Validation of sea ice concentration
Bulletin date: 2021-06-17
Model vs. observations, sea ice class contingency tables
Date: 2021-06-11:
| 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 |
15047 |
5547 |
2204 |
1477 |
723 |
180 |
215 |
11 |
| OW |
0 |
1 |
53 |
223 |
327 |
157 |
179 |
1 |
| VODI |
0 |
0 |
39 |
114 |
301 |
309 |
401 |
16 |
| ODI |
0 |
0 |
19 |
47 |
142 |
370 |
947 |
23 |
| CDI |
0 |
0 |
19 |
65 |
156 |
392 |
1776 |
22 |
| VCDI |
0 |
0 |
0 |
13 |
29 |
41 |
2499 |
4074 |
|
...date precedes bulletin
|
Date: 2021-06-15:
| 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 |
15899 |
5878 |
1898 |
1230 |
725 |
153 |
205 |
11 |
| OW |
0 |
0 |
58 |
198 |
286 |
165 |
128 |
0 |
| VODI |
0 |
0 |
23 |
117 |
301 |
374 |
245 |
2 |
| ODI |
0 |
0 |
15 |
48 |
191 |
499 |
641 |
1 |
| CDI |
0 |
0 |
0 |
43 |
213 |
405 |
1236 |
0 |
| VCDI |
0 |
0 |
0 |
44 |
60 |
246 |
3242 |
3379 |
|
...date precedes bulletin
|
Date: 2021-06-17:
| 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 |
15938 |
5977 |
1997 |
1186 |
771 |
221 |
255 |
11 |
| OW |
0 |
0 |
61 |
241 |
243 |
178 |
124 |
0 |
| VODI |
0 |
0 |
42 |
145 |
274 |
294 |
312 |
2 |
| ODI |
0 |
0 |
3 |
57 |
149 |
352 |
583 |
1 |
| CDI |
0 |
0 |
1 |
76 |
195 |
448 |
1328 |
0 |
| VCDI |
0 |
0 |
1 |
54 |
88 |
103 |
3139 |
3309 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15938 |
5977 |
1999 |
1253 |
823 |
285 |
276 |
11 |
| OW |
0 |
0 |
62 |
172 |
216 |
142 |
123 |
0 |
| VODI |
0 |
0 |
38 |
147 |
256 |
290 |
342 |
2 |
| ODI |
0 |
0 |
4 |
57 |
143 |
322 |
530 |
1 |
| CDI |
0 |
0 |
1 |
74 |
193 |
456 |
1206 |
0 |
| VCDI |
0 |
0 |
1 |
56 |
89 |
101 |
3264 |
3309 |
|
Date: 2021-06-21:
| 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 |
15617 |
6370 |
2499 |
1507 |
509 |
292 |
165 |
11 |
| OW |
0 |
0 |
100 |
181 |
215 |
126 |
73 |
0 |
| VODI |
0 |
0 |
39 |
102 |
216 |
330 |
210 |
2 |
| ODI |
0 |
0 |
6 |
74 |
179 |
411 |
658 |
1 |
| CDI |
0 |
0 |
0 |
80 |
248 |
270 |
2003 |
98 |
| VCDI |
0 |
0 |
0 |
1 |
4 |
4 |
1254 |
4304 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15617 |
6369 |
2462 |
1493 |
615 |
363 |
216 |
11 |
| OW |
0 |
1 |
83 |
144 |
167 |
177 |
140 |
0 |
| VODI |
0 |
0 |
55 |
101 |
119 |
296 |
419 |
2 |
| ODI |
0 |
0 |
40 |
69 |
134 |
214 |
380 |
1 |
| CDI |
0 |
0 |
4 |
136 |
328 |
371 |
1221 |
6 |
| VCDI |
0 |
0 |
0 |
2 |
8 |
12 |
1987 |
4396 |
|
Date: 2021-06-23:
| 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 |
15685 |
6430 |
2439 |
1789 |
714 |
76 |
183 |
11 |
| OW |
0 |
0 |
63 |
138 |
221 |
135 |
101 |
0 |
| VODI |
0 |
0 |
18 |
109 |
276 |
274 |
274 |
2 |
| ODI |
0 |
0 |
2 |
55 |
234 |
335 |
583 |
1 |
| CDI |
0 |
0 |
0 |
81 |
325 |
271 |
2097 |
142 |
| VCDI |
0 |
0 |
0 |
1 |
64 |
28 |
1572 |
3430 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15685 |
6412 |
2342 |
1759 |
736 |
158 |
249 |
11 |
| OW |
0 |
10 |
60 |
128 |
212 |
141 |
150 |
0 |
| VODI |
0 |
7 |
60 |
92 |
202 |
199 |
414 |
2 |
| ODI |
0 |
1 |
34 |
79 |
165 |
225 |
359 |
1 |
| CDI |
0 |
0 |
26 |
114 |
419 |
342 |
1371 |
90 |
| VCDI |
0 |
0 |
0 |
1 |
100 |
54 |
2267 |
3482 |
|
Date: 2021-06-25:
| 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 |
15598 |
6495 |
2696 |
1897 |
563 |
82 |
139 |
11 |
| OW |
0 |
0 |
60 |
196 |
258 |
112 |
129 |
0 |
| VODI |
0 |
0 |
12 |
134 |
288 |
206 |
353 |
2 |
| ODI |
0 |
0 |
2 |
89 |
239 |
272 |
499 |
1 |
| CDI |
0 |
0 |
0 |
123 |
306 |
317 |
1647 |
90 |
| VCDI |
0 |
0 |
0 |
9 |
174 |
101 |
2272 |
2787 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15598 |
6470 |
2588 |
1912 |
649 |
117 |
215 |
11 |
| OW |
0 |
17 |
88 |
120 |
205 |
120 |
185 |
0 |
| VODI |
0 |
8 |
56 |
116 |
188 |
155 |
416 |
2 |
| ODI |
0 |
0 |
31 |
104 |
182 |
200 |
377 |
1 |
| CDI |
0 |
0 |
7 |
178 |
461 |
391 |
1677 |
42 |
| VCDI |
0 |
0 |
0 |
18 |
143 |
107 |
2169 |
2835 |
|
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