Validation of sea ice concentration
Bulletin date: 2023-02-02
Model vs. observations, sea ice class contingency tables
Date: 2023-01-27:
| 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 |
13954 |
6514 |
1150 |
332 |
119 |
96 |
10 |
0 |
| OW |
0 |
43 |
169 |
155 |
84 |
116 |
6 |
0 |
| VODI |
0 |
51 |
131 |
167 |
189 |
232 |
21 |
0 |
| ODI |
0 |
58 |
92 |
122 |
182 |
253 |
96 |
0 |
| CDI |
0 |
24 |
40 |
107 |
150 |
282 |
352 |
3 |
| VCDI |
0 |
42 |
74 |
119 |
256 |
1112 |
7131 |
4125 |
|
...date precedes bulletin
|
Date: 2023-01-31:
| 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 |
13874 |
6607 |
1029 |
410 |
56 |
22 |
0 |
0 |
| OW |
0 |
29 |
231 |
190 |
82 |
46 |
3 |
0 |
| VODI |
0 |
25 |
131 |
169 |
143 |
144 |
8 |
0 |
| ODI |
0 |
18 |
65 |
166 |
177 |
255 |
94 |
3 |
| CDI |
0 |
3 |
61 |
121 |
206 |
298 |
293 |
34 |
| VCDI |
0 |
0 |
45 |
103 |
337 |
943 |
7488 |
4250 |
|
...date precedes bulletin
|
Date: 2023-02-02:
| 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 |
13867 |
6656 |
772 |
397 |
64 |
20 |
0 |
0 |
| OW |
0 |
77 |
189 |
207 |
67 |
49 |
3 |
0 |
| VODI |
0 |
49 |
120 |
189 |
177 |
111 |
15 |
0 |
| ODI |
0 |
25 |
59 |
105 |
138 |
170 |
81 |
0 |
| CDI |
0 |
17 |
77 |
77 |
142 |
242 |
271 |
1 |
| VCDI |
0 |
8 |
72 |
234 |
410 |
1085 |
8060 |
3856 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13867 |
6661 |
765 |
419 |
70 |
26 |
2 |
0 |
| OW |
0 |
78 |
187 |
181 |
63 |
24 |
4 |
0 |
| VODI |
0 |
44 |
114 |
188 |
165 |
104 |
15 |
0 |
| ODI |
0 |
25 |
71 |
112 |
139 |
169 |
72 |
0 |
| CDI |
0 |
16 |
70 |
72 |
134 |
220 |
270 |
1 |
| VCDI |
0 |
8 |
82 |
237 |
427 |
1134 |
8067 |
3856 |
|
Date: 2023-02-06:
| 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 |
14475 |
6538 |
607 |
318 |
129 |
41 |
0 |
0 |
| OW |
0 |
145 |
168 |
142 |
85 |
68 |
9 |
0 |
| VODI |
0 |
62 |
127 |
163 |
114 |
139 |
22 |
0 |
| ODI |
0 |
28 |
46 |
101 |
99 |
180 |
80 |
0 |
| CDI |
0 |
20 |
61 |
66 |
93 |
192 |
260 |
32 |
| VCDI |
0 |
3 |
51 |
37 |
116 |
602 |
6910 |
5830 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14475 |
6309 |
484 |
261 |
105 |
36 |
0 |
0 |
| OW |
0 |
182 |
160 |
99 |
69 |
47 |
6 |
0 |
| VODI |
0 |
138 |
164 |
165 |
90 |
114 |
18 |
0 |
| ODI |
0 |
75 |
82 |
112 |
90 |
108 |
53 |
2 |
| CDI |
0 |
51 |
64 |
89 |
97 |
170 |
296 |
56 |
| VCDI |
0 |
41 |
106 |
101 |
185 |
747 |
6908 |
5804 |
|
Date: 2023-02-08:
| 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 |
14516 |
6714 |
544 |
254 |
29 |
13 |
0 |
0 |
| OW |
0 |
194 |
238 |
175 |
55 |
14 |
4 |
0 |
| VODI |
0 |
100 |
147 |
274 |
119 |
36 |
8 |
0 |
| ODI |
0 |
61 |
60 |
157 |
189 |
106 |
75 |
5 |
| CDI |
0 |
35 |
69 |
143 |
198 |
160 |
242 |
68 |
| VCDI |
0 |
52 |
101 |
279 |
484 |
1062 |
7596 |
3583 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14514 |
6503 |
408 |
182 |
16 |
2 |
2 |
0 |
| OW |
2 |
236 |
190 |
175 |
45 |
11 |
2 |
0 |
| VODI |
0 |
153 |
204 |
196 |
80 |
37 |
19 |
0 |
| ODI |
0 |
82 |
103 |
150 |
122 |
80 |
108 |
2 |
| CDI |
0 |
51 |
78 |
170 |
135 |
124 |
276 |
56 |
| VCDI |
0 |
131 |
176 |
409 |
676 |
1137 |
7518 |
3598 |
|
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 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14359 |
6492 |
538 |
261 |
69 |
4 |
2 |
0 |
| OW |
2 |
266 |
151 |
115 |
72 |
12 |
2 |
0 |
| VODI |
0 |
182 |
135 |
132 |
88 |
23 |
6 |
0 |
| ODI |
0 |
110 |
109 |
89 |
80 |
40 |
41 |
22 |
| CDI |
0 |
73 |
95 |
135 |
100 |
113 |
191 |
112 |
| VCDI |
0 |
161 |
459 |
1017 |
783 |
851 |
6943 |
3724 |
|
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