Validation of sea ice concentration
Bulletin date: 2023-11-23
Model vs. observations, sea ice class contingency tables
Date: 2023-11-17:
| 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 |
15719 |
7022 |
595 |
354 |
232 |
191 |
134 |
3 |
| OW |
0 |
109 |
119 |
58 |
76 |
73 |
42 |
0 |
| VODI |
0 |
36 |
95 |
92 |
99 |
105 |
67 |
0 |
| ODI |
0 |
1 |
40 |
44 |
85 |
116 |
87 |
5 |
| CDI |
0 |
0 |
17 |
40 |
90 |
260 |
315 |
42 |
| VCDI |
0 |
0 |
6 |
9 |
43 |
236 |
5497 |
6005 |
|
...date precedes bulletin
|
Date: 2023-11-21:
| 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 |
15354 |
5948 |
1454 |
763 |
268 |
78 |
90 |
0 |
| OW |
0 |
8 |
80 |
203 |
120 |
45 |
26 |
0 |
| VODI |
0 |
0 |
46 |
143 |
105 |
145 |
62 |
0 |
| ODI |
0 |
0 |
11 |
75 |
80 |
111 |
139 |
0 |
| CDI |
0 |
0 |
7 |
16 |
61 |
222 |
268 |
10 |
| VCDI |
0 |
0 |
4 |
27 |
43 |
427 |
6068 |
5652 |
|
...date precedes bulletin
|
Date: 2023-11-23:
| 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 |
15442 |
6019 |
1555 |
349 |
242 |
223 |
75 |
0 |
| OW |
0 |
23 |
221 |
181 |
114 |
79 |
24 |
0 |
| VODI |
0 |
5 |
108 |
110 |
173 |
130 |
27 |
0 |
| ODI |
0 |
1 |
63 |
62 |
102 |
163 |
62 |
0 |
| CDI |
0 |
0 |
49 |
57 |
91 |
243 |
222 |
37 |
| VCDI |
0 |
0 |
49 |
77 |
123 |
719 |
5933 |
5006 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15442 |
6027 |
1589 |
393 |
257 |
241 |
83 |
0 |
| OW |
0 |
18 |
196 |
146 |
118 |
66 |
16 |
0 |
| VODI |
0 |
2 |
103 |
108 |
164 |
149 |
34 |
0 |
| ODI |
0 |
1 |
64 |
65 |
101 |
170 |
68 |
0 |
| CDI |
0 |
0 |
45 |
45 |
91 |
226 |
230 |
42 |
| VCDI |
0 |
0 |
48 |
79 |
114 |
705 |
5912 |
5001 |
|
Date: 2023-11-27:
| 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 |
15047 |
6795 |
989 |
672 |
198 |
96 |
107 |
0 |
| OW |
0 |
48 |
111 |
234 |
105 |
30 |
21 |
0 |
| VODI |
0 |
29 |
77 |
238 |
178 |
102 |
33 |
0 |
| ODI |
0 |
13 |
30 |
129 |
192 |
193 |
117 |
1 |
| CDI |
0 |
11 |
27 |
129 |
184 |
291 |
496 |
22 |
| VCDI |
0 |
25 |
43 |
114 |
167 |
766 |
6219 |
3880 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15047 |
6668 |
857 |
592 |
227 |
109 |
127 |
0 |
| OW |
0 |
104 |
179 |
208 |
101 |
36 |
20 |
0 |
| VODI |
0 |
47 |
93 |
241 |
170 |
118 |
61 |
0 |
| ODI |
0 |
22 |
34 |
139 |
152 |
147 |
77 |
3 |
| CDI |
0 |
33 |
40 |
112 |
105 |
176 |
334 |
24 |
| VCDI |
0 |
47 |
74 |
224 |
269 |
892 |
6374 |
3876 |
|
Date: 2023-11-29:
| 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 |
15141 |
6475 |
1255 |
366 |
268 |
136 |
124 |
0 |
| OW |
0 |
78 |
245 |
166 |
79 |
25 |
35 |
0 |
| VODI |
0 |
10 |
160 |
196 |
140 |
121 |
61 |
0 |
| ODI |
0 |
5 |
54 |
110 |
149 |
232 |
144 |
3 |
| CDI |
0 |
1 |
39 |
116 |
205 |
285 |
452 |
16 |
| VCDI |
0 |
0 |
102 |
116 |
187 |
512 |
6303 |
4047 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15141 |
6327 |
1133 |
325 |
250 |
131 |
145 |
0 |
| OW |
0 |
194 |
264 |
153 |
94 |
46 |
35 |
0 |
| VODI |
0 |
35 |
194 |
198 |
151 |
156 |
84 |
0 |
| ODI |
0 |
8 |
94 |
120 |
142 |
211 |
108 |
2 |
| CDI |
0 |
5 |
57 |
110 |
140 |
197 |
427 |
16 |
| VCDI |
0 |
0 |
113 |
164 |
251 |
570 |
6320 |
4048 |
|
Date: 2023-12-01:
| 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 |
15119 |
6290 |
942 |
352 |
249 |
258 |
108 |
0 |
| OW |
0 |
106 |
234 |
107 |
93 |
55 |
26 |
0 |
| VODI |
0 |
37 |
200 |
135 |
133 |
128 |
68 |
0 |
| ODI |
0 |
8 |
63 |
82 |
115 |
246 |
103 |
0 |
| CDI |
0 |
0 |
30 |
68 |
172 |
455 |
339 |
16 |
| VCDI |
0 |
0 |
35 |
43 |
121 |
742 |
6736 |
4145 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
15119 |
6158 |
860 |
338 |
262 |
282 |
116 |
0 |
| OW |
0 |
201 |
197 |
96 |
88 |
99 |
44 |
0 |
| VODI |
0 |
79 |
234 |
165 |
174 |
222 |
87 |
0 |
| ODI |
0 |
3 |
82 |
64 |
111 |
269 |
174 |
0 |
| CDI |
0 |
0 |
79 |
60 |
99 |
374 |
532 |
14 |
| VCDI |
0 |
0 |
52 |
64 |
149 |
638 |
6427 |
4147 |
|
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