Validation of sea ice concentration
Bulletin date: 2021-04-15
Model vs. observations, sea ice class contingency tables
Date: 2021-04-09:
| 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 |
12652 |
6027 |
1033 |
504 |
283 |
59 |
26 |
0 |
| OW |
0 |
136 |
271 |
163 |
113 |
62 |
36 |
0 |
| VODI |
0 |
26 |
246 |
319 |
138 |
109 |
114 |
0 |
| ODI |
0 |
2 |
127 |
228 |
146 |
158 |
251 |
1 |
| CDI |
0 |
1 |
77 |
190 |
156 |
260 |
710 |
13 |
| VCDI |
0 |
2 |
167 |
373 |
610 |
626 |
7549 |
4195 |
|
...date precedes bulletin
|
Date: 2021-04-13:
| 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 |
12731 |
6295 |
1490 |
572 |
194 |
107 |
35 |
0 |
| OW |
0 |
10 |
254 |
202 |
134 |
88 |
50 |
0 |
| VODI |
0 |
2 |
440 |
238 |
155 |
146 |
109 |
0 |
| ODI |
0 |
0 |
183 |
193 |
200 |
170 |
206 |
0 |
| CDI |
0 |
0 |
79 |
181 |
217 |
230 |
1232 |
14 |
| VCDI |
0 |
0 |
142 |
341 |
279 |
449 |
6746 |
4045 |
|
...date precedes bulletin
|
Date: 2021-04-15:
| 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 |
12901 |
5901 |
1264 |
608 |
425 |
68 |
44 |
0 |
| OW |
0 |
6 |
210 |
181 |
179 |
89 |
30 |
0 |
| VODI |
0 |
0 |
150 |
194 |
241 |
225 |
68 |
0 |
| ODI |
0 |
0 |
86 |
266 |
230 |
205 |
156 |
0 |
| CDI |
0 |
0 |
54 |
169 |
177 |
197 |
830 |
1 |
| VCDI |
0 |
0 |
44 |
137 |
319 |
1093 |
7376 |
4035 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12901 |
5899 |
1289 |
641 |
459 |
78 |
64 |
0 |
| OW |
0 |
8 |
188 |
149 |
163 |
94 |
27 |
0 |
| VODI |
0 |
0 |
137 |
174 |
234 |
204 |
55 |
0 |
| ODI |
0 |
0 |
93 |
274 |
211 |
204 |
142 |
0 |
| CDI |
0 |
0 |
53 |
184 |
171 |
196 |
732 |
1 |
| VCDI |
0 |
0 |
48 |
133 |
333 |
1101 |
7484 |
4035 |
|
Date: 2021-04-19:
| 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 |
13397 |
6092 |
1325 |
612 |
263 |
51 |
39 |
0 |
| OW |
0 |
18 |
145 |
238 |
201 |
73 |
56 |
0 |
| VODI |
0 |
2 |
111 |
159 |
246 |
112 |
80 |
0 |
| ODI |
0 |
0 |
48 |
120 |
163 |
170 |
195 |
1 |
| CDI |
0 |
0 |
19 |
103 |
165 |
227 |
750 |
28 |
| VCDI |
0 |
0 |
16 |
109 |
176 |
532 |
6531 |
5586 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13397 |
6027 |
1151 |
577 |
277 |
71 |
99 |
0 |
| OW |
0 |
51 |
208 |
152 |
112 |
49 |
40 |
0 |
| VODI |
0 |
25 |
122 |
176 |
162 |
81 |
74 |
0 |
| ODI |
0 |
8 |
66 |
116 |
147 |
78 |
113 |
0 |
| CDI |
0 |
1 |
64 |
113 |
222 |
219 |
641 |
28 |
| VCDI |
0 |
0 |
53 |
207 |
294 |
667 |
6684 |
5587 |
|
Date: 2021-04-21:
| 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 |
13468 |
6132 |
1481 |
688 |
264 |
61 |
46 |
0 |
| OW |
0 |
12 |
131 |
243 |
150 |
56 |
56 |
0 |
| VODI |
0 |
2 |
79 |
206 |
178 |
104 |
78 |
0 |
| ODI |
0 |
0 |
32 |
116 |
133 |
154 |
161 |
26 |
| CDI |
0 |
0 |
20 |
104 |
193 |
196 |
856 |
79 |
| VCDI |
0 |
0 |
5 |
104 |
256 |
360 |
6752 |
5177 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13468 |
6057 |
1355 |
534 |
212 |
77 |
80 |
0 |
| OW |
0 |
54 |
166 |
174 |
95 |
31 |
48 |
0 |
| VODI |
0 |
29 |
106 |
255 |
144 |
64 |
79 |
1 |
| ODI |
0 |
6 |
61 |
180 |
130 |
100 |
123 |
34 |
| CDI |
0 |
0 |
48 |
141 |
251 |
218 |
790 |
83 |
| VCDI |
0 |
0 |
12 |
177 |
342 |
441 |
6829 |
5164 |
|
Date: 2021-04-23:
| 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 |
13374 |
6125 |
1468 |
577 |
322 |
98 |
78 |
0 |
| OW |
0 |
15 |
246 |
246 |
136 |
61 |
54 |
0 |
| VODI |
0 |
0 |
144 |
176 |
208 |
118 |
97 |
0 |
| ODI |
0 |
0 |
51 |
107 |
136 |
145 |
158 |
0 |
| CDI |
0 |
0 |
15 |
91 |
205 |
245 |
1140 |
4 |
| VCDI |
0 |
0 |
10 |
85 |
183 |
347 |
6863 |
4831 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13374 |
6070 |
1316 |
498 |
270 |
115 |
120 |
0 |
| OW |
0 |
46 |
230 |
184 |
90 |
53 |
51 |
0 |
| VODI |
0 |
19 |
187 |
204 |
124 |
54 |
85 |
0 |
| ODI |
0 |
5 |
115 |
141 |
170 |
100 |
183 |
1 |
| CDI |
0 |
0 |
61 |
132 |
293 |
297 |
1162 |
8 |
| VCDI |
0 |
0 |
25 |
123 |
243 |
395 |
6789 |
4826 |
|
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