Validation of sea ice concentration
Bulletin date: 2023-09-07
Model vs. observations, sea ice class contingency tables
Date: 2023-09-01:
| 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 |
22911 |
5167 |
1440 |
852 |
282 |
96 |
1 |
0 |
| OW |
0 |
0 |
45 |
153 |
177 |
107 |
7 |
0 |
| VODI |
0 |
0 |
22 |
102 |
237 |
195 |
55 |
0 |
| ODI |
0 |
0 |
4 |
57 |
117 |
380 |
607 |
62 |
| CDI |
0 |
0 |
0 |
14 |
79 |
143 |
2082 |
1205 |
| VCDI |
0 |
0 |
0 |
0 |
7 |
11 |
849 |
693 |
|
...date precedes bulletin
|
Date: 2023-09-05:
| 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 |
23846 |
5017 |
1072 |
970 |
180 |
18 |
0 |
0 |
| OW |
0 |
4 |
24 |
211 |
155 |
28 |
7 |
0 |
| VODI |
0 |
1 |
14 |
166 |
237 |
151 |
104 |
0 |
| ODI |
0 |
0 |
0 |
61 |
180 |
283 |
793 |
130 |
| CDI |
0 |
0 |
0 |
15 |
60 |
165 |
1691 |
1562 |
| VCDI |
0 |
0 |
0 |
0 |
13 |
6 |
494 |
501 |
|
...date precedes bulletin
|
Date: 2023-09-07:
| 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 |
23903 |
4962 |
1203 |
578 |
349 |
119 |
7 |
0 |
| OW |
0 |
2 |
56 |
90 |
214 |
70 |
31 |
0 |
| VODI |
0 |
0 |
23 |
35 |
195 |
200 |
186 |
0 |
| ODI |
0 |
0 |
0 |
18 |
96 |
314 |
893 |
103 |
| CDI |
0 |
0 |
0 |
2 |
7 |
80 |
1353 |
1406 |
| VCDI |
0 |
0 |
0 |
5 |
21 |
46 |
676 |
916 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23903 |
4962 |
1215 |
601 |
401 |
129 |
13 |
0 |
| OW |
0 |
2 |
41 |
67 |
155 |
68 |
57 |
0 |
| VODI |
0 |
0 |
25 |
34 |
196 |
187 |
161 |
0 |
| ODI |
0 |
0 |
1 |
17 |
98 |
303 |
903 |
113 |
| CDI |
0 |
0 |
0 |
4 |
9 |
74 |
1290 |
1382 |
| VCDI |
0 |
0 |
0 |
5 |
23 |
68 |
722 |
930 |
|
Date: 2023-09-11:
| 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 |
23469 |
5351 |
1455 |
621 |
252 |
38 |
1 |
0 |
| OW |
0 |
1 |
91 |
138 |
175 |
45 |
3 |
0 |
| VODI |
0 |
0 |
30 |
153 |
299 |
274 |
22 |
0 |
| ODI |
0 |
0 |
0 |
48 |
180 |
501 |
942 |
0 |
| CDI |
0 |
0 |
0 |
9 |
9 |
87 |
1193 |
1410 |
| VCDI |
0 |
0 |
0 |
5 |
4 |
4 |
548 |
801 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23469 |
5330 |
1377 |
597 |
285 |
60 |
3 |
0 |
| OW |
0 |
18 |
85 |
103 |
126 |
62 |
12 |
0 |
| VODI |
0 |
4 |
91 |
134 |
205 |
140 |
26 |
0 |
| ODI |
0 |
0 |
23 |
106 |
222 |
458 |
439 |
0 |
| CDI |
0 |
0 |
0 |
26 |
74 |
190 |
1320 |
262 |
| VCDI |
0 |
0 |
0 |
8 |
7 |
39 |
909 |
1949 |
|
Date: 2023-09-13:
| 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 |
23685 |
5491 |
1006 |
699 |
185 |
22 |
0 |
0 |
| OW |
0 |
17 |
66 |
165 |
141 |
29 |
0 |
0 |
| VODI |
0 |
0 |
33 |
144 |
333 |
124 |
15 |
0 |
| ODI |
0 |
0 |
1 |
74 |
283 |
538 |
681 |
0 |
| CDI |
0 |
0 |
0 |
7 |
7 |
92 |
1304 |
871 |
| VCDI |
0 |
0 |
0 |
6 |
3 |
17 |
805 |
1315 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23685 |
5418 |
950 |
677 |
209 |
27 |
1 |
0 |
| OW |
0 |
43 |
51 |
140 |
101 |
31 |
11 |
0 |
| VODI |
0 |
37 |
67 |
123 |
238 |
72 |
13 |
0 |
| ODI |
0 |
10 |
37 |
116 |
305 |
341 |
200 |
0 |
| CDI |
0 |
0 |
1 |
32 |
94 |
320 |
1444 |
45 |
| VCDI |
0 |
0 |
0 |
7 |
5 |
31 |
1136 |
2141 |
|
Date: 2023-09-15:
| 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 |
23201 |
5606 |
1088 |
738 |
256 |
50 |
0 |
0 |
| OW |
0 |
6 |
71 |
165 |
149 |
52 |
1 |
0 |
| VODI |
0 |
5 |
23 |
94 |
288 |
165 |
13 |
0 |
| ODI |
0 |
0 |
2 |
69 |
254 |
626 |
547 |
0 |
| CDI |
0 |
0 |
0 |
7 |
37 |
121 |
1361 |
616 |
| VCDI |
0 |
0 |
0 |
5 |
8 |
19 |
909 |
1607 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23201 |
5504 |
1027 |
730 |
296 |
80 |
3 |
0 |
| OW |
0 |
55 |
48 |
106 |
105 |
52 |
8 |
0 |
| VODI |
0 |
46 |
67 |
98 |
206 |
104 |
14 |
0 |
| ODI |
0 |
12 |
37 |
112 |
245 |
265 |
95 |
0 |
| CDI |
0 |
0 |
5 |
23 |
125 |
513 |
1461 |
19 |
| VCDI |
0 |
0 |
0 |
9 |
15 |
19 |
1250 |
2204 |
|
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