Validation of sea ice concentration
Bulletin date: 2021-02-25
Model vs. observations, sea ice class contingency tables
Date: 2021-02-19:
| 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 |
13159 |
5693 |
638 |
282 |
188 |
91 |
29 |
0 |
| OW |
0 |
74 |
154 |
68 |
76 |
47 |
23 |
0 |
| VODI |
0 |
43 |
126 |
88 |
89 |
95 |
48 |
1 |
| ODI |
0 |
13 |
77 |
70 |
70 |
98 |
84 |
11 |
| CDI |
0 |
8 |
75 |
100 |
126 |
188 |
413 |
94 |
| VCDI |
0 |
28 |
96 |
78 |
181 |
467 |
7334 |
7536 |
|
...date precedes bulletin
|
Date: 2021-02-23:
| 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 |
13879 |
5623 |
377 |
234 |
108 |
107 |
28 |
0 |
| OW |
1 |
254 |
94 |
80 |
27 |
52 |
17 |
0 |
| VODI |
0 |
149 |
122 |
106 |
44 |
61 |
56 |
2 |
| ODI |
0 |
66 |
104 |
95 |
66 |
67 |
153 |
5 |
| CDI |
0 |
42 |
119 |
120 |
114 |
181 |
555 |
14 |
| VCDI |
0 |
119 |
95 |
194 |
161 |
511 |
8019 |
5938 |
|
...date precedes bulletin
|
Date: 2021-02-25:
| 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 |
14186 |
5527 |
399 |
123 |
42 |
11 |
3 |
0 |
| OW |
1 |
286 |
161 |
81 |
41 |
1 |
4 |
0 |
| VODI |
0 |
166 |
208 |
112 |
79 |
26 |
10 |
3 |
| ODI |
0 |
62 |
151 |
133 |
107 |
37 |
52 |
10 |
| CDI |
0 |
30 |
104 |
160 |
245 |
146 |
509 |
66 |
| VCDI |
0 |
64 |
148 |
268 |
340 |
628 |
7897 |
5532 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14186 |
5554 |
409 |
138 |
46 |
11 |
3 |
0 |
| OW |
1 |
276 |
149 |
74 |
41 |
2 |
4 |
0 |
| VODI |
0 |
168 |
222 |
109 |
79 |
24 |
9 |
4 |
| ODI |
0 |
54 |
149 |
137 |
99 |
42 |
53 |
12 |
| CDI |
0 |
27 |
98 |
141 |
250 |
140 |
486 |
75 |
| VCDI |
0 |
56 |
144 |
278 |
339 |
630 |
7920 |
5520 |
|
Date: 2021-03-01:
| 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 |
13181 |
5742 |
854 |
316 |
86 |
39 |
3 |
0 |
| OW |
0 |
99 |
203 |
126 |
61 |
53 |
6 |
0 |
| VODI |
0 |
32 |
129 |
188 |
135 |
137 |
25 |
2 |
| ODI |
0 |
6 |
66 |
122 |
167 |
300 |
107 |
16 |
| CDI |
0 |
1 |
22 |
81 |
137 |
463 |
522 |
85 |
| VCDI |
0 |
0 |
53 |
157 |
183 |
668 |
8314 |
5272 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13181 |
5702 |
792 |
310 |
103 |
49 |
3 |
0 |
| OW |
0 |
106 |
185 |
114 |
36 |
54 |
7 |
0 |
| VODI |
0 |
44 |
157 |
153 |
96 |
119 |
29 |
4 |
| ODI |
0 |
19 |
78 |
131 |
128 |
206 |
86 |
11 |
| CDI |
0 |
7 |
41 |
86 |
169 |
374 |
500 |
83 |
| VCDI |
0 |
2 |
74 |
196 |
237 |
858 |
8352 |
5277 |
|
Date: 2021-03-03:
| 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 |
12739 |
5771 |
936 |
372 |
160 |
40 |
2 |
0 |
| OW |
0 |
35 |
128 |
154 |
98 |
45 |
5 |
0 |
| VODI |
0 |
14 |
94 |
166 |
178 |
76 |
20 |
1 |
| ODI |
0 |
0 |
51 |
74 |
249 |
211 |
68 |
10 |
| CDI |
0 |
0 |
22 |
75 |
280 |
515 |
564 |
46 |
| VCDI |
0 |
0 |
32 |
224 |
432 |
835 |
8797 |
4640 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12739 |
5749 |
860 |
353 |
168 |
46 |
3 |
0 |
| OW |
0 |
37 |
156 |
137 |
78 |
53 |
6 |
0 |
| VODI |
0 |
20 |
88 |
131 |
154 |
92 |
28 |
1 |
| ODI |
0 |
6 |
44 |
86 |
177 |
176 |
79 |
19 |
| CDI |
0 |
4 |
33 |
73 |
291 |
414 |
513 |
60 |
| VCDI |
0 |
4 |
82 |
285 |
529 |
941 |
8827 |
4617 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12302 |
5633 |
971 |
435 |
263 |
89 |
8 |
0 |
| OW |
0 |
8 |
93 |
129 |
156 |
97 |
13 |
0 |
| VODI |
0 |
0 |
57 |
104 |
163 |
155 |
40 |
0 |
| ODI |
0 |
4 |
13 |
66 |
146 |
184 |
133 |
1 |
| CDI |
0 |
2 |
17 |
82 |
210 |
408 |
669 |
12 |
| VCDI |
0 |
1 |
61 |
165 |
406 |
1028 |
9510 |
4325 |
|
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