Validation of sea ice concentration
Bulletin date: 2021-04-29
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2021-04-27:
| 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 |
12998 |
5999 |
1549 |
547 |
438 |
232 |
57 |
0 |
| OW |
0 |
0 |
135 |
178 |
210 |
129 |
38 |
0 |
| VODI |
0 |
0 |
92 |
146 |
235 |
175 |
106 |
0 |
| ODI |
0 |
0 |
20 |
125 |
193 |
246 |
215 |
0 |
| CDI |
0 |
0 |
9 |
79 |
198 |
550 |
1314 |
22 |
| VCDI |
0 |
0 |
13 |
55 |
107 |
430 |
6484 |
4835 |
|
...date precedes bulletin
|
Date: 2021-04-29:
| 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 |
12773 |
6115 |
1306 |
869 |
353 |
230 |
91 |
0 |
| OW |
0 |
2 |
103 |
268 |
165 |
124 |
53 |
0 |
| VODI |
0 |
0 |
66 |
187 |
186 |
144 |
119 |
0 |
| ODI |
0 |
0 |
8 |
147 |
150 |
200 |
224 |
0 |
| CDI |
0 |
0 |
5 |
107 |
189 |
460 |
1430 |
12 |
| VCDI |
0 |
0 |
13 |
94 |
89 |
470 |
6440 |
4967 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12773 |
6117 |
1328 |
916 |
405 |
271 |
112 |
0 |
| OW |
0 |
0 |
78 |
232 |
119 |
98 |
42 |
0 |
| VODI |
0 |
0 |
70 |
179 |
189 |
152 |
133 |
0 |
| ODI |
0 |
0 |
8 |
130 |
133 |
195 |
214 |
0 |
| CDI |
0 |
0 |
6 |
121 |
178 |
458 |
1391 |
10 |
| VCDI |
0 |
0 |
11 |
94 |
108 |
454 |
6465 |
4969 |
|
Date: 2021-05-03:
| 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 |
12832 |
6195 |
1394 |
710 |
375 |
228 |
33 |
0 |
| OW |
0 |
9 |
134 |
211 |
186 |
108 |
20 |
0 |
| VODI |
0 |
0 |
61 |
234 |
282 |
221 |
94 |
0 |
| ODI |
0 |
2 |
19 |
87 |
163 |
235 |
263 |
3 |
| CDI |
0 |
7 |
6 |
79 |
144 |
409 |
1465 |
15 |
| VCDI |
0 |
0 |
1 |
42 |
95 |
444 |
6662 |
4691 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12832 |
6194 |
1410 |
728 |
455 |
309 |
49 |
0 |
| OW |
0 |
10 |
98 |
186 |
144 |
87 |
36 |
0 |
| VODI |
0 |
0 |
68 |
186 |
218 |
200 |
112 |
0 |
| ODI |
0 |
3 |
22 |
97 |
120 |
157 |
279 |
3 |
| CDI |
0 |
6 |
14 |
92 |
165 |
359 |
1255 |
10 |
| VCDI |
0 |
0 |
3 |
74 |
143 |
533 |
6806 |
4696 |
|
Date: 2021-05-05:
| 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 |
12687 |
6357 |
1401 |
804 |
440 |
157 |
79 |
0 |
| OW |
0 |
4 |
91 |
206 |
187 |
108 |
57 |
0 |
| VODI |
0 |
0 |
51 |
219 |
255 |
123 |
135 |
0 |
| ODI |
0 |
6 |
25 |
98 |
111 |
132 |
354 |
5 |
| CDI |
0 |
5 |
18 |
101 |
195 |
315 |
1499 |
14 |
| VCDI |
0 |
0 |
12 |
52 |
92 |
232 |
6288 |
5244 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12687 |
6355 |
1392 |
776 |
464 |
207 |
115 |
0 |
| OW |
0 |
6 |
77 |
197 |
162 |
80 |
61 |
0 |
| VODI |
0 |
0 |
52 |
197 |
207 |
109 |
201 |
0 |
| ODI |
0 |
7 |
25 |
85 |
120 |
94 |
379 |
6 |
| CDI |
0 |
4 |
21 |
142 |
197 |
291 |
1213 |
9 |
| VCDI |
0 |
0 |
31 |
83 |
130 |
286 |
6443 |
5248 |
|
Date: 2021-05-07:
| 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 |
12807 |
6362 |
1307 |
796 |
384 |
152 |
74 |
0 |
| OW |
0 |
19 |
177 |
250 |
203 |
116 |
66 |
0 |
| VODI |
0 |
0 |
80 |
180 |
132 |
165 |
151 |
2 |
| ODI |
0 |
12 |
25 |
110 |
127 |
136 |
351 |
7 |
| CDI |
0 |
1 |
6 |
88 |
158 |
339 |
1396 |
22 |
| VCDI |
0 |
0 |
2 |
64 |
82 |
210 |
6359 |
5241 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12807 |
6350 |
1293 |
794 |
451 |
201 |
112 |
0 |
| OW |
0 |
28 |
129 |
183 |
113 |
101 |
68 |
0 |
| VODI |
0 |
4 |
102 |
188 |
119 |
125 |
204 |
2 |
| ODI |
0 |
12 |
43 |
107 |
97 |
115 |
298 |
6 |
| CDI |
0 |
0 |
27 |
106 |
201 |
333 |
1237 |
16 |
| VCDI |
0 |
0 |
3 |
110 |
105 |
243 |
6478 |
5248 |
|
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