Validation of sea ice concentration
Bulletin date: 2024-09-26
Model vs. observations, sea ice class contingency tables
Date: 2024-09-20:
| 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 |
110237 |
21331 |
2186 |
1212 |
28 |
0 |
1 |
0 |
| OW |
0 |
470 |
374 |
1068 |
179 |
27 |
7 |
0 |
| VODI |
0 |
92 |
230 |
750 |
512 |
317 |
179 |
0 |
| ODI |
0 |
0 |
18 |
310 |
277 |
383 |
583 |
0 |
| CDI |
0 |
0 |
0 |
89 |
107 |
392 |
3764 |
4 |
| VCDI |
0 |
0 |
0 |
14 |
54 |
45 |
5074 |
8154 |
|
...date precedes bulletin
|
Date: 2024-09-24:
| 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 |
112480 |
18606 |
1768 |
695 |
90 |
4 |
0 |
0 |
| OW |
0 |
576 |
367 |
558 |
171 |
19 |
0 |
0 |
| VODI |
0 |
78 |
183 |
601 |
606 |
213 |
17 |
0 |
| ODI |
0 |
2 |
16 |
280 |
418 |
418 |
97 |
0 |
| CDI |
0 |
0 |
1 |
122 |
267 |
677 |
1628 |
0 |
| VCDI |
0 |
0 |
0 |
42 |
48 |
275 |
8364 |
8781 |
|
...date precedes bulletin
|
Date: 2024-09-26:
| 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 |
110500 |
19774 |
2225 |
651 |
268 |
28 |
0 |
0 |
| OW |
0 |
242 |
470 |
433 |
338 |
123 |
8 |
0 |
| VODI |
0 |
54 |
125 |
483 |
507 |
301 |
72 |
0 |
| ODI |
0 |
21 |
19 |
145 |
282 |
323 |
222 |
0 |
| CDI |
0 |
6 |
38 |
55 |
175 |
476 |
1162 |
31 |
| VCDI |
0 |
0 |
7 |
16 |
69 |
296 |
7798 |
10725 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
110500 |
19754 |
2329 |
714 |
309 |
34 |
0 |
0 |
| OW |
0 |
252 |
392 |
425 |
347 |
113 |
17 |
0 |
| VODI |
0 |
66 |
94 |
445 |
491 |
321 |
75 |
0 |
| ODI |
0 |
19 |
28 |
126 |
244 |
343 |
276 |
0 |
| CDI |
0 |
6 |
33 |
58 |
173 |
448 |
1169 |
37 |
| VCDI |
0 |
0 |
8 |
15 |
75 |
288 |
7725 |
10719 |
|
Date: 2024-09-30:
| 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 |
117176 |
13603 |
1963 |
309 |
60 |
0 |
0 |
0 |
| OW |
0 |
709 |
471 |
212 |
92 |
0 |
0 |
0 |
| VODI |
0 |
84 |
316 |
457 |
197 |
126 |
20 |
0 |
| ODI |
0 |
0 |
79 |
275 |
266 |
270 |
128 |
0 |
| CDI |
0 |
0 |
10 |
239 |
325 |
718 |
906 |
1 |
| VCDI |
0 |
0 |
0 |
112 |
204 |
626 |
10300 |
8214 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
117176 |
13607 |
2038 |
485 |
167 |
0 |
0 |
0 |
| OW |
0 |
465 |
294 |
231 |
205 |
50 |
0 |
0 |
| VODI |
0 |
244 |
184 |
216 |
189 |
188 |
35 |
0 |
| ODI |
0 |
78 |
149 |
174 |
111 |
288 |
93 |
0 |
| CDI |
0 |
2 |
164 |
286 |
163 |
411 |
504 |
0 |
| VCDI |
0 |
0 |
10 |
212 |
309 |
803 |
10722 |
8215 |
|
Date: 2024-10-02:
| 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 |
107397 |
21602 |
2215 |
795 |
179 |
41 |
2 |
0 |
| OW |
0 |
264 |
665 |
454 |
190 |
121 |
0 |
0 |
| VODI |
0 |
12 |
172 |
225 |
288 |
367 |
5 |
0 |
| ODI |
0 |
0 |
12 |
128 |
169 |
465 |
100 |
0 |
| CDI |
0 |
0 |
2 |
111 |
233 |
856 |
759 |
0 |
| VCDI |
0 |
0 |
0 |
59 |
128 |
706 |
12952 |
6794 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
107397 |
21634 |
2313 |
845 |
301 |
138 |
2 |
0 |
| OW |
0 |
180 |
402 |
389 |
140 |
314 |
2 |
0 |
| VODI |
0 |
60 |
175 |
186 |
213 |
332 |
122 |
0 |
| ODI |
0 |
4 |
100 |
104 |
125 |
323 |
193 |
0 |
| CDI |
0 |
0 |
72 |
132 |
224 |
551 |
479 |
0 |
| VCDI |
0 |
0 |
4 |
116 |
184 |
898 |
13020 |
6794 |
|
Date: 2024-10-04:
| 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 |
106556 |
20365 |
2978 |
888 |
207 |
48 |
2 |
0 |
| OW |
0 |
171 |
537 |
499 |
360 |
251 |
0 |
0 |
| VODI |
0 |
1 |
112 |
313 |
328 |
411 |
15 |
0 |
| ODI |
0 |
0 |
7 |
155 |
244 |
362 |
76 |
0 |
| CDI |
0 |
0 |
1 |
91 |
295 |
765 |
701 |
0 |
| VCDI |
0 |
0 |
0 |
58 |
129 |
906 |
13727 |
6909 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
106556 |
20521 |
3196 |
984 |
397 |
241 |
2 |
0 |
| OW |
0 |
16 |
338 |
445 |
324 |
385 |
6 |
0 |
| VODI |
0 |
0 |
82 |
281 |
289 |
426 |
133 |
0 |
| ODI |
0 |
0 |
15 |
107 |
193 |
320 |
277 |
0 |
| CDI |
0 |
0 |
4 |
113 |
206 |
458 |
783 |
0 |
| VCDI |
0 |
0 |
0 |
74 |
154 |
913 |
13320 |
6909 |
|
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