Validation of sea ice concentration
Bulletin date: 2021-02-18
Model vs. observations, sea ice class contingency tables
Date: 2021-02-12:
| 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 |
12131 |
5835 |
837 |
365 |
255 |
189 |
142 |
0 |
| OW |
0 |
15 |
87 |
100 |
69 |
83 |
88 |
0 |
| VODI |
0 |
1 |
65 |
103 |
75 |
125 |
132 |
0 |
| ODI |
0 |
0 |
31 |
59 |
67 |
100 |
151 |
0 |
| CDI |
0 |
0 |
13 |
54 |
76 |
177 |
412 |
3 |
| VCDI |
0 |
0 |
9 |
49 |
54 |
327 |
9049 |
6831 |
|
...date precedes bulletin
|
Date: 2021-02-16:
| 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 |
12954 |
5738 |
679 |
405 |
138 |
85 |
58 |
0 |
| OW |
0 |
39 |
97 |
113 |
75 |
41 |
42 |
0 |
| VODI |
0 |
19 |
65 |
124 |
96 |
90 |
75 |
0 |
| ODI |
0 |
2 |
39 |
75 |
79 |
83 |
155 |
0 |
| CDI |
0 |
0 |
27 |
90 |
131 |
233 |
506 |
19 |
| VCDI |
0 |
0 |
10 |
28 |
116 |
446 |
8634 |
6553 |
|
...date precedes bulletin
|
Date: 2021-02-18:
| 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 |
12988 |
5737 |
770 |
299 |
155 |
92 |
28 |
0 |
| OW |
0 |
53 |
147 |
99 |
59 |
68 |
16 |
0 |
| VODI |
0 |
19 |
129 |
102 |
90 |
95 |
43 |
1 |
| ODI |
0 |
3 |
79 |
67 |
81 |
103 |
88 |
4 |
| CDI |
0 |
6 |
67 |
72 |
127 |
270 |
404 |
44 |
| VCDI |
0 |
17 |
74 |
88 |
146 |
534 |
7693 |
7202 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12988 |
5738 |
773 |
298 |
164 |
101 |
29 |
0 |
| OW |
0 |
58 |
132 |
106 |
50 |
58 |
17 |
0 |
| VODI |
0 |
15 |
137 |
101 |
92 |
98 |
47 |
2 |
| ODI |
0 |
2 |
85 |
61 |
85 |
91 |
89 |
2 |
| CDI |
0 |
6 |
74 |
74 |
116 |
265 |
362 |
48 |
| VCDI |
0 |
16 |
65 |
87 |
151 |
549 |
7728 |
7199 |
|
Date: 2021-02-22:
| 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 |
13535 |
5697 |
412 |
282 |
164 |
170 |
39 |
0 |
| OW |
0 |
156 |
139 |
68 |
54 |
53 |
29 |
0 |
| VODI |
0 |
92 |
150 |
95 |
66 |
84 |
54 |
0 |
| ODI |
0 |
32 |
87 |
87 |
48 |
101 |
188 |
0 |
| CDI |
0 |
34 |
75 |
147 |
153 |
320 |
461 |
0 |
| VCDI |
0 |
96 |
91 |
173 |
272 |
745 |
8901 |
4809 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13535 |
5620 |
453 |
272 |
169 |
145 |
42 |
0 |
| OW |
0 |
155 |
139 |
66 |
38 |
51 |
34 |
0 |
| VODI |
0 |
112 |
116 |
101 |
65 |
82 |
61 |
0 |
| ODI |
0 |
54 |
88 |
106 |
54 |
91 |
135 |
0 |
| CDI |
0 |
54 |
69 |
141 |
131 |
225 |
421 |
1 |
| VCDI |
0 |
112 |
89 |
166 |
300 |
879 |
8979 |
4808 |
|
Date: 2021-02-24:
| 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 |
14230 |
5393 |
476 |
184 |
81 |
31 |
6 |
0 |
| OW |
2 |
239 |
153 |
61 |
60 |
16 |
5 |
0 |
| VODI |
0 |
144 |
176 |
105 |
83 |
31 |
15 |
2 |
| ODI |
0 |
34 |
155 |
90 |
125 |
46 |
77 |
6 |
| CDI |
0 |
10 |
130 |
152 |
179 |
162 |
516 |
27 |
| VCDI |
0 |
19 |
112 |
239 |
291 |
774 |
7886 |
5636 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14230 |
5340 |
436 |
175 |
74 |
38 |
15 |
0 |
| OW |
2 |
311 |
173 |
69 |
44 |
14 |
6 |
0 |
| VODI |
0 |
124 |
227 |
124 |
91 |
29 |
21 |
2 |
| ODI |
0 |
37 |
147 |
107 |
116 |
60 |
66 |
7 |
| CDI |
0 |
11 |
121 |
152 |
220 |
190 |
553 |
32 |
| VCDI |
0 |
16 |
98 |
204 |
274 |
729 |
7844 |
5630 |
|
Date: 2021-02-26:
| 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 |
13841 |
5630 |
422 |
192 |
79 |
10 |
2 |
0 |
| OW |
1 |
211 |
166 |
88 |
79 |
13 |
4 |
0 |
| VODI |
0 |
151 |
191 |
125 |
142 |
24 |
14 |
3 |
| ODI |
0 |
35 |
123 |
128 |
168 |
95 |
54 |
8 |
| CDI |
0 |
28 |
62 |
113 |
267 |
277 |
545 |
25 |
| VCDI |
0 |
56 |
120 |
241 |
343 |
724 |
8548 |
4811 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13840 |
5644 |
377 |
184 |
100 |
14 |
7 |
0 |
| OW |
1 |
251 |
218 |
111 |
81 |
7 |
6 |
0 |
| VODI |
1 |
93 |
212 |
129 |
189 |
49 |
18 |
4 |
| ODI |
0 |
55 |
109 |
115 |
144 |
107 |
86 |
9 |
| CDI |
0 |
38 |
49 |
133 |
225 |
288 |
457 |
13 |
| VCDI |
0 |
30 |
119 |
215 |
339 |
678 |
8593 |
4821 |
|
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