Validation of sea ice concentration
Bulletin date: 2021-11-25
Model vs. observations, sea ice class contingency tables
Date: 2021-11-19:
| 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 |
16288 |
7622 |
743 |
441 |
242 |
132 |
45 |
0 |
| OW |
0 |
104 |
109 |
109 |
98 |
98 |
49 |
0 |
| VODI |
0 |
75 |
74 |
101 |
77 |
146 |
104 |
0 |
| ODI |
0 |
23 |
48 |
59 |
98 |
135 |
190 |
0 |
| CDI |
0 |
28 |
24 |
66 |
106 |
182 |
307 |
37 |
| VCDI |
0 |
17 |
46 |
76 |
127 |
470 |
5047 |
4416 |
|
...date precedes bulletin
|
Date: 2021-11-23:
| 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 |
15337 |
7819 |
883 |
442 |
164 |
104 |
65 |
0 |
| OW |
0 |
58 |
118 |
144 |
100 |
67 |
18 |
0 |
| VODI |
0 |
26 |
75 |
143 |
114 |
127 |
57 |
0 |
| ODI |
0 |
15 |
23 |
85 |
96 |
149 |
153 |
0 |
| CDI |
0 |
13 |
13 |
65 |
101 |
169 |
332 |
18 |
| VCDI |
0 |
23 |
42 |
84 |
163 |
526 |
6320 |
3908 |
|
...date precedes bulletin
|
Date: 2021-11-25:
| 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 |
15001 |
7310 |
1080 |
433 |
232 |
168 |
112 |
0 |
| OW |
0 |
44 |
142 |
120 |
83 |
131 |
21 |
0 |
| VODI |
0 |
14 |
80 |
77 |
100 |
183 |
63 |
0 |
| ODI |
0 |
2 |
37 |
39 |
75 |
171 |
160 |
6 |
| CDI |
0 |
0 |
10 |
43 |
53 |
151 |
319 |
49 |
| VCDI |
0 |
0 |
14 |
16 |
58 |
347 |
6141 |
5074 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15001 |
7305 |
1073 |
454 |
248 |
186 |
109 |
0 |
| OW |
0 |
47 |
153 |
96 |
65 |
119 |
20 |
0 |
| VODI |
0 |
16 |
79 |
78 |
96 |
171 |
59 |
0 |
| ODI |
0 |
2 |
34 |
42 |
81 |
163 |
147 |
6 |
| CDI |
0 |
0 |
11 |
42 |
53 |
159 |
344 |
49 |
| VCDI |
0 |
0 |
13 |
16 |
58 |
353 |
6137 |
5074 |
|
Date: 2021-11-29:
| 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 |
14516 |
6949 |
1294 |
362 |
305 |
222 |
126 |
0 |
| OW |
0 |
23 |
144 |
97 |
83 |
84 |
56 |
0 |
| VODI |
0 |
2 |
73 |
108 |
118 |
130 |
127 |
0 |
| ODI |
0 |
0 |
21 |
42 |
83 |
117 |
204 |
0 |
| CDI |
0 |
0 |
6 |
15 |
56 |
97 |
479 |
29 |
| VCDI |
0 |
0 |
8 |
34 |
83 |
267 |
5958 |
5841 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14516 |
6881 |
1184 |
359 |
334 |
281 |
193 |
0 |
| OW |
0 |
87 |
167 |
71 |
67 |
95 |
94 |
0 |
| VODI |
0 |
6 |
114 |
92 |
73 |
102 |
157 |
0 |
| ODI |
0 |
0 |
48 |
53 |
77 |
60 |
204 |
0 |
| CDI |
0 |
0 |
18 |
38 |
57 |
61 |
360 |
17 |
| VCDI |
0 |
0 |
15 |
45 |
120 |
318 |
5942 |
5853 |
|
Date: 2021-12-01:
| 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 |
14473 |
6550 |
1404 |
437 |
274 |
160 |
130 |
0 |
| OW |
0 |
32 |
173 |
160 |
87 |
50 |
29 |
0 |
| VODI |
0 |
24 |
104 |
131 |
128 |
112 |
61 |
0 |
| ODI |
0 |
1 |
60 |
70 |
87 |
86 |
148 |
0 |
| CDI |
0 |
0 |
37 |
43 |
98 |
128 |
344 |
59 |
| VCDI |
0 |
0 |
7 |
21 |
28 |
129 |
5545 |
6749 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14473 |
6517 |
1371 |
466 |
328 |
215 |
161 |
0 |
| OW |
0 |
63 |
163 |
130 |
93 |
61 |
56 |
0 |
| VODI |
0 |
26 |
112 |
118 |
86 |
104 |
147 |
0 |
| ODI |
0 |
1 |
63 |
69 |
64 |
61 |
205 |
0 |
| CDI |
0 |
0 |
48 |
43 |
71 |
78 |
374 |
50 |
| VCDI |
0 |
0 |
28 |
36 |
60 |
146 |
5314 |
6758 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14414 |
6423 |
1248 |
467 |
258 |
181 |
238 |
0 |
| OW |
0 |
45 |
189 |
88 |
90 |
96 |
69 |
0 |
| VODI |
0 |
38 |
143 |
77 |
81 |
110 |
168 |
0 |
| ODI |
0 |
9 |
86 |
57 |
73 |
77 |
193 |
0 |
| CDI |
0 |
4 |
56 |
64 |
90 |
87 |
381 |
64 |
| VCDI |
0 |
4 |
19 |
55 |
77 |
194 |
5787 |
6359 |
|
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