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. 2002 Aug 12;99(17):11235–11240. doi: 10.1073/pnas.172700199

Fig 2.

Fig 2.

Estimated wet atmospheric deposition of base ions measured as the (standardized) composite variable PC2 derived from PCA (see Table 1) on mean deposition of focal ions for the years 1984–1999. Map derived from interpolated point values of PCA scores for each NADP National Trend Network site.

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