Validation of sea ice concentration
Bulletin date: 2021-05-06
Model vs. observations, sea ice class contingency tables
Date: 2021-04-30:
| 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 |
12741 |
6336 |
1167 |
801 |
301 |
220 |
126 |
0 |
| OW |
0 |
11 |
113 |
288 |
171 |
104 |
71 |
0 |
| VODI |
0 |
0 |
60 |
236 |
146 |
118 |
137 |
0 |
| ODI |
0 |
0 |
16 |
137 |
136 |
161 |
259 |
1 |
| CDI |
0 |
3 |
5 |
109 |
196 |
361 |
1519 |
11 |
| VCDI |
0 |
3 |
7 |
70 |
107 |
522 |
6724 |
4665 |
|
...date precedes bulletin
|
Date: 2021-05-04:
| 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 |
12811 |
6376 |
1344 |
959 |
244 |
133 |
60 |
0 |
| OW |
0 |
11 |
108 |
257 |
131 |
75 |
37 |
0 |
| VODI |
0 |
1 |
58 |
312 |
210 |
117 |
110 |
0 |
| ODI |
0 |
3 |
22 |
129 |
111 |
166 |
303 |
5 |
| CDI |
0 |
6 |
18 |
109 |
164 |
323 |
1490 |
15 |
| VCDI |
0 |
0 |
7 |
53 |
125 |
341 |
6562 |
4853 |
|
...date precedes bulletin
|
Date: 2021-05-06:
| 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 |
12804 |
6426 |
1129 |
850 |
401 |
197 |
86 |
0 |
| OW |
0 |
15 |
116 |
200 |
187 |
152 |
69 |
0 |
| VODI |
0 |
0 |
68 |
187 |
164 |
197 |
146 |
1 |
| ODI |
0 |
7 |
19 |
110 |
115 |
169 |
336 |
7 |
| CDI |
0 |
4 |
13 |
70 |
163 |
387 |
1420 |
16 |
| VCDI |
0 |
0 |
3 |
39 |
86 |
336 |
6352 |
5112 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12804 |
6425 |
1153 |
863 |
434 |
228 |
107 |
0 |
| OW |
0 |
15 |
85 |
148 |
131 |
114 |
48 |
0 |
| VODI |
0 |
2 |
71 |
208 |
172 |
187 |
148 |
1 |
| ODI |
0 |
8 |
23 |
128 |
126 |
174 |
307 |
6 |
| CDI |
0 |
2 |
10 |
69 |
166 |
406 |
1388 |
13 |
| VCDI |
0 |
0 |
6 |
40 |
87 |
329 |
6411 |
5116 |
|
Date: 2021-05-10:
| 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 |
13062 |
6020 |
1473 |
1340 |
303 |
54 |
104 |
0 |
| OW |
1 |
4 |
66 |
264 |
151 |
37 |
56 |
0 |
| VODI |
7 |
1 |
37 |
290 |
178 |
134 |
168 |
25 |
| ODI |
5 |
3 |
10 |
120 |
209 |
205 |
220 |
59 |
| CDI |
0 |
1 |
3 |
81 |
181 |
503 |
1402 |
81 |
| VCDI |
0 |
0 |
1 |
30 |
104 |
316 |
6050 |
4800 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13062 |
6007 |
1447 |
1215 |
335 |
72 |
127 |
0 |
| OW |
2 |
17 |
83 |
280 |
114 |
64 |
69 |
1 |
| VODI |
11 |
2 |
36 |
280 |
143 |
117 |
137 |
11 |
| ODI |
0 |
3 |
14 |
167 |
162 |
163 |
268 |
63 |
| CDI |
0 |
0 |
7 |
135 |
226 |
387 |
1111 |
72 |
| VCDI |
0 |
0 |
3 |
48 |
146 |
446 |
6288 |
4818 |
|
Date: 2021-05-12:
| 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 |
13488 |
5979 |
1654 |
898 |
271 |
100 |
78 |
0 |
| OW |
2 |
2 |
132 |
264 |
94 |
73 |
72 |
0 |
| VODI |
11 |
2 |
53 |
245 |
195 |
143 |
155 |
4 |
| ODI |
0 |
2 |
12 |
184 |
169 |
180 |
330 |
11 |
| CDI |
0 |
0 |
5 |
153 |
233 |
492 |
1502 |
13 |
| VCDI |
0 |
0 |
3 |
77 |
106 |
251 |
6162 |
4359 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13488 |
5971 |
1608 |
856 |
308 |
137 |
103 |
0 |
| OW |
5 |
10 |
117 |
211 |
93 |
70 |
90 |
0 |
| VODI |
8 |
2 |
87 |
251 |
132 |
138 |
197 |
7 |
| ODI |
0 |
2 |
29 |
194 |
183 |
221 |
356 |
10 |
| CDI |
0 |
0 |
12 |
177 |
217 |
363 |
1380 |
11 |
| VCDI |
0 |
0 |
6 |
132 |
135 |
310 |
6173 |
4359 |
|
Date: 2021-05-14:
| 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 |
13627 |
6240 |
1065 |
1006 |
261 |
144 |
59 |
0 |
| OW |
8 |
6 |
57 |
242 |
137 |
98 |
76 |
0 |
| VODI |
5 |
2 |
27 |
298 |
197 |
206 |
118 |
5 |
| ODI |
0 |
2 |
19 |
163 |
181 |
247 |
301 |
5 |
| CDI |
0 |
0 |
12 |
155 |
385 |
676 |
1247 |
6 |
| VCDI |
0 |
0 |
1 |
81 |
153 |
825 |
5637 |
4179 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13637 |
6238 |
1012 |
943 |
299 |
181 |
92 |
0 |
| OW |
3 |
8 |
79 |
225 |
108 |
121 |
67 |
1 |
| VODI |
0 |
4 |
48 |
259 |
147 |
215 |
161 |
8 |
| ODI |
0 |
0 |
20 |
210 |
205 |
265 |
343 |
7 |
| CDI |
0 |
0 |
18 |
160 |
391 |
649 |
1365 |
0 |
| VCDI |
0 |
0 |
4 |
148 |
164 |
765 |
5410 |
4179 |
|
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