Validation of sea ice concentration
Bulletin date: 2021-12-02
Model vs. observations, sea ice class contingency tables
Date: 2021-11-26:
| 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 |
14721 |
7070 |
1180 |
563 |
235 |
252 |
112 |
0 |
| OW |
0 |
45 |
122 |
131 |
91 |
132 |
39 |
0 |
| VODI |
0 |
17 |
66 |
78 |
99 |
158 |
117 |
0 |
| ODI |
0 |
3 |
41 |
35 |
74 |
119 |
203 |
3 |
| CDI |
0 |
2 |
9 |
31 |
71 |
135 |
350 |
49 |
| VCDI |
0 |
0 |
11 |
9 |
35 |
171 |
6045 |
5535 |
|
...date precedes bulletin
|
Date: 2021-11-30:
| 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 |
14497 |
6877 |
1209 |
465 |
254 |
201 |
133 |
0 |
| OW |
0 |
35 |
169 |
134 |
75 |
66 |
31 |
0 |
| VODI |
0 |
12 |
104 |
117 |
99 |
119 |
95 |
0 |
| ODI |
0 |
0 |
35 |
74 |
83 |
101 |
166 |
0 |
| CDI |
0 |
0 |
16 |
28 |
59 |
109 |
344 |
66 |
| VCDI |
0 |
0 |
11 |
25 |
43 |
128 |
5645 |
6534 |
|
...date precedes bulletin
|
Date: 2021-12-02:
| 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 |
14512 |
6467 |
1260 |
434 |
284 |
177 |
140 |
0 |
| OW |
0 |
51 |
164 |
127 |
76 |
68 |
42 |
0 |
| VODI |
0 |
30 |
100 |
111 |
108 |
120 |
91 |
0 |
| ODI |
0 |
14 |
58 |
81 |
67 |
111 |
130 |
0 |
| CDI |
0 |
0 |
28 |
70 |
89 |
150 |
392 |
30 |
| VCDI |
0 |
0 |
8 |
25 |
48 |
158 |
5735 |
6603 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14512 |
6473 |
1265 |
453 |
299 |
194 |
138 |
0 |
| OW |
0 |
39 |
158 |
108 |
70 |
56 |
44 |
0 |
| VODI |
0 |
27 |
104 |
108 |
92 |
125 |
79 |
0 |
| ODI |
0 |
22 |
52 |
84 |
75 |
101 |
132 |
0 |
| CDI |
0 |
1 |
32 |
67 |
83 |
141 |
378 |
36 |
| VCDI |
0 |
0 |
7 |
28 |
53 |
167 |
5759 |
6597 |
|
Date: 2021-12-06:
| 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 |
14409 |
6215 |
1640 |
433 |
181 |
188 |
229 |
0 |
| OW |
0 |
10 |
192 |
130 |
51 |
76 |
47 |
0 |
| VODI |
0 |
3 |
94 |
100 |
86 |
97 |
101 |
0 |
| ODI |
0 |
2 |
36 |
50 |
47 |
106 |
205 |
0 |
| CDI |
0 |
0 |
27 |
35 |
51 |
152 |
483 |
50 |
| VCDI |
0 |
1 |
21 |
69 |
77 |
191 |
5783 |
6491 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14409 |
6178 |
1436 |
373 |
181 |
209 |
238 |
0 |
| OW |
0 |
33 |
207 |
98 |
36 |
61 |
46 |
0 |
| VODI |
0 |
15 |
179 |
103 |
59 |
97 |
113 |
0 |
| ODI |
0 |
2 |
89 |
74 |
54 |
67 |
192 |
3 |
| CDI |
0 |
2 |
52 |
73 |
61 |
167 |
467 |
63 |
| VCDI |
0 |
1 |
47 |
96 |
102 |
209 |
5792 |
6475 |
|
Date: 2021-12-08:
| 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 |
14468 |
6243 |
1556 |
397 |
208 |
114 |
206 |
0 |
| OW |
0 |
17 |
191 |
141 |
103 |
65 |
17 |
0 |
| VODI |
0 |
8 |
128 |
127 |
115 |
135 |
44 |
0 |
| ODI |
0 |
9 |
59 |
84 |
92 |
172 |
95 |
0 |
| CDI |
0 |
6 |
23 |
79 |
104 |
215 |
408 |
10 |
| VCDI |
0 |
2 |
58 |
76 |
145 |
356 |
6910 |
4973 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14468 |
6184 |
1331 |
354 |
223 |
134 |
210 |
0 |
| OW |
0 |
48 |
247 |
98 |
71 |
58 |
11 |
0 |
| VODI |
0 |
24 |
197 |
145 |
84 |
129 |
31 |
0 |
| ODI |
0 |
12 |
104 |
102 |
112 |
159 |
108 |
0 |
| CDI |
0 |
9 |
53 |
93 |
98 |
217 |
464 |
17 |
| VCDI |
0 |
8 |
83 |
112 |
179 |
360 |
6856 |
4966 |
|
Date: 2021-12-10:
| 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 |
14572 |
6211 |
1302 |
403 |
209 |
155 |
197 |
0 |
| OW |
0 |
10 |
185 |
132 |
96 |
107 |
26 |
0 |
| VODI |
0 |
11 |
104 |
119 |
130 |
150 |
61 |
0 |
| ODI |
0 |
5 |
45 |
71 |
97 |
144 |
134 |
0 |
| CDI |
0 |
8 |
20 |
77 |
94 |
216 |
454 |
35 |
| VCDI |
0 |
3 |
46 |
62 |
150 |
411 |
6597 |
5310 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
14572 |
6150 |
1081 |
359 |
229 |
187 |
199 |
0 |
| OW |
0 |
62 |
255 |
112 |
66 |
85 |
33 |
0 |
| VODI |
0 |
17 |
184 |
117 |
118 |
149 |
63 |
0 |
| ODI |
0 |
11 |
92 |
95 |
96 |
151 |
181 |
1 |
| CDI |
0 |
5 |
39 |
84 |
104 |
225 |
609 |
36 |
| VCDI |
0 |
3 |
51 |
97 |
163 |
386 |
6384 |
5308 |
|
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