Table 1 

Eigenvalues of the principal component (PC) analysis for the four data sets, given as percent of the total variance (rounded off to the nearest whole percentage point). Note that the first component captures the lion's share of the variance, and that the second component is also quite sizable. 

Data set 
Egv 1 
Egv 2 
Egv 3 
Egv4 
Egv5 
Egv6 
Egv7 
Egv8 
Egv9 


Furs 
61% 
13% 
9% 
6% 
5% 
4% 
1% 
1% 
 
Furs + NAO 
55% 
12% 
10% 
7% 
5% 
5% 
3% 
2% 
1% 
Furs + ENSO 
54% 
14% 
9% 
7% 
5% 
5% 
3% 
2% 
1% 
Furs + temp 
56% 
12% 
11% 
7% 
5% 
4% 
3% 
2% 
1% 


Loeuille and Ghil BMC Ecology 2004 4:6 doi:10.1186/1472678546 