Plunkett, Gill, Michael Sigl, PilcherJonathan R., McConnellJoseph R., Nathan Chellman, SteffensenJ.P., and Ulf Büntgen. 2020. “Smoking Guns and Volcanic Ash: The Importance of Sparse Tephras in Greenland Ice Cores”. Polar Research 39 (June). https://doi.org/10.33265/polar.v39.3511.