Validation of sea ice concentration
Bulletin date: 2023-02-16
Model vs. observations, sea ice class contingency tables
Date: 2023-02-10:
| 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 |
14361 |
6755 |
565 |
216 |
37 |
3 |
0 |
0 |
| OW |
0 |
221 |
229 |
172 |
55 |
13 |
1 |
0 |
| VODI |
0 |
161 |
208 |
187 |
104 |
48 |
12 |
0 |
| ODI |
0 |
58 |
109 |
189 |
147 |
84 |
47 |
24 |
| CDI |
0 |
43 |
86 |
186 |
182 |
160 |
246 |
126 |
| VCDI |
0 |
46 |
290 |
799 |
667 |
735 |
6879 |
3708 |
|
...date precedes bulletin
|
Date: 2023-02-14:
| 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 |
14025 |
6662 |
992 |
314 |
63 |
21 |
5 |
0 |
| OW |
0 |
35 |
233 |
206 |
86 |
27 |
4 |
0 |
| VODI |
0 |
16 |
148 |
197 |
196 |
100 |
18 |
0 |
| ODI |
0 |
4 |
57 |
190 |
171 |
152 |
70 |
4 |
| CDI |
0 |
1 |
45 |
169 |
155 |
254 |
296 |
19 |
| VCDI |
0 |
1 |
128 |
411 |
561 |
1314 |
6908 |
3901 |
|
...date precedes bulletin
|
Date: 2023-02-16:
| 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 |
14016 |
6715 |
873 |
231 |
90 |
30 |
8 |
0 |
| OW |
0 |
73 |
247 |
142 |
82 |
29 |
1 |
0 |
| VODI |
0 |
37 |
178 |
160 |
164 |
162 |
12 |
0 |
| ODI |
0 |
17 |
61 |
123 |
157 |
194 |
74 |
0 |
| CDI |
0 |
27 |
39 |
107 |
142 |
300 |
249 |
4 |
| VCDI |
0 |
14 |
179 |
286 |
526 |
1570 |
7371 |
3469 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14016 |
6726 |
898 |
226 |
90 |
34 |
8 |
0 |
| OW |
0 |
68 |
218 |
147 |
68 |
25 |
1 |
0 |
| VODI |
0 |
34 |
180 |
159 |
165 |
141 |
12 |
0 |
| ODI |
0 |
19 |
61 |
113 |
172 |
206 |
67 |
0 |
| CDI |
0 |
25 |
39 |
112 |
133 |
302 |
287 |
4 |
| VCDI |
0 |
11 |
181 |
292 |
533 |
1577 |
7340 |
3469 |
|
Date: 2023-02-20:
| 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 |
13776 |
6675 |
943 |
295 |
116 |
34 |
1 |
0 |
| OW |
0 |
43 |
175 |
151 |
108 |
42 |
5 |
0 |
| VODI |
0 |
39 |
160 |
195 |
189 |
146 |
22 |
0 |
| ODI |
0 |
19 |
58 |
132 |
201 |
370 |
75 |
0 |
| CDI |
0 |
28 |
48 |
104 |
173 |
562 |
279 |
5 |
| VCDI |
0 |
13 |
94 |
164 |
364 |
1565 |
7821 |
2969 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13776 |
6556 |
823 |
226 |
88 |
34 |
1 |
0 |
| OW |
0 |
95 |
189 |
155 |
78 |
60 |
3 |
0 |
| VODI |
0 |
49 |
192 |
201 |
146 |
158 |
16 |
0 |
| ODI |
0 |
36 |
86 |
160 |
160 |
243 |
87 |
3 |
| CDI |
0 |
27 |
43 |
79 |
202 |
405 |
332 |
17 |
| VCDI |
0 |
54 |
145 |
220 |
477 |
1819 |
7764 |
2954 |
|
Date: 2023-02-22:
| 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 |
13550 |
6561 |
943 |
320 |
160 |
59 |
1 |
0 |
| OW |
0 |
29 |
164 |
114 |
105 |
66 |
11 |
0 |
| VODI |
0 |
6 |
139 |
155 |
132 |
202 |
24 |
0 |
| ODI |
0 |
0 |
67 |
116 |
165 |
231 |
84 |
0 |
| CDI |
0 |
0 |
43 |
90 |
121 |
569 |
229 |
21 |
| VCDI |
0 |
0 |
37 |
91 |
208 |
1490 |
8293 |
3563 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13550 |
6446 |
834 |
263 |
122 |
59 |
0 |
0 |
| OW |
0 |
91 |
161 |
115 |
94 |
78 |
3 |
0 |
| VODI |
0 |
52 |
148 |
133 |
141 |
159 |
40 |
0 |
| ODI |
0 |
7 |
116 |
116 |
117 |
283 |
70 |
0 |
| CDI |
0 |
0 |
69 |
107 |
148 |
462 |
265 |
28 |
| VCDI |
0 |
0 |
65 |
152 |
269 |
1576 |
8264 |
3556 |
|
Date: 2023-02-24:
| 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 |
13605 |
6458 |
947 |
397 |
141 |
47 |
0 |
0 |
| OW |
0 |
74 |
163 |
105 |
86 |
35 |
0 |
0 |
| VODI |
0 |
45 |
141 |
144 |
120 |
120 |
4 |
2 |
| ODI |
0 |
26 |
71 |
100 |
155 |
156 |
46 |
11 |
| CDI |
0 |
28 |
62 |
67 |
158 |
366 |
231 |
45 |
| VCDI |
0 |
21 |
147 |
125 |
244 |
1394 |
8001 |
4071 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13596 |
6213 |
842 |
375 |
124 |
37 |
0 |
0 |
| OW |
7 |
175 |
169 |
102 |
92 |
54 |
0 |
0 |
| VODI |
2 |
114 |
137 |
84 |
120 |
133 |
10 |
2 |
| ODI |
0 |
58 |
95 |
99 |
111 |
202 |
101 |
6 |
| CDI |
0 |
43 |
69 |
85 |
134 |
418 |
206 |
14 |
| VCDI |
0 |
49 |
219 |
193 |
323 |
1274 |
7965 |
4107 |
|
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