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. 2016 Dec 6;7:13502. doi: 10.1038/ncomms13502

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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The SEA was conducted between the 12 largest volcanic eruptions of the last 1,000 years and the annually resolved δ¹⁸O-shell series. (a) The annually resolved δ¹⁸O-shell series (red line); the triangles indicate the timing of the 12 (black filled triangles) and 30 (open triangles) largest volcanic eruptions, respectively. (b) SEA analysis of the δ¹⁸O-shell series using the 12 largest eruptions. The grey bars indicate the mean δ¹⁸O-shell series anomalies in over the 12 analysis windows. The red lines indicate the 95% significance level derived using a bootstrapping methodology.