Validation of sea ice concentration
Bulletin date: 2023-07-20
Model vs. observations, sea ice class contingency tables
Date: 2023-07-14:
| 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 |
19200 |
6577 |
1200 |
917 |
252 |
97 |
75 |
0 |
| OW |
0 |
17 |
58 |
275 |
167 |
62 |
17 |
0 |
| VODI |
0 |
2 |
47 |
194 |
386 |
227 |
57 |
0 |
| ODI |
0 |
0 |
17 |
97 |
269 |
308 |
242 |
0 |
| CDI |
0 |
0 |
0 |
63 |
174 |
363 |
1902 |
1372 |
| VCDI |
0 |
0 |
1 |
14 |
32 |
284 |
2157 |
1037 |
|
...date precedes bulletin
|
Date: 2023-07-18:
| 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 |
19510 |
6562 |
1384 |
835 |
204 |
50 |
82 |
0 |
| OW |
0 |
11 |
54 |
166 |
100 |
53 |
17 |
0 |
| VODI |
0 |
1 |
23 |
299 |
324 |
144 |
60 |
0 |
| ODI |
0 |
0 |
8 |
136 |
203 |
274 |
289 |
0 |
| CDI |
0 |
0 |
3 |
46 |
105 |
307 |
2176 |
2061 |
| VCDI |
0 |
0 |
2 |
17 |
15 |
36 |
1051 |
1551 |
|
...date precedes bulletin
|
Date: 2023-07-20:
| 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 |
19445 |
6756 |
1264 |
847 |
212 |
62 |
91 |
0 |
| OW |
0 |
4 |
78 |
136 |
139 |
50 |
18 |
0 |
| VODI |
0 |
0 |
20 |
238 |
396 |
152 |
63 |
0 |
| ODI |
0 |
0 |
0 |
82 |
203 |
275 |
215 |
0 |
| CDI |
0 |
0 |
0 |
54 |
117 |
413 |
2545 |
1860 |
| VCDI |
0 |
0 |
0 |
12 |
13 |
54 |
1302 |
1043 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19445 |
6756 |
1280 |
845 |
232 |
63 |
91 |
0 |
| OW |
0 |
4 |
55 |
149 |
115 |
39 |
16 |
0 |
| VODI |
0 |
0 |
26 |
218 |
401 |
188 |
52 |
0 |
| ODI |
0 |
0 |
1 |
92 |
202 |
252 |
219 |
0 |
| CDI |
0 |
0 |
0 |
53 |
116 |
407 |
2523 |
1875 |
| VCDI |
0 |
0 |
0 |
12 |
14 |
57 |
1333 |
1028 |
|
Date: 2023-07-24:
| 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 |
19162 |
6489 |
1772 |
872 |
274 |
56 |
43 |
0 |
| OW |
0 |
0 |
34 |
224 |
131 |
49 |
15 |
0 |
| VODI |
0 |
0 |
12 |
231 |
417 |
247 |
60 |
0 |
| ODI |
0 |
0 |
21 |
90 |
229 |
332 |
351 |
30 |
| CDI |
0 |
0 |
2 |
30 |
97 |
244 |
2553 |
2967 |
| VCDI |
0 |
0 |
0 |
7 |
19 |
29 |
318 |
752 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19162 |
6489 |
1774 |
918 |
336 |
99 |
47 |
0 |
| OW |
0 |
0 |
28 |
184 |
178 |
105 |
14 |
0 |
| VODI |
0 |
0 |
11 |
193 |
322 |
245 |
108 |
0 |
| ODI |
0 |
0 |
8 |
88 |
166 |
204 |
371 |
19 |
| CDI |
0 |
0 |
20 |
64 |
147 |
275 |
2169 |
2442 |
| VCDI |
0 |
0 |
0 |
7 |
18 |
29 |
631 |
1288 |
|
Date: 2023-07-26:
| 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 |
19307 |
6586 |
1520 |
864 |
361 |
86 |
47 |
0 |
| OW |
0 |
0 |
33 |
163 |
232 |
111 |
13 |
0 |
| VODI |
0 |
0 |
12 |
146 |
396 |
303 |
77 |
0 |
| ODI |
0 |
0 |
20 |
64 |
193 |
318 |
340 |
59 |
| CDI |
0 |
0 |
3 |
30 |
80 |
233 |
2385 |
2751 |
| VCDI |
0 |
0 |
0 |
4 |
17 |
27 |
426 |
952 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19307 |
6586 |
1523 |
851 |
450 |
151 |
50 |
0 |
| OW |
0 |
0 |
22 |
153 |
220 |
145 |
27 |
0 |
| VODI |
0 |
0 |
15 |
126 |
292 |
264 |
113 |
0 |
| ODI |
0 |
0 |
7 |
78 |
180 |
217 |
360 |
36 |
| CDI |
0 |
0 |
20 |
57 |
116 |
267 |
2078 |
2537 |
| VCDI |
0 |
0 |
1 |
6 |
21 |
34 |
660 |
1189 |
|
Date: 2023-07-28:
| 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 |
19411 |
6623 |
1349 |
947 |
357 |
91 |
28 |
0 |
| OW |
0 |
3 |
32 |
197 |
244 |
139 |
18 |
0 |
| VODI |
0 |
0 |
15 |
167 |
361 |
267 |
116 |
0 |
| ODI |
0 |
0 |
6 |
68 |
187 |
271 |
391 |
89 |
| CDI |
0 |
0 |
0 |
26 |
42 |
200 |
2276 |
2396 |
| VCDI |
0 |
0 |
0 |
5 |
16 |
39 |
511 |
1271 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19411 |
6625 |
1345 |
942 |
450 |
172 |
33 |
0 |
| OW |
0 |
1 |
23 |
173 |
234 |
154 |
46 |
0 |
| VODI |
0 |
0 |
13 |
131 |
233 |
186 |
143 |
0 |
| ODI |
0 |
0 |
16 |
91 |
178 |
180 |
415 |
51 |
| CDI |
0 |
0 |
5 |
67 |
97 |
266 |
1975 |
2416 |
| VCDI |
0 |
0 |
0 |
6 |
15 |
49 |
728 |
1289 |
|
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