Decadal-to-centennial increases of volcanic aerosols from Iceland challenge the concept of a Medieval Quiet Period oleh Imogen Gabriel, Gill Plunkett, Peter M. Abbott, Melanie Behrens, Andrea Burke, Nathan Chellman, Eliza Cook, Dominik Fleitmann, Maria Hörhold, William Hutchison, Joseph R. McConnell, Bergrún A. Óladóttir, Johannes Preiser-Kapeller, Jakub T. Sliwinski, Patrick Sugden, Birthe Twarloh, Michael Sigl