Validation of sea ice concentration
Bulletin date: 2023-12-21
Model vs. observations, sea ice class contingency tables
Date: 2023-12-15:
| 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 |
14147 |
6708 |
759 |
339 |
143 |
46 |
75 |
0 |
| OW |
0 |
120 |
364 |
211 |
127 |
71 |
29 |
0 |
| VODI |
0 |
84 |
219 |
294 |
202 |
128 |
75 |
0 |
| ODI |
0 |
36 |
78 |
186 |
149 |
178 |
108 |
0 |
| CDI |
0 |
18 |
41 |
122 |
157 |
242 |
364 |
4 |
| VCDI |
0 |
30 |
56 |
156 |
207 |
547 |
8410 |
2929 |
|
...date precedes bulletin
|
Date: 2023-12-19:
| 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 |
14445 |
6692 |
556 |
315 |
34 |
40 |
25 |
0 |
| OW |
0 |
190 |
263 |
209 |
65 |
38 |
11 |
0 |
| VODI |
0 |
71 |
225 |
416 |
175 |
78 |
31 |
0 |
| ODI |
0 |
28 |
43 |
212 |
235 |
209 |
137 |
8 |
| CDI |
0 |
31 |
42 |
146 |
207 |
382 |
556 |
27 |
| VCDI |
0 |
18 |
36 |
157 |
282 |
720 |
7428 |
3376 |
|
...date precedes bulletin
|
Date: 2023-12-21:
| 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 |
13554 |
6784 |
817 |
314 |
104 |
50 |
22 |
0 |
| OW |
0 |
84 |
142 |
165 |
115 |
136 |
4 |
0 |
| VODI |
0 |
73 |
115 |
255 |
192 |
355 |
23 |
0 |
| ODI |
0 |
25 |
43 |
121 |
200 |
436 |
145 |
7 |
| CDI |
0 |
5 |
65 |
70 |
70 |
508 |
515 |
18 |
| VCDI |
0 |
2 |
40 |
135 |
211 |
935 |
6931 |
4373 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13554 |
6778 |
814 |
329 |
118 |
59 |
25 |
0 |
| OW |
0 |
87 |
132 |
159 |
101 |
145 |
2 |
0 |
| VODI |
0 |
73 |
125 |
230 |
175 |
401 |
27 |
0 |
| ODI |
0 |
27 |
42 |
136 |
202 |
387 |
158 |
8 |
| CDI |
0 |
6 |
61 |
72 |
81 |
454 |
455 |
20 |
| VCDI |
0 |
2 |
48 |
134 |
215 |
974 |
6973 |
4370 |
|
Date: 2023-12-25:
| Best estimate |
Forecast |
|
...observations not yet available
|
...observations not yet available
|
Date: 2023-12-27:
| 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 |
13767 |
6620 |
664 |
136 |
40 |
15 |
4 |
0 |
| OW |
0 |
134 |
222 |
94 |
48 |
22 |
5 |
0 |
| VODI |
0 |
39 |
170 |
216 |
105 |
81 |
27 |
0 |
| ODI |
0 |
3 |
85 |
120 |
153 |
250 |
171 |
8 |
| CDI |
0 |
0 |
79 |
108 |
98 |
270 |
505 |
54 |
| VCDI |
0 |
0 |
45 |
124 |
219 |
641 |
7789 |
5028 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13767 |
6519 |
559 |
114 |
30 |
14 |
27 |
0 |
| OW |
0 |
159 |
176 |
74 |
28 |
12 |
23 |
0 |
| VODI |
0 |
94 |
234 |
147 |
63 |
69 |
60 |
0 |
| ODI |
0 |
19 |
114 |
166 |
185 |
245 |
131 |
5 |
| CDI |
0 |
4 |
74 |
102 |
78 |
215 |
306 |
36 |
| VCDI |
0 |
1 |
108 |
195 |
279 |
724 |
7954 |
5049 |
|
Date: 2023-12-29:
| 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 |
13722 |
6661 |
451 |
185 |
38 |
6 |
1 |
0 |
| OW |
0 |
220 |
205 |
108 |
28 |
12 |
4 |
0 |
| VODI |
0 |
88 |
227 |
180 |
76 |
47 |
13 |
0 |
| ODI |
0 |
13 |
93 |
176 |
156 |
211 |
90 |
4 |
| CDI |
0 |
13 |
51 |
136 |
142 |
290 |
402 |
45 |
| VCDI |
0 |
2 |
111 |
220 |
241 |
872 |
8785 |
3834 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13722 |
6458 |
406 |
172 |
27 |
5 |
18 |
0 |
| OW |
0 |
249 |
134 |
77 |
28 |
6 |
19 |
0 |
| VODI |
0 |
187 |
205 |
134 |
50 |
18 |
32 |
0 |
| ODI |
0 |
64 |
114 |
185 |
107 |
101 |
55 |
1 |
| CDI |
0 |
30 |
86 |
150 |
150 |
288 |
246 |
54 |
| VCDI |
0 |
9 |
193 |
287 |
319 |
1020 |
8925 |
3828 |
|
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