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Figure 1

From: Volcanic dust veils from sixth century tree-ring isotopes linked to reduced irradiance, primary production and human health

Figure 1

Sampling sites. Carbon isotope data of this study was collected from (a) upland and (b) riparian settings where the subfossil specimens are preserved in the lacustrine sediment and subaerially, respectively. Map showing the sampling sites for this study (star) (c). Photos by Hannu Herva (a) and Samuli Helama (b). The map was created by OriginPro 2017 SR1 software (http://www.originlab.com/).

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