This repository contains all the tree-ring and historical archives used by Guillet et al. (2020) to assess the climatic impacts of the 1108-1110 CE volcanic eruptions For more information, we refer the user to the readme file entitled "Guillet_et_al_SciReports2020_Readme.txt" We note that investigations of European historical archives are still carried ongoing. The file entitled "Guillet_et_al_SciReports2020_Supp_Info_Table_S1_S2_Historical_Sources.xlsx" will be updated as new material is discovered. We welcome every addition or contribution that may help to extend the number of historical sources available and better document the climatic and societal response to the 1108-1110 CE cluster of eruptions. Thank you ;-)!

{"references": ["Guillet, S., Corona, C., Ludlow, F. et al. Climatic and societal impacts of a \"forgotten\" cluster of volcanic eruptions in 1108-1110 CE. Sci Rep 10, 6715 (2020). https://doi.org/10.1038/s41598-020-63339-3"]}