Validation of sea ice concentration
Bulletin date: 2023-02-23
Model vs. observations, sea ice class contingency tables
Date: 2023-02-17:
| 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 |
14041 |
6772 |
831 |
191 |
64 |
16 |
8 |
0 |
| OW |
0 |
98 |
231 |
147 |
92 |
31 |
1 |
0 |
| VODI |
0 |
40 |
196 |
187 |
152 |
167 |
10 |
0 |
| ODI |
0 |
26 |
85 |
127 |
167 |
188 |
47 |
0 |
| CDI |
0 |
27 |
43 |
103 |
161 |
251 |
226 |
11 |
| VCDI |
0 |
44 |
163 |
319 |
549 |
1410 |
7274 |
3663 |
|
...date precedes bulletin
|
Date: 2023-02-21:
| 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 |
13533 |
6658 |
952 |
359 |
152 |
51 |
5 |
0 |
| OW |
0 |
26 |
141 |
147 |
147 |
56 |
4 |
0 |
| VODI |
0 |
18 |
132 |
179 |
170 |
154 |
15 |
0 |
| ODI |
0 |
14 |
74 |
140 |
158 |
239 |
108 |
0 |
| CDI |
0 |
8 |
53 |
83 |
132 |
546 |
305 |
0 |
| VCDI |
0 |
0 |
64 |
124 |
238 |
1625 |
7939 |
3410 |
|
...date precedes bulletin
|
Date: 2023-02-23:
| 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 |
13572 |
6501 |
960 |
334 |
149 |
50 |
0 |
0 |
| OW |
0 |
42 |
163 |
123 |
84 |
58 |
3 |
0 |
| VODI |
0 |
20 |
129 |
142 |
119 |
162 |
15 |
2 |
| ODI |
0 |
16 |
69 |
106 |
112 |
213 |
49 |
6 |
| CDI |
0 |
18 |
70 |
65 |
117 |
544 |
270 |
37 |
| VCDI |
0 |
0 |
109 |
116 |
213 |
1306 |
7728 |
4367 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13572 |
6502 |
972 |
347 |
159 |
52 |
1 |
0 |
| OW |
0 |
40 |
154 |
126 |
80 |
55 |
0 |
1 |
| VODI |
0 |
21 |
131 |
121 |
116 |
164 |
17 |
1 |
| ODI |
0 |
14 |
68 |
116 |
97 |
180 |
62 |
5 |
| CDI |
0 |
17 |
57 |
62 |
138 |
507 |
264 |
35 |
| VCDI |
0 |
3 |
118 |
114 |
204 |
1375 |
7721 |
4370 |
|
Date: 2023-02-27:
| 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 |
13955 |
6362 |
672 |
584 |
108 |
7 |
0 |
0 |
| OW |
1 |
280 |
99 |
119 |
91 |
11 |
0 |
0 |
| VODI |
0 |
151 |
116 |
156 |
129 |
61 |
10 |
0 |
| ODI |
0 |
100 |
79 |
142 |
171 |
181 |
71 |
0 |
| CDI |
0 |
63 |
43 |
139 |
221 |
346 |
701 |
1 |
| VCDI |
0 |
269 |
146 |
441 |
554 |
1243 |
7227 |
3109 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13942 |
6257 |
623 |
483 |
96 |
9 |
0 |
0 |
| OW |
14 |
209 |
103 |
136 |
76 |
15 |
1 |
0 |
| VODI |
0 |
228 |
103 |
152 |
98 |
50 |
11 |
0 |
| ODI |
0 |
131 |
79 |
135 |
106 |
120 |
68 |
0 |
| CDI |
0 |
104 |
49 |
174 |
258 |
342 |
759 |
1 |
| VCDI |
0 |
296 |
198 |
501 |
640 |
1313 |
7170 |
3109 |
|
Date: 2023-03-01:
| 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 |
13285 |
6223 |
958 |
561 |
342 |
67 |
0 |
0 |
| OW |
4 |
117 |
196 |
74 |
134 |
71 |
2 |
0 |
| VODI |
0 |
184 |
106 |
114 |
129 |
125 |
23 |
0 |
| ODI |
0 |
37 |
75 |
90 |
137 |
193 |
118 |
0 |
| CDI |
0 |
22 |
64 |
73 |
219 |
539 |
609 |
9 |
| VCDI |
0 |
27 |
230 |
248 |
357 |
1400 |
7244 |
3753 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
13274 |
6166 |
972 |
557 |
257 |
61 |
0 |
0 |
| OW |
13 |
103 |
131 |
109 |
163 |
67 |
6 |
0 |
| VODI |
2 |
96 |
104 |
90 |
178 |
166 |
24 |
0 |
| ODI |
0 |
67 |
53 |
62 |
146 |
240 |
132 |
0 |
| CDI |
0 |
46 |
57 |
73 |
166 |
524 |
735 |
6 |
| VCDI |
0 |
132 |
312 |
269 |
408 |
1337 |
7099 |
3756 |
|
Date: 2023-03-03:
| 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 |
12699 |
6743 |
870 |
756 |
103 |
16 |
0 |
0 |
| OW |
0 |
58 |
170 |
184 |
86 |
37 |
2 |
0 |
| VODI |
0 |
53 |
87 |
197 |
123 |
81 |
27 |
0 |
| ODI |
0 |
109 |
41 |
139 |
137 |
110 |
79 |
0 |
| CDI |
0 |
31 |
67 |
159 |
183 |
426 |
544 |
17 |
| VCDI |
0 |
20 |
108 |
245 |
404 |
1321 |
8069 |
3658 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
12699 |
6655 |
871 |
720 |
81 |
9 |
0 |
0 |
| OW |
0 |
97 |
161 |
183 |
98 |
47 |
16 |
0 |
| VODI |
0 |
66 |
102 |
234 |
132 |
78 |
41 |
0 |
| ODI |
0 |
41 |
37 |
149 |
145 |
179 |
126 |
2 |
| CDI |
0 |
66 |
29 |
110 |
168 |
409 |
628 |
32 |
| VCDI |
0 |
89 |
143 |
284 |
412 |
1269 |
7910 |
3641 |
|
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