Validation of sea ice concentration
Bulletin date: 2023-03-23
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2023-03-21:
| 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 |
12296 |
6205 |
845 |
501 |
261 |
129 |
6 |
0 |
| OW |
0 |
9 |
65 |
103 |
134 |
100 |
17 |
0 |
| VODI |
0 |
12 |
24 |
76 |
110 |
192 |
53 |
8 |
| ODI |
0 |
2 |
17 |
40 |
54 |
230 |
81 |
18 |
| CDI |
0 |
0 |
17 |
49 |
61 |
421 |
247 |
45 |
| VCDI |
0 |
0 |
23 |
136 |
106 |
605 |
6665 |
8196 |
|
...date precedes bulletin
|
Date: 2023-03-23:
| 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 |
11920 |
6099 |
1122 |
532 |
269 |
160 |
28 |
0 |
| OW |
0 |
18 |
80 |
74 |
101 |
120 |
42 |
0 |
| VODI |
0 |
14 |
42 |
63 |
109 |
172 |
81 |
8 |
| ODI |
0 |
1 |
36 |
42 |
56 |
147 |
146 |
17 |
| CDI |
0 |
0 |
41 |
54 |
77 |
215 |
338 |
29 |
| VCDI |
0 |
0 |
28 |
109 |
108 |
386 |
8698 |
6577 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11920 |
6101 |
1122 |
539 |
270 |
175 |
28 |
0 |
| OW |
0 |
19 |
80 |
58 |
99 |
112 |
45 |
0 |
| VODI |
0 |
11 |
45 |
69 |
109 |
158 |
85 |
14 |
| ODI |
0 |
1 |
33 |
46 |
61 |
153 |
137 |
14 |
| CDI |
0 |
0 |
34 |
51 |
67 |
217 |
325 |
26 |
| VCDI |
0 |
0 |
35 |
111 |
114 |
385 |
8713 |
6577 |
|
Date: 2023-03-27:
| 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 |
11668 |
6040 |
1280 |
461 |
251 |
143 |
74 |
0 |
| OW |
0 |
2 |
79 |
79 |
102 |
96 |
68 |
0 |
| VODI |
0 |
0 |
51 |
60 |
118 |
137 |
113 |
0 |
| ODI |
0 |
0 |
11 |
40 |
88 |
133 |
208 |
0 |
| CDI |
0 |
0 |
13 |
42 |
99 |
340 |
619 |
2 |
| VCDI |
0 |
0 |
1 |
11 |
51 |
369 |
9298 |
6012 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11668 |
6023 |
1224 |
436 |
262 |
161 |
115 |
0 |
| OW |
0 |
17 |
87 |
87 |
80 |
95 |
78 |
0 |
| VODI |
0 |
2 |
65 |
52 |
102 |
116 |
143 |
0 |
| ODI |
0 |
0 |
37 |
44 |
79 |
110 |
197 |
0 |
| CDI |
0 |
0 |
20 |
61 |
95 |
215 |
499 |
5 |
| VCDI |
0 |
0 |
2 |
13 |
91 |
521 |
9348 |
6009 |
|
Date: 2023-03-29:
| 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 |
11723 |
6022 |
1207 |
443 |
274 |
131 |
77 |
0 |
| OW |
0 |
1 |
102 |
99 |
104 |
78 |
59 |
0 |
| VODI |
0 |
1 |
50 |
64 |
104 |
140 |
103 |
0 |
| ODI |
0 |
0 |
15 |
37 |
87 |
133 |
161 |
0 |
| CDI |
0 |
0 |
6 |
49 |
139 |
346 |
389 |
0 |
| VCDI |
0 |
9 |
1 |
71 |
346 |
1047 |
11438 |
3106 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11723 |
5988 |
1111 |
426 |
280 |
158 |
109 |
0 |
| OW |
0 |
21 |
117 |
66 |
94 |
76 |
79 |
0 |
| VODI |
0 |
13 |
70 |
65 |
87 |
128 |
127 |
0 |
| ODI |
0 |
2 |
44 |
49 |
85 |
129 |
170 |
0 |
| CDI |
0 |
0 |
32 |
89 |
159 |
295 |
434 |
0 |
| VCDI |
0 |
9 |
7 |
68 |
349 |
1089 |
11308 |
3106 |
|
Date: 2023-03-31:
| 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 |
11961 |
5862 |
1227 |
441 |
209 |
149 |
20 |
0 |
| OW |
0 |
4 |
103 |
120 |
93 |
76 |
47 |
0 |
| VODI |
0 |
0 |
57 |
95 |
117 |
117 |
110 |
0 |
| ODI |
0 |
0 |
16 |
76 |
135 |
164 |
152 |
0 |
| CDI |
0 |
1 |
3 |
75 |
179 |
413 |
385 |
0 |
| VCDI |
0 |
8 |
2 |
99 |
316 |
977 |
11225 |
3128 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
11961 |
5825 |
1138 |
407 |
207 |
168 |
36 |
0 |
| OW |
0 |
18 |
105 |
98 |
101 |
78 |
77 |
0 |
| VODI |
0 |
15 |
75 |
90 |
100 |
119 |
107 |
0 |
| ODI |
0 |
7 |
49 |
61 |
112 |
173 |
158 |
0 |
| CDI |
0 |
1 |
34 |
92 |
138 |
344 |
399 |
0 |
| VCDI |
0 |
9 |
7 |
158 |
391 |
1014 |
11162 |
3128 |
|
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