Validation of sea ice concentration
Bulletin date: 2023-12-07
Model vs. observations, sea ice class contingency tables
Date: 2023-12-01:
| 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 |
15119 |
6290 |
942 |
352 |
249 |
258 |
108 |
0 |
| OW |
0 |
106 |
234 |
107 |
93 |
55 |
26 |
0 |
| VODI |
0 |
37 |
200 |
135 |
133 |
128 |
68 |
0 |
| ODI |
0 |
8 |
63 |
82 |
115 |
246 |
103 |
0 |
| CDI |
0 |
0 |
30 |
68 |
172 |
455 |
339 |
16 |
| VCDI |
0 |
0 |
35 |
43 |
121 |
742 |
6736 |
4145 |
|
...date precedes bulletin
|
Date: 2023-12-05:
| 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 |
14453 |
6607 |
1105 |
299 |
115 |
184 |
121 |
0 |
| OW |
0 |
41 |
197 |
155 |
73 |
52 |
41 |
0 |
| VODI |
0 |
10 |
137 |
156 |
132 |
100 |
121 |
0 |
| ODI |
0 |
2 |
62 |
86 |
105 |
175 |
146 |
0 |
| CDI |
0 |
0 |
25 |
51 |
101 |
340 |
566 |
52 |
| VCDI |
0 |
0 |
10 |
13 |
33 |
346 |
5317 |
6630 |
|
...date precedes bulletin
|
Date: 2023-12-07:
| 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 |
14638 |
6542 |
837 |
216 |
110 |
123 |
99 |
0 |
| OW |
0 |
99 |
218 |
165 |
54 |
47 |
32 |
0 |
| VODI |
0 |
55 |
110 |
220 |
110 |
72 |
83 |
0 |
| ODI |
0 |
22 |
60 |
126 |
88 |
162 |
109 |
1 |
| CDI |
0 |
12 |
30 |
112 |
115 |
340 |
407 |
13 |
| VCDI |
0 |
5 |
15 |
42 |
76 |
511 |
8293 |
3790 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14638 |
6564 |
891 |
243 |
120 |
133 |
104 |
0 |
| OW |
0 |
72 |
163 |
155 |
54 |
42 |
25 |
0 |
| VODI |
0 |
64 |
110 |
195 |
100 |
66 |
83 |
0 |
| ODI |
0 |
17 |
60 |
125 |
78 |
157 |
110 |
1 |
| CDI |
0 |
14 |
34 |
110 |
120 |
308 |
438 |
14 |
| VCDI |
0 |
4 |
12 |
53 |
81 |
549 |
8263 |
3789 |
|
Date: 2023-12-11:
| 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 |
14242 |
6895 |
763 |
363 |
189 |
118 |
82 |
0 |
| OW |
0 |
75 |
285 |
204 |
98 |
56 |
10 |
0 |
| VODI |
0 |
26 |
162 |
229 |
177 |
113 |
29 |
0 |
| ODI |
0 |
11 |
45 |
173 |
152 |
152 |
76 |
0 |
| CDI |
0 |
9 |
27 |
138 |
210 |
289 |
283 |
11 |
| VCDI |
0 |
13 |
23 |
100 |
205 |
1556 |
7640 |
2930 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14242 |
6674 |
691 |
303 |
184 |
137 |
90 |
0 |
| OW |
0 |
188 |
196 |
168 |
106 |
54 |
19 |
0 |
| VODI |
0 |
93 |
176 |
172 |
142 |
110 |
40 |
0 |
| ODI |
0 |
20 |
109 |
154 |
116 |
100 |
82 |
0 |
| CDI |
0 |
19 |
70 |
182 |
198 |
194 |
216 |
16 |
| VCDI |
0 |
35 |
63 |
228 |
285 |
1689 |
7673 |
2925 |
|
Date: 2023-12-13:
| 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 |
14032 |
6739 |
758 |
363 |
190 |
179 |
48 |
0 |
| OW |
0 |
96 |
301 |
224 |
129 |
60 |
15 |
0 |
| VODI |
0 |
79 |
206 |
186 |
186 |
191 |
23 |
0 |
| ODI |
0 |
32 |
107 |
88 |
130 |
203 |
84 |
8 |
| CDI |
0 |
25 |
96 |
128 |
124 |
212 |
298 |
13 |
| VCDI |
0 |
22 |
67 |
165 |
180 |
591 |
8326 |
3255 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14030 |
6603 |
700 |
340 |
239 |
231 |
73 |
0 |
| OW |
2 |
163 |
216 |
163 |
85 |
82 |
27 |
0 |
| VODI |
0 |
107 |
204 |
184 |
141 |
161 |
52 |
1 |
| ODI |
0 |
45 |
152 |
113 |
123 |
151 |
114 |
8 |
| CDI |
0 |
29 |
124 |
144 |
121 |
181 |
275 |
11 |
| VCDI |
0 |
46 |
139 |
210 |
230 |
630 |
8253 |
3256 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14146 |
6621 |
763 |
351 |
159 |
85 |
107 |
0 |
| OW |
1 |
155 |
261 |
167 |
112 |
62 |
43 |
0 |
| VODI |
0 |
82 |
224 |
205 |
167 |
97 |
63 |
0 |
| ODI |
0 |
67 |
122 |
186 |
144 |
167 |
122 |
1 |
| CDI |
0 |
33 |
71 |
187 |
110 |
168 |
280 |
11 |
| VCDI |
0 |
38 |
76 |
212 |
293 |
633 |
8446 |
2921 |
|
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