Table 1: Examples of cyclic variation in meteorological and proxy weather records
Southern oscillation |
3-3.8 |
6 |
10-12 |
|
|
|
|
|
|
|
|
Central England temperature |
3.1 |
|
|
14.5 |
23 |
|
76 |
|
|
|
|
South African rainfall |
3.5 |
|
10-12 |
18 |
21 |
|
|
|
|
|
|
South American rainfall |
3.8 |
7 |
|
|
20 |
|
|
|
|
|
|
Extreme 1 hr rainfall (UK) |
|
7.2 |
10.8 |
|
20 |
50 |
|
|
|
|
|
US east coast temperature |
|
9 |
|
|
20 |
|
|
|
|
|
|
North Atlantic pressure |
|
7-9 |
|
14 |
|
|
50-90 |
|
|
|
|
Atlantic hurricanes |
|
9.3 |
11 |
15 |
22 |
52 |
|
|
|
|
|
Beijing rainfall |
|
9.9 |
|
18.6 |
|
56 |
84 |
126 |
|
|
|
US rainfall |
|
|
11 |
18.6 |
|
|
|
|
|
|
|
East African Lakes |
|
|
11 |
|
|
|
|
|
|
|
|
Nile Floods |
|
|
|
18.4 |
|
53 |
77-88 |
|
|
|
|
Global air temperature |
|
|
|
|
22 |
|
65-70 |
|
|
|
|
Galapagos corals |
3 |
6-8 |
11 |
17 |
22 |
34 |
|
|
|
|
|
Oman speleothem |
3 |
7.5 |
|
|
24 |
|
87 |
134 |
205 |
779 |
|
Chinese speleothem |
3.3 |
5-6 |
10-12 |
14-18 |
|
|
|
133 |
194 |
|
|
Zimbabwe tree rings |
3.4 |
|
9-10 |
|
20 |
35-44 |
70 |
130 |
|
|
|
Geological sediments |
|
5.6 |
11 |
|
22 |
|
90 |
|
200 |
|
|
Greenland ice cores |
|
6.3 |
11 |
|
20-22 |
|
90 |
|
200 |
|
1470 |
Fennoscandian tree rings |
|
|
11 |
|
|
31-34 |
86-100 |
|
|
|
|
US drought index (tree rings) |
|
|
|
18.6 |
22 |
|
90 |
|
|
|
|
Finnish tree rings |
|
|
|
|
23 |
30 |
90 |
|
|
|
|
Irish speleothem |
|
|
|
|
|
|
78 |
169 |
|
625 |
|
Bristlecone pine tree rings |
|
|
|
|
|
|
114 |
|
208 |
667 |
1400 |
Ocean sediments |
|
|
|
|
|
|
|
|
|
550 |
1500 |
Table constructed based on data from; Alexander, W. (2007), Burroughs, W.J. (2003), Mason P.J. (1998), Mason P. J. (2006a), Ruzamaikin A. et al. (2006) and the Kafue Gorge Lower Hydroelectric Project, Climate Change Impact Draft Report (2009).