Validation of sea ice concentration
Bulletin date: 2023-04-20
Model vs. observations, sea ice class contingency tables
Date: 2023-04-14:
| 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 |
13275 |
5869 |
622 |
434 |
81 |
40 |
21 |
0 |
| OW |
0 |
106 |
93 |
181 |
92 |
31 |
35 |
0 |
| VODI |
0 |
47 |
91 |
189 |
100 |
68 |
85 |
0 |
| ODI |
0 |
19 |
65 |
110 |
102 |
85 |
128 |
0 |
| CDI |
0 |
16 |
35 |
128 |
182 |
216 |
872 |
0 |
| VCDI |
0 |
14 |
25 |
83 |
294 |
1001 |
10239 |
3088 |
|
...date precedes bulletin
|
Date: 2023-04-18:
| 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 |
13190 |
6015 |
651 |
458 |
235 |
108 |
19 |
0 |
| OW |
0 |
54 |
149 |
149 |
103 |
87 |
43 |
0 |
| VODI |
0 |
14 |
107 |
125 |
104 |
98 |
93 |
0 |
| ODI |
0 |
2 |
41 |
82 |
98 |
108 |
198 |
0 |
| CDI |
0 |
0 |
38 |
74 |
115 |
240 |
710 |
0 |
| VCDI |
0 |
9 |
23 |
107 |
308 |
1001 |
10408 |
2798 |
|
...date precedes bulletin
|
Date: 2023-04-20:
| 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 |
12916 |
6132 |
915 |
473 |
185 |
65 |
5 |
0 |
| OW |
0 |
70 |
199 |
134 |
107 |
60 |
14 |
0 |
| VODI |
0 |
8 |
96 |
128 |
129 |
119 |
67 |
0 |
| ODI |
0 |
3 |
41 |
95 |
116 |
123 |
165 |
0 |
| CDI |
0 |
1 |
25 |
100 |
209 |
247 |
730 |
0 |
| VCDI |
0 |
8 |
14 |
93 |
285 |
870 |
10072 |
3143 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12916 |
6176 |
990 |
508 |
201 |
74 |
6 |
0 |
| OW |
0 |
26 |
129 |
102 |
95 |
56 |
14 |
0 |
| VODI |
0 |
8 |
95 |
122 |
124 |
114 |
62 |
0 |
| ODI |
0 |
3 |
35 |
102 |
116 |
111 |
164 |
0 |
| CDI |
0 |
1 |
24 |
91 |
194 |
249 |
707 |
0 |
| VCDI |
0 |
8 |
17 |
98 |
301 |
880 |
10100 |
3143 |
|
Date: 2023-04-24:
| 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 |
12556 |
6125 |
1020 |
446 |
343 |
181 |
40 |
0 |
| OW |
0 |
7 |
111 |
120 |
94 |
123 |
48 |
0 |
| VODI |
0 |
5 |
62 |
174 |
132 |
146 |
98 |
0 |
| ODI |
0 |
4 |
27 |
111 |
129 |
174 |
204 |
0 |
| CDI |
0 |
1 |
9 |
113 |
201 |
393 |
735 |
0 |
| VCDI |
0 |
8 |
10 |
186 |
316 |
1175 |
9528 |
3007 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12556 |
6111 |
952 |
468 |
353 |
197 |
49 |
0 |
| OW |
0 |
17 |
150 |
91 |
93 |
102 |
33 |
0 |
| VODI |
0 |
6 |
93 |
147 |
93 |
145 |
102 |
0 |
| ODI |
0 |
5 |
18 |
129 |
120 |
153 |
210 |
0 |
| CDI |
0 |
3 |
13 |
105 |
191 |
370 |
726 |
0 |
| VCDI |
0 |
8 |
13 |
210 |
365 |
1225 |
9533 |
3007 |
|
Date: 2023-04-26:
| 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 |
12284 |
6171 |
1298 |
691 |
245 |
60 |
54 |
0 |
| OW |
0 |
12 |
141 |
148 |
125 |
34 |
45 |
0 |
| VODI |
0 |
6 |
109 |
174 |
149 |
97 |
118 |
0 |
| ODI |
0 |
4 |
49 |
109 |
144 |
126 |
182 |
0 |
| CDI |
0 |
1 |
50 |
124 |
179 |
227 |
796 |
0 |
| VCDI |
0 |
7 |
19 |
267 |
347 |
836 |
9652 |
3082 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12284 |
6140 |
1272 |
676 |
237 |
65 |
66 |
0 |
| OW |
0 |
35 |
120 |
137 |
101 |
32 |
37 |
0 |
| VODI |
0 |
15 |
128 |
143 |
157 |
78 |
111 |
0 |
| ODI |
0 |
3 |
77 |
111 |
123 |
106 |
191 |
0 |
| CDI |
0 |
1 |
59 |
134 |
157 |
239 |
739 |
0 |
| VCDI |
0 |
7 |
10 |
312 |
414 |
860 |
9703 |
3082 |
|
Date: 2023-04-28:
| 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 |
12576 |
6193 |
1216 |
615 |
119 |
37 |
36 |
0 |
| OW |
0 |
53 |
145 |
184 |
60 |
39 |
37 |
0 |
| VODI |
0 |
19 |
122 |
217 |
116 |
65 |
110 |
0 |
| ODI |
0 |
11 |
48 |
131 |
128 |
112 |
152 |
0 |
| CDI |
0 |
2 |
77 |
150 |
142 |
192 |
675 |
0 |
| VCDI |
0 |
7 |
59 |
322 |
501 |
1218 |
9292 |
2984 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12576 |
6118 |
1228 |
619 |
122 |
45 |
46 |
0 |
| OW |
0 |
86 |
125 |
175 |
59 |
41 |
41 |
0 |
| VODI |
0 |
54 |
106 |
201 |
117 |
88 |
102 |
0 |
| ODI |
0 |
11 |
64 |
122 |
87 |
78 |
162 |
0 |
| CDI |
0 |
10 |
80 |
147 |
126 |
175 |
660 |
0 |
| VCDI |
0 |
6 |
64 |
355 |
555 |
1236 |
9291 |
2984 |
|
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