Validation of sea ice concentration
Bulletin date: 2023-09-14
Model vs. observations, sea ice class contingency tables
Date: 2023-09-08:
| 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 |
23677 |
5349 |
1097 |
784 |
210 |
12 |
0 |
0 |
| OW |
0 |
3 |
47 |
185 |
183 |
33 |
14 |
0 |
| VODI |
0 |
0 |
24 |
108 |
219 |
152 |
115 |
0 |
| ODI |
0 |
0 |
0 |
30 |
148 |
422 |
847 |
0 |
| CDI |
0 |
0 |
0 |
4 |
21 |
83 |
1706 |
931 |
| VCDI |
0 |
0 |
0 |
4 |
20 |
61 |
631 |
1039 |
|
...date precedes bulletin
|
Date: 2023-09-12:
| 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 |
23475 |
5580 |
1208 |
646 |
253 |
22 |
0 |
0 |
| OW |
0 |
6 |
62 |
138 |
152 |
29 |
3 |
0 |
| VODI |
0 |
0 |
41 |
180 |
290 |
184 |
17 |
0 |
| ODI |
0 |
0 |
1 |
78 |
186 |
565 |
784 |
0 |
| CDI |
0 |
0 |
0 |
7 |
9 |
89 |
1267 |
961 |
| VCDI |
0 |
0 |
0 |
5 |
5 |
16 |
777 |
1123 |
|
...date precedes bulletin
|
Date: 2023-09-14:
| 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 |
23290 |
5950 |
774 |
787 |
181 |
14 |
0 |
0 |
| OW |
0 |
21 |
59 |
221 |
96 |
34 |
0 |
0 |
| VODI |
0 |
10 |
20 |
162 |
286 |
132 |
14 |
0 |
| ODI |
0 |
0 |
0 |
84 |
277 |
531 |
643 |
0 |
| CDI |
0 |
0 |
0 |
11 |
16 |
97 |
1316 |
776 |
| VCDI |
0 |
0 |
0 |
6 |
6 |
15 |
810 |
1520 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23290 |
5955 |
787 |
832 |
201 |
25 |
0 |
0 |
| OW |
0 |
18 |
47 |
178 |
90 |
32 |
0 |
0 |
| VODI |
0 |
8 |
18 |
160 |
258 |
143 |
21 |
0 |
| ODI |
0 |
0 |
1 |
84 |
281 |
492 |
691 |
0 |
| CDI |
0 |
0 |
0 |
6 |
25 |
117 |
1303 |
831 |
| VCDI |
0 |
0 |
0 |
11 |
7 |
14 |
768 |
1465 |
|
Date: 2023-09-18:
| 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 |
23682 |
5191 |
860 |
905 |
194 |
25 |
2 |
0 |
| OW |
0 |
1 |
23 |
178 |
73 |
16 |
0 |
0 |
| VODI |
0 |
0 |
18 |
192 |
172 |
52 |
4 |
0 |
| ODI |
0 |
0 |
1 |
121 |
363 |
254 |
66 |
0 |
| CDI |
0 |
0 |
0 |
80 |
138 |
456 |
1647 |
860 |
| VCDI |
0 |
0 |
0 |
2 |
19 |
15 |
1302 |
1247 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23682 |
5140 |
828 |
984 |
254 |
42 |
1 |
0 |
| OW |
0 |
39 |
39 |
143 |
85 |
18 |
1 |
0 |
| VODI |
0 |
13 |
34 |
167 |
222 |
80 |
4 |
0 |
| ODI |
0 |
0 |
1 |
125 |
260 |
390 |
318 |
0 |
| CDI |
0 |
0 |
0 |
58 |
112 |
273 |
1590 |
334 |
| VCDI |
0 |
0 |
0 |
1 |
26 |
15 |
1107 |
1773 |
|
Date: 2023-09-20:
| 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 |
23184 |
5561 |
948 |
753 |
226 |
64 |
0 |
0 |
| OW |
0 |
0 |
37 |
122 |
104 |
58 |
1 |
0 |
| VODI |
0 |
0 |
15 |
90 |
194 |
122 |
7 |
0 |
| ODI |
0 |
0 |
4 |
46 |
186 |
345 |
61 |
0 |
| CDI |
0 |
0 |
0 |
13 |
92 |
670 |
1609 |
520 |
| VCDI |
0 |
0 |
0 |
0 |
23 |
11 |
1453 |
1640 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23184 |
5502 |
917 |
791 |
290 |
111 |
0 |
0 |
| OW |
0 |
37 |
46 |
81 |
111 |
59 |
0 |
0 |
| VODI |
0 |
22 |
39 |
106 |
153 |
174 |
5 |
0 |
| ODI |
0 |
0 |
2 |
34 |
184 |
395 |
269 |
0 |
| CDI |
0 |
0 |
0 |
7 |
66 |
521 |
1728 |
185 |
| VCDI |
0 |
0 |
0 |
5 |
21 |
10 |
1129 |
1975 |
|
Date: 2023-09-22:
| 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 |
23086 |
5459 |
1029 |
697 |
275 |
76 |
5 |
0 |
| OW |
0 |
1 |
33 |
107 |
113 |
58 |
5 |
0 |
| VODI |
0 |
0 |
24 |
80 |
192 |
123 |
7 |
0 |
| ODI |
0 |
0 |
5 |
32 |
164 |
350 |
51 |
0 |
| CDI |
0 |
0 |
1 |
11 |
115 |
603 |
1548 |
14 |
| VCDI |
0 |
0 |
0 |
4 |
30 |
13 |
1695 |
2153 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
23086 |
5405 |
1005 |
717 |
342 |
132 |
4 |
0 |
| OW |
0 |
31 |
30 |
72 |
121 |
67 |
7 |
0 |
| VODI |
0 |
24 |
48 |
89 |
146 |
132 |
8 |
0 |
| ODI |
0 |
0 |
6 |
41 |
165 |
345 |
114 |
0 |
| CDI |
0 |
0 |
3 |
5 |
80 |
534 |
1838 |
34 |
| VCDI |
0 |
0 |
0 |
7 |
35 |
13 |
1340 |
2133 |
|
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