Validation of sea ice concentration
Bulletin date: 2023-09-07
Model vs. observations, sea ice class contingency tables
Date: 2023-09-01:
| 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 |
101411 |
16627 |
4812 |
1729 |
330 |
56 |
22 |
3 |
| OW |
0 |
72 |
1110 |
1502 |
684 |
211 |
33 |
0 |
| VODI |
0 |
10 |
380 |
928 |
1688 |
1196 |
248 |
0 |
| ODI |
0 |
3 |
77 |
302 |
608 |
1738 |
3316 |
310 |
| CDI |
0 |
0 |
12 |
56 |
198 |
403 |
8719 |
6327 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
3 |
2754 |
742 |
|
...date precedes bulletin
|
Date: 2023-09-05:
| 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 |
104142 |
16688 |
3576 |
1729 |
178 |
14 |
52 |
2 |
| OW |
0 |
433 |
1035 |
1705 |
550 |
70 |
88 |
0 |
| VODI |
0 |
33 |
182 |
1693 |
1649 |
583 |
434 |
0 |
| ODI |
0 |
19 |
13 |
288 |
707 |
1415 |
3410 |
921 |
| CDI |
0 |
0 |
5 |
64 |
125 |
445 |
7185 |
6457 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
4 |
1931 |
795 |
|
...date precedes bulletin
|
Date: 2023-09-07:
| 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 |
104743 |
16248 |
3909 |
1221 |
414 |
40 |
31 |
8 |
| OW |
0 |
289 |
1175 |
725 |
1045 |
367 |
135 |
0 |
| VODI |
0 |
11 |
390 |
541 |
1628 |
1317 |
783 |
0 |
| ODI |
0 |
0 |
59 |
56 |
317 |
1269 |
4337 |
1028 |
| CDI |
0 |
0 |
9 |
61 |
62 |
228 |
5995 |
6069 |
| VCDI |
0 |
0 |
0 |
0 |
20 |
40 |
1858 |
2192 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104677 |
16070 |
3732 |
1124 |
420 |
35 |
62 |
0 |
| OW |
0 |
410 |
887 |
758 |
988 |
370 |
156 |
0 |
| VODI |
0 |
53 |
614 |
506 |
1363 |
932 |
541 |
0 |
| ODI |
0 |
0 |
244 |
113 |
540 |
1148 |
2457 |
955 |
| CDI |
0 |
0 |
45 |
75 |
153 |
737 |
8161 |
6001 |
| VCDI |
0 |
0 |
0 |
13 |
10 |
33 |
1753 |
2332 |
|
Date: 2023-09-11:
| 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 |
105676 |
15075 |
4818 |
1027 |
200 |
9 |
8 |
8 |
| OW |
0 |
265 |
1592 |
1280 |
776 |
113 |
24 |
1 |
| VODI |
0 |
2 |
321 |
1284 |
1757 |
1521 |
219 |
1 |
| ODI |
0 |
0 |
13 |
226 |
555 |
2114 |
4425 |
7 |
| CDI |
0 |
0 |
0 |
13 |
26 |
111 |
4545 |
4400 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1 |
2125 |
4079 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
105600 |
14607 |
4169 |
885 |
221 |
7 |
9 |
0 |
| OW |
0 |
546 |
1395 |
1273 |
831 |
77 |
14 |
0 |
| VODI |
0 |
171 |
738 |
975 |
1330 |
875 |
174 |
0 |
| ODI |
0 |
13 |
379 |
504 |
669 |
1880 |
2524 |
4 |
| CDI |
0 |
0 |
33 |
189 |
253 |
1027 |
5872 |
2965 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
2 |
2742 |
5514 |
|
Date: 2023-09-13:
| 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 |
104758 |
16910 |
3338 |
952 |
196 |
6 |
7 |
8 |
| OW |
0 |
876 |
1135 |
1674 |
432 |
28 |
31 |
0 |
| VODI |
0 |
28 |
246 |
1464 |
2164 |
869 |
277 |
0 |
| ODI |
0 |
3 |
2 |
236 |
791 |
2181 |
3928 |
0 |
| CDI |
0 |
0 |
0 |
31 |
43 |
187 |
4378 |
3897 |
| VCDI |
0 |
0 |
0 |
12 |
15 |
18 |
3224 |
4275 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
104689 |
16060 |
3007 |
911 |
183 |
6 |
4 |
0 |
| OW |
0 |
1086 |
970 |
1442 |
747 |
92 |
33 |
0 |
| VODI |
0 |
500 |
398 |
1224 |
1273 |
477 |
238 |
0 |
| ODI |
0 |
158 |
273 |
607 |
1034 |
1393 |
2043 |
0 |
| CDI |
0 |
1 |
43 |
157 |
379 |
1292 |
5589 |
2134 |
| VCDI |
0 |
0 |
0 |
20 |
13 |
27 |
3927 |
6038 |
|
Date: 2023-09-15:
| 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 |
103437 |
17051 |
3585 |
964 |
293 |
8 |
11 |
3 |
| OW |
0 |
524 |
1325 |
1771 |
614 |
172 |
28 |
0 |
| VODI |
0 |
63 |
194 |
1171 |
1993 |
1326 |
277 |
0 |
| ODI |
0 |
2 |
1 |
230 |
804 |
2389 |
3586 |
0 |
| CDI |
0 |
0 |
0 |
46 |
114 |
234 |
4581 |
3623 |
| VCDI |
0 |
0 |
0 |
8 |
18 |
49 |
3538 |
4587 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
103368 |
16011 |
3657 |
1207 |
304 |
7 |
2 |
0 |
| OW |
0 |
892 |
690 |
1389 |
1017 |
410 |
13 |
0 |
| VODI |
0 |
540 |
376 |
914 |
1127 |
790 |
98 |
0 |
| ODI |
0 |
98 |
234 |
429 |
752 |
1327 |
1795 |
0 |
| CDI |
0 |
88 |
117 |
223 |
616 |
1605 |
4526 |
1601 |
| VCDI |
0 |
0 |
0 |
20 |
9 |
36 |
5571 |
6609 |
|
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