Validation of sea ice concentration
Bulletin date: 2024-09-19
Model vs. observations, sea ice class contingency tables
Date: 2024-09-13:
| 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 |
118348 |
12717 |
2857 |
1012 |
149 |
4 |
2 |
0 |
| OW |
0 |
77 |
596 |
1005 |
623 |
27 |
10 |
0 |
| VODI |
0 |
0 |
104 |
564 |
972 |
465 |
252 |
0 |
| ODI |
0 |
0 |
0 |
169 |
346 |
569 |
1161 |
0 |
| CDI |
0 |
0 |
0 |
25 |
144 |
467 |
4773 |
41 |
| VCDI |
0 |
0 |
0 |
3 |
2 |
30 |
4997 |
5957 |
|
...date precedes bulletin
|
Date: 2024-09-17:
| 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 |
111737 |
19131 |
2612 |
1015 |
295 |
12 |
0 |
0 |
| OW |
0 |
212 |
597 |
627 |
395 |
46 |
14 |
0 |
| VODI |
0 |
10 |
317 |
553 |
916 |
480 |
56 |
0 |
| ODI |
0 |
0 |
15 |
121 |
352 |
1014 |
494 |
0 |
| CDI |
0 |
0 |
0 |
27 |
105 |
458 |
4786 |
1704 |
| VCDI |
0 |
0 |
0 |
0 |
10 |
22 |
4053 |
6282 |
|
...date precedes bulletin
|
Date: 2024-09-19:
| 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 |
21611 |
12268 |
356 |
156 |
6 |
6 |
0 |
0 |
| OW |
0 |
475 |
287 |
663 |
159 |
21 |
3 |
0 |
| VODI |
0 |
40 |
214 |
540 |
518 |
393 |
117 |
0 |
| ODI |
0 |
0 |
9 |
181 |
269 |
581 |
552 |
0 |
| CDI |
0 |
0 |
0 |
53 |
67 |
310 |
3973 |
261 |
| VCDI |
0 |
0 |
0 |
7 |
45 |
70 |
4540 |
7874 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21611 |
12328 |
385 |
220 |
9 |
2 |
2 |
0 |
| OW |
0 |
423 |
259 |
663 |
186 |
22 |
1 |
0 |
| VODI |
0 |
32 |
220 |
526 |
524 |
405 |
120 |
0 |
| ODI |
0 |
0 |
2 |
137 |
244 |
610 |
604 |
0 |
| CDI |
0 |
0 |
0 |
47 |
67 |
278 |
3943 |
15 |
| VCDI |
0 |
0 |
0 |
7 |
34 |
64 |
4515 |
8120 |
|
Date: 2024-09-23:
| 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 |
112988 |
17789 |
2202 |
739 |
246 |
5 |
0 |
0 |
| OW |
0 |
373 |
398 |
510 |
293 |
68 |
9 |
0 |
| VODI |
0 |
35 |
150 |
408 |
664 |
453 |
74 |
0 |
| ODI |
0 |
2 |
7 |
146 |
428 |
549 |
225 |
0 |
| CDI |
0 |
0 |
0 |
65 |
154 |
628 |
1773 |
1 |
| VCDI |
0 |
0 |
0 |
26 |
29 |
155 |
8223 |
8653 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
112987 |
17875 |
2274 |
931 |
336 |
6 |
0 |
0 |
| OW |
1 |
289 |
350 |
414 |
601 |
336 |
41 |
0 |
| VODI |
0 |
35 |
133 |
370 |
538 |
638 |
209 |
0 |
| ODI |
0 |
0 |
0 |
82 |
216 |
419 |
469 |
0 |
| CDI |
0 |
0 |
0 |
62 |
88 |
363 |
1796 |
0 |
| VCDI |
0 |
0 |
0 |
35 |
35 |
96 |
7789 |
8654 |
|
Date: 2024-09-25:
| 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 |
110742 |
20117 |
1686 |
768 |
137 |
21 |
0 |
0 |
| OW |
0 |
476 |
371 |
521 |
245 |
45 |
2 |
0 |
| VODI |
0 |
114 |
141 |
588 |
510 |
230 |
23 |
0 |
| ODI |
0 |
8 |
38 |
178 |
363 |
465 |
148 |
0 |
| CDI |
0 |
1 |
21 |
51 |
245 |
575 |
1592 |
38 |
| VCDI |
0 |
0 |
0 |
3 |
42 |
349 |
7650 |
9964 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
110740 |
20172 |
1778 |
957 |
297 |
24 |
0 |
0 |
| OW |
2 |
470 |
275 |
595 |
446 |
197 |
45 |
0 |
| VODI |
0 |
65 |
157 |
418 |
406 |
429 |
150 |
0 |
| ODI |
0 |
7 |
22 |
95 |
194 |
375 |
312 |
0 |
| CDI |
0 |
2 |
23 |
41 |
166 |
378 |
1492 |
43 |
| VCDI |
0 |
0 |
2 |
3 |
33 |
282 |
7416 |
9959 |
|
Date: 2024-09-27:
| 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 |
111121 |
19568 |
1945 |
711 |
159 |
11 |
0 |
0 |
| OW |
0 |
402 |
385 |
482 |
159 |
91 |
0 |
0 |
| VODI |
0 |
93 |
215 |
509 |
360 |
202 |
21 |
0 |
| ODI |
0 |
41 |
84 |
239 |
218 |
207 |
122 |
0 |
| CDI |
0 |
27 |
44 |
174 |
260 |
413 |
796 |
41 |
| VCDI |
0 |
0 |
19 |
25 |
110 |
574 |
8875 |
9765 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
111117 |
19599 |
2107 |
947 |
273 |
16 |
0 |
0 |
| OW |
4 |
346 |
292 |
539 |
324 |
241 |
31 |
0 |
| VODI |
0 |
114 |
183 |
336 |
258 |
236 |
188 |
0 |
| ODI |
0 |
37 |
50 |
213 |
182 |
182 |
292 |
40 |
| CDI |
0 |
35 |
37 |
63 |
154 |
408 |
1160 |
105 |
| VCDI |
0 |
0 |
23 |
42 |
75 |
415 |
8143 |
9661 |
|
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