Validation of sea ice concentration
Bulletin date: 2023-08-17
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2023-08-15:
| 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 |
22444 |
5868 |
954 |
729 |
126 |
12 |
8 |
0 |
| OW |
0 |
4 |
21 |
276 |
220 |
40 |
13 |
0 |
| VODI |
0 |
0 |
10 |
202 |
176 |
82 |
136 |
0 |
| ODI |
0 |
0 |
0 |
54 |
98 |
301 |
309 |
0 |
| CDI |
0 |
0 |
0 |
21 |
42 |
267 |
2465 |
188 |
| VCDI |
0 |
0 |
0 |
6 |
0 |
32 |
1387 |
1668 |
|
...date precedes bulletin
|
Date: 2023-08-17:
| 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 |
22518 |
5649 |
951 |
814 |
262 |
40 |
10 |
0 |
| OW |
0 |
6 |
37 |
234 |
213 |
72 |
54 |
0 |
| VODI |
0 |
0 |
18 |
120 |
138 |
110 |
163 |
0 |
| ODI |
0 |
0 |
1 |
38 |
89 |
124 |
461 |
11 |
| CDI |
0 |
0 |
0 |
16 |
34 |
193 |
2636 |
276 |
| VCDI |
0 |
0 |
0 |
1 |
2 |
5 |
1148 |
1715 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22518 |
5646 |
956 |
823 |
256 |
39 |
14 |
0 |
| OW |
0 |
9 |
27 |
226 |
222 |
79 |
62 |
0 |
| VODI |
0 |
0 |
22 |
114 |
128 |
105 |
147 |
0 |
| ODI |
0 |
0 |
2 |
42 |
89 |
114 |
426 |
11 |
| CDI |
0 |
0 |
0 |
17 |
42 |
203 |
2664 |
258 |
| VCDI |
0 |
0 |
0 |
1 |
1 |
4 |
1159 |
1733 |
|
Date: 2023-08-21:
| 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 |
22338 |
5562 |
1721 |
639 |
165 |
44 |
3 |
0 |
| OW |
0 |
0 |
78 |
154 |
121 |
71 |
7 |
0 |
| VODI |
0 |
0 |
27 |
133 |
162 |
231 |
95 |
0 |
| ODI |
0 |
0 |
3 |
40 |
118 |
238 |
564 |
130 |
| CDI |
0 |
0 |
0 |
24 |
51 |
110 |
1848 |
625 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2 |
1073 |
1782 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22338 |
5562 |
1662 |
606 |
184 |
69 |
4 |
0 |
| OW |
0 |
0 |
123 |
151 |
103 |
113 |
24 |
0 |
| VODI |
0 |
0 |
30 |
125 |
118 |
158 |
86 |
0 |
| ODI |
0 |
0 |
14 |
76 |
112 |
170 |
241 |
168 |
| CDI |
0 |
0 |
0 |
32 |
100 |
182 |
2532 |
1128 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
4 |
703 |
1241 |
|
Date: 2023-08-23:
| 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 |
22570 |
5588 |
1296 |
902 |
202 |
53 |
6 |
0 |
| OW |
0 |
1 |
69 |
191 |
112 |
52 |
16 |
0 |
| VODI |
0 |
0 |
23 |
129 |
187 |
174 |
108 |
1 |
| ODI |
0 |
0 |
3 |
63 |
127 |
189 |
496 |
62 |
| CDI |
0 |
0 |
0 |
29 |
75 |
113 |
2068 |
700 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
7 |
959 |
1588 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22570 |
5581 |
1282 |
826 |
202 |
80 |
7 |
0 |
| OW |
0 |
7 |
61 |
205 |
107 |
73 |
30 |
0 |
| VODI |
0 |
1 |
32 |
146 |
150 |
112 |
95 |
0 |
| ODI |
0 |
0 |
16 |
105 |
137 |
165 |
257 |
144 |
| CDI |
0 |
0 |
0 |
32 |
107 |
154 |
2997 |
1562 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
4 |
267 |
645 |
|
Date: 2023-08-25:
| 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 |
22635 |
5620 |
1249 |
842 |
233 |
68 |
9 |
0 |
| OW |
0 |
8 |
40 |
194 |
109 |
83 |
19 |
0 |
| VODI |
0 |
0 |
24 |
143 |
161 |
187 |
92 |
0 |
| ODI |
0 |
0 |
4 |
66 |
130 |
189 |
406 |
65 |
| CDI |
0 |
0 |
0 |
31 |
90 |
184 |
2333 |
618 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
13 |
862 |
1452 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
22635 |
5597 |
1216 |
763 |
230 |
90 |
16 |
0 |
| OW |
0 |
22 |
40 |
187 |
92 |
89 |
13 |
0 |
| VODI |
0 |
7 |
35 |
135 |
135 |
110 |
73 |
0 |
| ODI |
0 |
2 |
15 |
104 |
128 |
144 |
173 |
198 |
| CDI |
0 |
0 |
11 |
87 |
138 |
289 |
3222 |
1509 |
| VCDI |
0 |
0 |
0 |
0 |
0 |
2 |
224 |
428 |
|
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