 |
7085 |
8306 |
|
Date: 2021-03-17:
| 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 |
12614 |
5618 |
771 |
254 |
143 |
66 |
4 |
0 |
| OW |
0 |
39 |
171 |
102 |
69 |
51 |
11 |
0 |
| VODI |
0 |
21 |
100 |
110 |
108 |
100 |
29 |
0 |
| ODI |
0 |
8 |
32 |
70 |
117 |
107 |
74 |
2 |
| CDI |
0 |
4 |
16 |
55 |
144 |
249 |
326 |
105 |
| VCDI |
0 |
4 |
29 |
42 |
102 |
851 |
6463 |
8978 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12614 |
5567 |
655 |
252 |
156 |
80 |
19 |
0 |
| OW |
0 |
72 |
164 |
66 |
62 |
62 |
14 |
0 |
| VODI |
0 |
25 |
156 |
82 |
75 |
89 |
33 |
0 |
| ODI |
0 |
15 |
55 |
77 |
91 |
90 |
91 |
9 |
| CDI |
0 |
4 |
43 |
78 |
112 |
208 |
275 |
66 |
| VCDI |
0 |
11 |
46 |
78 |
187 |
895 |
6475 |
9010 |
|
Date: 2021-03-19:
| 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 |
12577 |
5713 |
717 |
219 |
152 |
42 |
1 |
0 |
| OW |
0 |
77 |
173 |
87 |
87 |
58 |
7 |
0 |
| VODI |
0 |
19 |
139 |
99 |
129 |
107 |
27 |
0 |
| ODI |
0 |
4 |
69 |
80 |
101 |
141 |
92 |
0 |
| CDI |
0 |
0 |
32 |
68 |
146 |
358 |
587 |
10 |
| VCDI |
0 |
0 |
22 |
61 |
143 |
600 |
7871 |
7344 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12577 |
5649 |
641 |
213 |
147 |
50 |
7 |
0 |
| OW |
0 |
96 |
159 |
64 |
78 |
66 |
15 |
0 |
| VODI |
0 |
45 |
158 |
88 |
107 |
90 |
37 |
0 |
| ODI |
0 |
15 |
90 |
69 |
98 |
130 |
93 |
0 |
| CDI |
0 |
7 |
53 |
93 |
132 |
329 |
677 |
15 |
| VCDI |
0 |
1 |
51 |
87 |
196 |
641 |
7756 |
7339 |
|
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