Validation of sea ice concentration
Bulletin date: 2023-07-13
Model vs. observations, sea ice class contingency tables
Date: 2023-07-07:
| 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 |
18521 |
5736 |
1861 |
1067 |
127 |
81 |
95 |
0 |
| OW |
0 |
5 |
57 |
458 |
127 |
75 |
70 |
0 |
| VODI |
0 |
0 |
21 |
540 |
260 |
152 |
111 |
0 |
| ODI |
0 |
0 |
8 |
146 |
227 |
269 |
288 |
0 |
| CDI |
0 |
0 |
1 |
164 |
204 |
369 |
1789 |
30 |
| VCDI |
0 |
0 |
1 |
21 |
39 |
151 |
2307 |
2781 |
|
...date precedes bulletin
|
Date: 2023-07-11:
| 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 |
18900 |
6305 |
1374 |
1218 |
175 |
53 |
113 |
0 |
| OW |
0 |
3 |
59 |
269 |
105 |
41 |
45 |
0 |
| VODI |
0 |
0 |
32 |
321 |
274 |
226 |
57 |
0 |
| ODI |
0 |
0 |
10 |
144 |
329 |
535 |
171 |
0 |
| CDI |
0 |
0 |
3 |
95 |
128 |
445 |
1950 |
1397 |
| VCDI |
0 |
0 |
2 |
10 |
36 |
206 |
2095 |
1033 |
|
...date precedes bulletin
|
Date: 2023-07-13:
| 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 |
19059 |
6686 |
1106 |
1026 |
252 |
57 |
87 |
0 |
| OW |
0 |
20 |
67 |
228 |
169 |
57 |
17 |
0 |
| VODI |
0 |
8 |
48 |
210 |
346 |
255 |
53 |
0 |
| ODI |
0 |
0 |
15 |
97 |
296 |
409 |
200 |
0 |
| CDI |
0 |
0 |
1 |
67 |
149 |
403 |
1934 |
1344 |
| VCDI |
0 |
0 |
0 |
10 |
34 |
255 |
2146 |
1048 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19059 |
6688 |
1119 |
1055 |
274 |
71 |
93 |
0 |
| OW |
0 |
17 |
49 |
199 |
154 |
57 |
14 |
0 |
| VODI |
0 |
9 |
49 |
200 |
322 |
270 |
57 |
0 |
| ODI |
0 |
0 |
18 |
97 |
300 |
357 |
162 |
0 |
| CDI |
0 |
0 |
2 |
79 |
163 |
439 |
1979 |
1255 |
| VCDI |
0 |
0 |
0 |
8 |
33 |
242 |
2132 |
1137 |
|
Date: 2023-07-17:
| 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 |
19378 |
6521 |
1526 |
817 |
160 |
42 |
78 |
0 |
| OW |
0 |
2 |
72 |
189 |
63 |
54 |
18 |
0 |
| VODI |
0 |
0 |
45 |
357 |
267 |
115 |
54 |
0 |
| ODI |
0 |
0 |
12 |
193 |
288 |
284 |
270 |
0 |
| CDI |
0 |
0 |
4 |
51 |
102 |
290 |
2118 |
2108 |
| VCDI |
0 |
0 |
1 |
16 |
12 |
24 |
1072 |
1556 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19378 |
6491 |
1466 |
874 |
190 |
70 |
82 |
0 |
| OW |
0 |
25 |
80 |
189 |
105 |
80 |
31 |
0 |
| VODI |
0 |
7 |
61 |
308 |
245 |
148 |
92 |
0 |
| ODI |
0 |
0 |
28 |
132 |
185 |
171 |
274 |
0 |
| CDI |
0 |
0 |
24 |
96 |
145 |
290 |
1686 |
1663 |
| VCDI |
0 |
0 |
1 |
24 |
22 |
50 |
1445 |
2001 |
|
Date: 2023-07-19:
| 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 |
19517 |
6774 |
1021 |
971 |
218 |
60 |
89 |
0 |
| OW |
0 |
6 |
30 |
187 |
134 |
34 |
21 |
0 |
| VODI |
0 |
2 |
9 |
253 |
392 |
154 |
62 |
0 |
| ODI |
0 |
0 |
0 |
81 |
215 |
295 |
226 |
2 |
| CDI |
0 |
0 |
0 |
40 |
99 |
410 |
2277 |
2020 |
| VCDI |
0 |
0 |
0 |
6 |
21 |
40 |
1202 |
1291 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19517 |
6746 |
954 |
988 |
280 |
77 |
91 |
0 |
| OW |
0 |
26 |
48 |
179 |
188 |
50 |
34 |
0 |
| VODI |
0 |
10 |
38 |
197 |
275 |
177 |
109 |
0 |
| ODI |
0 |
0 |
15 |
91 |
175 |
212 |
236 |
0 |
| CDI |
0 |
0 |
5 |
75 |
131 |
383 |
1808 |
1605 |
| VCDI |
0 |
0 |
0 |
8 |
30 |
94 |
1599 |
1708 |
|
Date: 2023-07-21:
| 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 |
19385 |
6729 |
1305 |
861 |
275 |
74 |
64 |
0 |
| OW |
0 |
2 |
64 |
150 |
165 |
55 |
17 |
0 |
| VODI |
0 |
0 |
28 |
233 |
372 |
184 |
62 |
0 |
| ODI |
0 |
0 |
6 |
70 |
208 |
267 |
250 |
0 |
| CDI |
0 |
0 |
1 |
59 |
104 |
396 |
2553 |
1887 |
| VCDI |
0 |
0 |
0 |
13 |
16 |
58 |
1224 |
1022 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19385 |
6704 |
1239 |
871 |
354 |
107 |
67 |
0 |
| OW |
0 |
22 |
65 |
147 |
195 |
81 |
30 |
0 |
| VODI |
0 |
5 |
53 |
164 |
259 |
190 |
117 |
0 |
| ODI |
0 |
0 |
31 |
75 |
154 |
173 |
265 |
0 |
| CDI |
0 |
0 |
16 |
111 |
147 |
370 |
1829 |
1544 |
| VCDI |
0 |
0 |
0 |
18 |
31 |
113 |
1862 |
1365 |
|
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