Validation of sea ice concentration
Bulletin date: 2023-03-09
Model vs. observations, sea ice class contingency tables
Date: 2023-03-03:
| 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 |
12699 |
6743 |
870 |
756 |
103 |
16 |
0 |
0 |
| OW |
0 |
58 |
170 |
184 |
86 |
37 |
2 |
0 |
| VODI |
0 |
53 |
87 |
197 |
123 |
81 |
27 |
0 |
| ODI |
0 |
109 |
41 |
139 |
137 |
110 |
79 |
0 |
| CDI |
0 |
31 |
67 |
159 |
183 |
426 |
544 |
17 |
| VCDI |
0 |
20 |
108 |
245 |
404 |
1321 |
8069 |
3658 |
|
...date precedes bulletin
|
Date: 2023-03-07:
| 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 |
12582 |
6554 |
683 |
663 |
135 |
32 |
0 |
0 |
| OW |
0 |
52 |
116 |
190 |
104 |
44 |
2 |
0 |
| VODI |
0 |
18 |
62 |
228 |
136 |
97 |
14 |
0 |
| ODI |
0 |
4 |
18 |
87 |
145 |
138 |
73 |
0 |
| CDI |
0 |
4 |
18 |
66 |
157 |
353 |
390 |
14 |
| VCDI |
0 |
0 |
41 |
119 |
224 |
965 |
8609 |
5022 |
|
...date precedes bulletin
|
Date: 2023-03-09:
| 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 |
12339 |
6239 |
1003 |
579 |
265 |
48 |
0 |
0 |
| OW |
0 |
15 |
87 |
171 |
201 |
80 |
1 |
0 |
| VODI |
0 |
2 |
52 |
118 |
201 |
150 |
14 |
0 |
| ODI |
0 |
1 |
14 |
74 |
133 |
198 |
80 |
0 |
| CDI |
0 |
0 |
7 |
51 |
117 |
378 |
299 |
46 |
| VCDI |
0 |
0 |
68 |
140 |
245 |
1159 |
9299 |
4285 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12339 |
6235 |
1012 |
587 |
294 |
48 |
0 |
0 |
| OW |
0 |
19 |
70 |
156 |
157 |
74 |
1 |
0 |
| VODI |
0 |
3 |
58 |
116 |
201 |
149 |
23 |
0 |
| ODI |
0 |
0 |
15 |
78 |
140 |
202 |
74 |
0 |
| CDI |
0 |
0 |
8 |
55 |
128 |
377 |
292 |
41 |
| VCDI |
0 |
0 |
68 |
141 |
242 |
1163 |
9303 |
4290 |
|
Date: 2023-03-13:
| 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 |
12128 |
6498 |
1252 |
420 |
211 |
46 |
8 |
0 |
| OW |
0 |
40 |
135 |
119 |
122 |
51 |
29 |
0 |
| VODI |
0 |
39 |
92 |
129 |
158 |
101 |
47 |
0 |
| ODI |
0 |
15 |
58 |
81 |
104 |
145 |
123 |
0 |
| CDI |
0 |
10 |
49 |
45 |
89 |
248 |
376 |
92 |
| VCDI |
0 |
8 |
103 |
137 |
301 |
778 |
7570 |
6202 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12128 |
6457 |
1180 |
386 |
207 |
49 |
16 |
0 |
| OW |
0 |
59 |
146 |
110 |
95 |
47 |
21 |
0 |
| VODI |
0 |
35 |
161 |
124 |
141 |
79 |
63 |
0 |
| ODI |
0 |
16 |
62 |
105 |
130 |
136 |
130 |
0 |
| CDI |
0 |
20 |
41 |
73 |
94 |
240 |
322 |
85 |
| VCDI |
0 |
23 |
99 |
133 |
318 |
818 |
7601 |
6209 |
|
Date: 2023-03-15:
| 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 |
12077 |
6349 |
1229 |
589 |
168 |
60 |
4 |
0 |
| OW |
0 |
33 |
131 |
128 |
102 |
54 |
9 |
0 |
| VODI |
0 |
32 |
84 |
149 |
181 |
113 |
18 |
0 |
| ODI |
0 |
20 |
36 |
98 |
137 |
220 |
101 |
0 |
| CDI |
0 |
23 |
24 |
46 |
171 |
314 |
372 |
9 |
| VCDI |
0 |
34 |
100 |
174 |
320 |
859 |
8844 |
4747 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12077 |
6380 |
1156 |
529 |
180 |
71 |
12 |
0 |
| OW |
0 |
45 |
175 |
138 |
82 |
53 |
10 |
0 |
| VODI |
0 |
26 |
136 |
184 |
169 |
152 |
49 |
0 |
| ODI |
0 |
18 |
54 |
120 |
154 |
213 |
150 |
2 |
| CDI |
0 |
13 |
33 |
74 |
157 |
302 |
320 |
9 |
| VCDI |
0 |
9 |
50 |
139 |
337 |
829 |
8807 |
4745 |
|
Date: 2023-03-17:
| 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 |
12178 |
6197 |
998 |
593 |
218 |
115 |
7 |
0 |
| OW |
0 |
27 |
98 |
126 |
113 |
100 |
19 |
0 |
| VODI |
0 |
11 |
48 |
123 |
127 |
178 |
54 |
0 |
| ODI |
0 |
6 |
27 |
79 |
108 |
256 |
122 |
0 |
| CDI |
0 |
3 |
19 |
70 |
82 |
394 |
361 |
14 |
| VCDI |
0 |
1 |
43 |
126 |
136 |
688 |
8069 |
6225 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12178 |
6192 |
986 |
593 |
221 |
143 |
17 |
0 |
| OW |
0 |
40 |
101 |
134 |
119 |
91 |
41 |
0 |
| VODI |
0 |
13 |
68 |
172 |
150 |
222 |
118 |
0 |
| ODI |
0 |
0 |
39 |
79 |
101 |
254 |
209 |
3 |
| CDI |
0 |
0 |
20 |
71 |
93 |
346 |
490 |
17 |
| VCDI |
0 |
0 |
19 |
68 |
100 |
675 |
7757 |
6219 |
|
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