Validation of sea ice concentration
Bulletin date: 2021-03-04
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2021-03-02:
| 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 |
12937 |
5841 |
917 |
359 |
80 |
13 |
0 |
0 |
| OW |
0 |
77 |
184 |
150 |
68 |
26 |
2 |
0 |
| VODI |
0 |
30 |
159 |
191 |
127 |
64 |
11 |
1 |
| ODI |
0 |
4 |
64 |
163 |
209 |
218 |
61 |
23 |
| CDI |
0 |
3 |
22 |
138 |
252 |
375 |
504 |
92 |
| VCDI |
0 |
0 |
59 |
265 |
350 |
705 |
8555 |
4860 |
|
...date precedes bulletin
|
Date: 2021-03-04:
| 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 |
12623 |
5796 |
820 |
356 |
162 |
73 |
5 |
0 |
| OW |
0 |
37 |
142 |
122 |
98 |
58 |
13 |
0 |
| VODI |
0 |
31 |
91 |
116 |
151 |
113 |
23 |
0 |
| ODI |
0 |
9 |
56 |
65 |
205 |
205 |
75 |
0 |
| CDI |
0 |
0 |
40 |
79 |
243 |
618 |
579 |
7 |
| VCDI |
0 |
0 |
27 |
135 |
341 |
1159 |
9430 |
4056 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12623 |
5805 |
838 |
357 |
174 |
74 |
8 |
0 |
| OW |
0 |
35 |
125 |
123 |
88 |
60 |
13 |
0 |
| VODI |
0 |
25 |
93 |
123 |
152 |
107 |
25 |
0 |
| ODI |
0 |
8 |
54 |
60 |
201 |
205 |
76 |
0 |
| CDI |
0 |
0 |
40 |
72 |
235 |
622 |
559 |
7 |
| VCDI |
0 |
0 |
26 |
138 |
350 |
1158 |
9444 |
4056 |
|
Date: 2021-03-08:
| 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 |
12149 |
5464 |
1091 |
538 |
271 |
92 |
68 |
0 |
| OW |
0 |
5 |
110 |
134 |
124 |
34 |
52 |
0 |
| VODI |
0 |
0 |
56 |
123 |
151 |
81 |
85 |
0 |
| ODI |
0 |
0 |
34 |
59 |
130 |
113 |
157 |
0 |
| CDI |
0 |
0 |
12 |
39 |
99 |
262 |
629 |
36 |
| VCDI |
0 |
0 |
16 |
44 |
163 |
511 |
7626 |
7601 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12149 |
5467 |
1045 |
486 |
262 |
96 |
76 |
0 |
| OW |
0 |
1 |
106 |
135 |
82 |
38 |
50 |
0 |
| VODI |
0 |
1 |
78 |
110 |
136 |
69 |
96 |
0 |
| ODI |
0 |
0 |
35 |
78 |
111 |
79 |
121 |
0 |
| CDI |
0 |
0 |
27 |
51 |
95 |
169 |
484 |
43 |
| VCDI |
0 |
0 |
28 |
77 |
252 |
642 |
7790 |
7594 |
|
Date: 2021-03-10:
| 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 |
12318 |
5470 |
1105 |
429 |
224 |
86 |
23 |
0 |
| OW |
0 |
4 |
124 |
102 |
80 |
64 |
21 |
0 |
| VODI |
0 |
4 |
70 |
107 |
110 |
111 |
60 |
0 |
| ODI |
0 |
3 |
22 |
59 |
92 |
117 |
106 |
3 |
| CDI |
0 |
0 |
14 |
61 |
66 |
185 |
365 |
38 |
| VCDI |
0 |
0 |
17 |
77 |
138 |
557 |
8065 |
7662 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12318 |
5469 |
1014 |
406 |
223 |
71 |
23 |
0 |
| OW |
0 |
5 |
147 |
74 |
72 |
60 |
27 |
0 |
| VODI |
0 |
4 |
103 |
103 |
84 |
107 |
50 |
0 |
| ODI |
0 |
3 |
45 |
81 |
79 |
97 |
85 |
2 |
| CDI |
0 |
0 |
24 |
67 |
98 |
213 |
403 |
27 |
| VCDI |
0 |
0 |
19 |
104 |
154 |
572 |
8052 |
7674 |
|
Date: 2021-03-12:
| 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 |
12802 |
5625 |
914 |
292 |
68 |
37 |
11 |
0 |
| OW |
0 |
51 |
146 |
126 |
32 |
30 |
22 |
0 |
| VODI |
0 |
24 |
91 |
183 |
82 |
51 |
31 |
0 |
| ODI |
0 |
5 |
47 |
120 |
60 |
80 |
97 |
30 |
| CDI |
0 |
0 |
35 |
109 |
105 |
139 |
342 |
86 |
| VCDI |
0 |
0 |
6 |
189 |
271 |
486 |
7225 |
8109 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12802 |
5462 |
814 |
282 |
71 |
52 |
30 |
0 |
| OW |
0 |
66 |
122 |
94 |
37 |
32 |
29 |
0 |
| VODI |
0 |
55 |
92 |
137 |
55 |
54 |
55 |
0 |
| ODI |
0 |
28 |
70 |
113 |
44 |
57 |
99 |
2 |
| CDI |
0 |
31 |
66 |
149 |
127 |
185 |
463 |
52 |
| VCDI |
0 |
63 |
75 |
244 |
284 |
443 |
7052 |
8171 |
|
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