Validation of sea ice concentration
Bulletin date: 2023-08-03
Model vs. observations, sea ice class contingency tables
Date: 2023-07-28:
| 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 |
19699 |
6247 |
1336 |
985 |
415 |
95 |
29 |
0 |
| OW |
0 |
1 |
25 |
196 |
250 |
140 |
21 |
0 |
| VODI |
0 |
0 |
15 |
167 |
348 |
275 |
121 |
0 |
| ODI |
0 |
0 |
9 |
53 |
177 |
275 |
409 |
89 |
| CDI |
0 |
0 |
0 |
22 |
43 |
176 |
2257 |
2442 |
| VCDI |
0 |
0 |
0 |
4 |
16 |
34 |
531 |
1257 |
|
...date precedes bulletin
|
Date: 2023-08-01:
| 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 |
19500 |
6558 |
1682 |
944 |
303 |
73 |
31 |
0 |
| OW |
0 |
0 |
9 |
214 |
204 |
53 |
13 |
0 |
| VODI |
0 |
0 |
9 |
238 |
413 |
229 |
96 |
0 |
| ODI |
0 |
0 |
0 |
52 |
180 |
279 |
223 |
18 |
| CDI |
0 |
0 |
0 |
14 |
44 |
150 |
1712 |
1632 |
| VCDI |
0 |
0 |
0 |
1 |
3 |
15 |
1021 |
2246 |
|
...date precedes bulletin
|
Date: 2023-08-03:
| 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 |
19760 |
6454 |
1635 |
871 |
420 |
80 |
22 |
0 |
| OW |
0 |
0 |
18 |
190 |
271 |
75 |
17 |
0 |
| VODI |
0 |
0 |
8 |
209 |
336 |
262 |
127 |
0 |
| ODI |
0 |
0 |
0 |
37 |
153 |
213 |
256 |
14 |
| CDI |
0 |
0 |
0 |
15 |
41 |
143 |
2005 |
1770 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
12 |
691 |
2054 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19760 |
6454 |
1637 |
896 |
455 |
94 |
28 |
0 |
| OW |
0 |
0 |
15 |
162 |
253 |
74 |
20 |
0 |
| VODI |
0 |
0 |
8 |
208 |
314 |
248 |
128 |
0 |
| ODI |
0 |
0 |
1 |
35 |
148 |
211 |
256 |
0 |
| CDI |
0 |
0 |
0 |
21 |
51 |
145 |
1960 |
1794 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
13 |
726 |
2044 |
|
Date: 2023-08-07:
| 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 |
20349 |
6874 |
1535 |
727 |
76 |
66 |
10 |
0 |
| OW |
0 |
1 |
73 |
296 |
101 |
25 |
6 |
0 |
| VODI |
0 |
0 |
34 |
355 |
301 |
180 |
82 |
0 |
| ODI |
0 |
0 |
1 |
86 |
136 |
231 |
400 |
32 |
| CDI |
0 |
0 |
2 |
10 |
24 |
73 |
1848 |
1597 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2 |
472 |
2154 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20349 |
6868 |
1481 |
757 |
111 |
72 |
10 |
0 |
| OW |
0 |
7 |
89 |
244 |
108 |
44 |
17 |
0 |
| VODI |
0 |
0 |
48 |
304 |
245 |
181 |
80 |
0 |
| ODI |
0 |
0 |
17 |
127 |
104 |
150 |
222 |
0 |
| CDI |
0 |
0 |
10 |
42 |
68 |
124 |
1962 |
1699 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
6 |
527 |
2084 |
|
Date: 2023-08-09:
| 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 |
20453 |
7023 |
1265 |
863 |
218 |
19 |
9 |
0 |
| OW |
0 |
1 |
40 |
210 |
164 |
43 |
11 |
0 |
| VODI |
0 |
0 |
7 |
258 |
358 |
201 |
100 |
0 |
| ODI |
0 |
0 |
0 |
49 |
119 |
175 |
380 |
54 |
| CDI |
0 |
0 |
0 |
9 |
47 |
84 |
1864 |
1557 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
0 |
432 |
2146 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
20453 |
7015 |
1241 |
814 |
243 |
26 |
8 |
0 |
| OW |
0 |
7 |
44 |
222 |
177 |
56 |
16 |
0 |
| VODI |
0 |
2 |
18 |
242 |
261 |
167 |
94 |
0 |
| ODI |
0 |
0 |
8 |
71 |
134 |
139 |
226 |
10 |
| CDI |
0 |
0 |
1 |
40 |
89 |
129 |
2009 |
1704 |
| VCDI |
0 |
0 |
0 |
0 |
2 |
5 |
443 |
2043 |
|
Date: 2023-08-11:
| 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 |
21167 |
6410 |
1193 |
1003 |
186 |
21 |
8 |
0 |
| OW |
0 |
0 |
33 |
273 |
157 |
53 |
18 |
0 |
| VODI |
0 |
0 |
4 |
307 |
254 |
139 |
100 |
0 |
| ODI |
0 |
0 |
0 |
79 |
116 |
189 |
324 |
71 |
| CDI |
0 |
0 |
0 |
14 |
42 |
92 |
1999 |
1606 |
| VCDI |
0 |
0 |
0 |
0 |
1 |
1 |
466 |
1833 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
21167 |
6410 |
1174 |
1008 |
244 |
36 |
9 |
0 |
| OW |
0 |
0 |
37 |
288 |
139 |
61 |
31 |
0 |
| VODI |
0 |
0 |
16 |
226 |
202 |
129 |
140 |
0 |
| ODI |
0 |
0 |
3 |
99 |
82 |
141 |
252 |
0 |
| CDI |
0 |
0 |
0 |
51 |
82 |
117 |
1969 |
1775 |
| VCDI |
0 |
0 |
0 |
4 |
7 |
11 |
514 |
1735 |
|
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