DOI: 10.1029/2004jd005420
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Abstract: An ice core from Nevado Illimani in the eastern Bolivian Altiplano was used to establish proxy data for past climate conditions. For this purpose a principal component analysis (PCA) was performed on the records of ionic species of the upper 59.2 m (time period 1887 ± 6 to 1999 A.D.). The first principal component (PC1) shows high loadings of mainly dust‐related ions. This signal is inversely correlated on a monthly basis with precipitation on the Bolivian Altiplano. Maxima in the PC1 time series correspond to…

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