Validation of sea ice concentration
Bulletin date: 2023-10-26
Model vs. observations, sea ice class contingency tables
Date: 2023-10-20:
| 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 |
21857 |
5627 |
650 |
303 |
129 |
95 |
50 |
0 |
| OW |
49 |
234 |
120 |
123 |
74 |
59 |
43 |
0 |
| VODI |
2 |
3 |
48 |
92 |
96 |
146 |
47 |
0 |
| ODI |
0 |
0 |
15 |
50 |
57 |
122 |
64 |
0 |
| CDI |
0 |
0 |
14 |
38 |
59 |
179 |
176 |
0 |
| VCDI |
0 |
0 |
6 |
17 |
66 |
406 |
3747 |
3296 |
|
...date precedes bulletin
|
Date: 2023-10-24:
| 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 |
21022 |
6155 |
740 |
317 |
189 |
98 |
71 |
0 |
| OW |
0 |
104 |
148 |
159 |
145 |
66 |
37 |
0 |
| VODI |
0 |
9 |
59 |
113 |
162 |
140 |
42 |
0 |
| ODI |
0 |
0 |
10 |
40 |
67 |
87 |
81 |
0 |
| CDI |
0 |
0 |
3 |
19 |
74 |
192 |
432 |
0 |
| VCDI |
0 |
0 |
2 |
5 |
33 |
281 |
4355 |
2702 |
|
...date precedes bulletin
|
Date: 2023-10-26:
| 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 |
20573 |
5705 |
854 |
506 |
158 |
60 |
77 |
0 |
| OW |
1 |
87 |
201 |
462 |
105 |
38 |
48 |
0 |
| VODI |
0 |
11 |
41 |
280 |
224 |
78 |
61 |
0 |
| ODI |
0 |
0 |
7 |
98 |
125 |
77 |
92 |
0 |
| CDI |
0 |
0 |
2 |
52 |
92 |
171 |
344 |
0 |
| VCDI |
0 |
0 |
0 |
20 |
52 |
410 |
4654 |
2393 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20573 |
5666 |
804 |
525 |
168 |
61 |
81 |
0 |
| OW |
1 |
119 |
245 |
406 |
124 |
37 |
40 |
0 |
| VODI |
0 |
18 |
45 |
303 |
187 |
83 |
69 |
0 |
| ODI |
0 |
0 |
8 |
112 |
132 |
65 |
89 |
0 |
| CDI |
0 |
0 |
3 |
50 |
87 |
177 |
354 |
0 |
| VCDI |
0 |
0 |
0 |
22 |
58 |
411 |
4643 |
2393 |
|
Date: 2023-10-30:
| 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 |
19175 |
6002 |
765 |
702 |
221 |
196 |
7 |
0 |
| OW |
0 |
2 |
51 |
187 |
125 |
66 |
18 |
0 |
| VODI |
0 |
0 |
14 |
205 |
227 |
221 |
34 |
0 |
| ODI |
0 |
0 |
2 |
53 |
190 |
401 |
68 |
0 |
| CDI |
0 |
0 |
0 |
22 |
245 |
886 |
434 |
0 |
| VCDI |
0 |
0 |
0 |
5 |
67 |
394 |
4274 |
2900 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19175 |
5937 |
659 |
758 |
284 |
293 |
42 |
0 |
| OW |
0 |
67 |
131 |
198 |
147 |
219 |
31 |
0 |
| VODI |
0 |
0 |
40 |
122 |
273 |
610 |
71 |
0 |
| ODI |
0 |
0 |
1 |
46 |
197 |
231 |
79 |
0 |
| CDI |
0 |
0 |
1 |
34 |
105 |
340 |
321 |
0 |
| VCDI |
0 |
0 |
0 |
16 |
69 |
471 |
4291 |
2900 |
|
Date: 2023-11-01:
| 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 |
18617 |
6503 |
783 |
647 |
179 |
162 |
35 |
0 |
| OW |
0 |
12 |
75 |
185 |
119 |
55 |
28 |
0 |
| VODI |
0 |
0 |
26 |
194 |
287 |
128 |
45 |
0 |
| ODI |
0 |
0 |
7 |
98 |
210 |
296 |
86 |
0 |
| CDI |
0 |
0 |
2 |
31 |
99 |
759 |
335 |
9 |
| VCDI |
0 |
0 |
1 |
32 |
87 |
512 |
4716 |
2799 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18617 |
6419 |
662 |
591 |
269 |
210 |
88 |
0 |
| OW |
0 |
94 |
154 |
157 |
171 |
89 |
31 |
0 |
| VODI |
0 |
2 |
60 |
210 |
189 |
493 |
94 |
0 |
| ODI |
0 |
0 |
10 |
114 |
147 |
417 |
113 |
1 |
| CDI |
0 |
0 |
6 |
67 |
137 |
259 |
358 |
14 |
| VCDI |
0 |
0 |
2 |
48 |
68 |
444 |
4561 |
2793 |
|
Date: 2023-11-03:
| 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 |
17879 |
7082 |
842 |
395 |
229 |
243 |
42 |
0 |
| OW |
1 |
24 |
154 |
143 |
72 |
61 |
37 |
0 |
| VODI |
0 |
4 |
48 |
149 |
200 |
125 |
55 |
0 |
| ODI |
0 |
0 |
7 |
99 |
142 |
302 |
85 |
0 |
| CDI |
0 |
0 |
0 |
65 |
109 |
427 |
248 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
42 |
812 |
4510 |
3523 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17880 |
6931 |
740 |
411 |
272 |
267 |
101 |
0 |
| OW |
0 |
153 |
113 |
90 |
85 |
78 |
42 |
0 |
| VODI |
0 |
26 |
173 |
142 |
112 |
308 |
80 |
0 |
| ODI |
0 |
0 |
23 |
133 |
114 |
440 |
162 |
0 |
| CDI |
0 |
0 |
2 |
66 |
145 |
442 |
263 |
0 |
| VCDI |
0 |
0 |
0 |
12 |
66 |
435 |
4329 |
3523 |
|
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