Table 1. Eigenvalues and proportion of total variance explained by each axis derived from a principal components analysis of climate data for South America.

Axis	Eigenvalue	Proportion (%)	Cumulative proportion
PC1	10.42	54.84	54.84
PC2	3.86	20.30	75.14
PC3	1.71	9.02	84.16
PC4	1.14	6.01	90.17
PC5	0.74	3.92	94.08
PC6	0.49	2.56	96.64
PC7	0.29	1.51	98.16
PC8	0.15	0.77	98.92
PC9	0.11	0.56	99.49
PC10	0.05	0.27	99.76
PC11	0.02	0.08	99.84
PC12	0.01	0.07	99.91
PC13	0.01	0.03	99.94
PC14	0.00	0.02	99.97
PC15	0.00	0.02	99.98
PC16	0.00	0.01	100.00
PC17	0.00	0.00	100.00
PC18	0.00	0.00	100.00
PC19	0.00	0.00	100.00