Validation of sea ice concentration - American sector
Bulletin date: 2023-12-21
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-12-15:
| 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 |
8829 |
4717 |
234 |
703 |
462 |
33 |
0 |
0 |
| OW |
128 |
691 |
184 |
711 |
493 |
155 |
0 |
0 |
| VODI |
117 |
205 |
112 |
645 |
707 |
225 |
0 |
0 |
| ODI |
6 |
15 |
11 |
230 |
673 |
376 |
0 |
0 |
| CDI |
0 |
6 |
5 |
66 |
413 |
1450 |
5 |
0 |
| VCDI |
0 |
13 |
3 |
26 |
304 |
3553 |
5982 |
28743 |
|
...date precedes bulletin
|
Date: 2023-12-17:
| 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 |
8551 |
4310 |
168 |
422 |
307 |
319 |
0 |
0 |
| OW |
19 |
708 |
153 |
541 |
228 |
272 |
4 |
0 |
| VODI |
7 |
205 |
99 |
661 |
557 |
613 |
11 |
0 |
| ODI |
0 |
23 |
35 |
350 |
639 |
587 |
35 |
0 |
| CDI |
0 |
0 |
0 |
101 |
337 |
1466 |
493 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
163 |
2860 |
5945 |
30033 |
|
...date precedes bulletin
|
Date: 2023-12-19:
| 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 |
7949 |
4568 |
189 |
269 |
197 |
142 |
5 |
0 |
| OW |
4 |
530 |
162 |
427 |
160 |
132 |
27 |
0 |
| VODI |
1 |
85 |
31 |
448 |
543 |
125 |
37 |
0 |
| ODI |
0 |
1 |
0 |
157 |
817 |
289 |
46 |
0 |
| CDI |
0 |
0 |
0 |
21 |
454 |
1597 |
466 |
45 |
| VCDI |
0 |
0 |
0 |
1 |
92 |
2989 |
8441 |
29784 |
|
...date precedes bulletin
|
Date: 2023-12-21:
| 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 |
7538 |
4029 |
134 |
361 |
146 |
129 |
0 |
0 |
| OW |
12 |
593 |
141 |
381 |
216 |
153 |
0 |
0 |
| VODI |
3 |
166 |
43 |
445 |
481 |
213 |
0 |
0 |
| ODI |
0 |
8 |
4 |
155 |
685 |
322 |
10 |
0 |
| CDI |
0 |
0 |
0 |
28 |
697 |
935 |
216 |
8 |
| VCDI |
0 |
0 |
0 |
0 |
176 |
3535 |
9284 |
29984 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
7541 |
3975 |
143 |
384 |
204 |
151 |
0 |
0 |
| OW |
10 |
554 |
132 |
339 |
166 |
114 |
0 |
0 |
| VODI |
2 |
248 |
42 |
465 |
462 |
189 |
0 |
0 |
| ODI |
0 |
18 |
5 |
141 |
649 |
343 |
2 |
0 |
| CDI |
0 |
1 |
0 |
41 |
737 |
893 |
169 |
7 |
| VCDI |
0 |
0 |
0 |
0 |
183 |
3597 |
9339 |
29985 |
|
Date: 2023-12-23:
| 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 |
6930 |
3866 |
99 |
192 |
148 |
18 |
0 |
0 |
| OW |
30 |
540 |
121 |
579 |
228 |
73 |
0 |
0 |
| VODI |
0 |
341 |
72 |
562 |
597 |
112 |
21 |
0 |
| ODI |
0 |
41 |
10 |
215 |
746 |
208 |
44 |
0 |
| CDI |
0 |
0 |
0 |
102 |
741 |
654 |
131 |
9 |
| VCDI |
0 |
0 |
0 |
5 |
268 |
3346 |
7431 |
32751 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6929 |
3785 |
109 |
243 |
185 |
55 |
0 |
0 |
| OW |
31 |
583 |
110 |
489 |
172 |
39 |
0 |
0 |
| VODI |
0 |
317 |
71 |
604 |
588 |
96 |
27 |
0 |
| ODI |
0 |
85 |
12 |
200 |
715 |
234 |
45 |
0 |
| CDI |
0 |
18 |
0 |
112 |
728 |
615 |
111 |
9 |
| VCDI |
0 |
0 |
0 |
7 |
340 |
3372 |
7444 |
32751 |
|
Date: 2023-12-25:
| 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 |
6456 |
3590 |
76 |
105 |
21 |
4 |
0 |
0 |
| OW |
8 |
722 |
169 |
396 |
57 |
50 |
3 |
0 |
| VODI |
0 |
108 |
47 |
1213 |
406 |
71 |
14 |
0 |
| ODI |
0 |
6 |
1 |
191 |
1036 |
199 |
26 |
0 |
| CDI |
0 |
0 |
0 |
19 |
511 |
1477 |
148 |
3 |
| VCDI |
0 |
0 |
0 |
16 |
165 |
3905 |
13160 |
26852 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6457 |
3616 |
88 |
215 |
159 |
90 |
0 |
0 |
| OW |
7 |
393 |
148 |
561 |
124 |
100 |
23 |
0 |
| VODI |
0 |
239 |
38 |
822 |
517 |
220 |
104 |
0 |
| ODI |
0 |
120 |
13 |
217 |
598 |
368 |
106 |
0 |
| CDI |
0 |
55 |
6 |
83 |
505 |
877 |
254 |
3 |
| VCDI |
0 |
3 |
0 |
42 |
293 |
4051 |
12864 |
26852 |
|
Date: 2023-12-27:
| 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 |
6461 |
3379 |
47 |
52 |
10 |
0 |
0 |
0 |
| OW |
8 |
510 |
165 |
225 |
88 |
60 |
1 |
0 |
| VODI |
0 |
289 |
104 |
882 |
550 |
100 |
14 |
0 |
| ODI |
0 |
15 |
3 |
230 |
748 |
221 |
52 |
0 |
| CDI |
0 |
0 |
0 |
43 |
456 |
1109 |
273 |
0 |
| VCDI |
0 |
0 |
0 |
37 |
295 |
4025 |
12310 |
28469 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6462 |
3385 |
53 |
116 |
121 |
59 |
0 |
0 |
| OW |
7 |
334 |
147 |
288 |
200 |
160 |
17 |
0 |
| VODI |
0 |
251 |
86 |
674 |
445 |
223 |
73 |
0 |
| ODI |
0 |
121 |
24 |
195 |
432 |
368 |
164 |
0 |
| CDI |
0 |
94 |
9 |
126 |
568 |
682 |
699 |
24 |
| VCDI |
0 |
8 |
0 |
70 |
381 |
4023 |
11697 |
28445 |
|
Date: 2023-12-29:
| 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 |
6329 |
3360 |
113 |
98 |
1 |
0 |
0 |
0 |
| OW |
1 |
475 |
92 |
258 |
83 |
11 |
0 |
0 |
| VODI |
0 |
179 |
83 |
519 |
601 |
161 |
15 |
0 |
| ODI |
0 |
88 |
30 |
201 |
774 |
255 |
62 |
0 |
| CDI |
0 |
13 |
4 |
51 |
560 |
802 |
248 |
0 |
| VCDI |
0 |
0 |
0 |
30 |
259 |
3799 |
11936 |
29740 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
6329 |
3104 |
95 |
96 |
13 |
7 |
0 |
0 |
| OW |
1 |
467 |
76 |
306 |
216 |
155 |
21 |
0 |
| VODI |
0 |
236 |
80 |
350 |
485 |
239 |
94 |
0 |
| ODI |
0 |
160 |
24 |
245 |
461 |
358 |
112 |
0 |
| CDI |
0 |
106 |
38 |
113 |
556 |
635 |
270 |
3 |
| VCDI |
0 |
42 |
9 |
47 |
547 |
3634 |
11764 |
29737 |
|
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