Doctoral student Fabio Gennaretti, Professor Dominique Arseneault (both CEN members) and their collaborators, have used tree-ring chronologies to develop climate reconstruction and to verify the impact of volcano eruptions on shifts in the climate. They sampled spruce subfossil trees from six lakes in the Eastern Canadian taiga, a region from which such data was missing to enable scientists to produce consistent chronologies. Their results, published in the high impact journal Proceedings of the National Academy of Sciences USA this summer, show that periods of lower average temperature coincide with series of large volcanic eruptions.
Read the article (in French) of UQAR-Info by Jean-Francois Bouchard (18 august 2014).
Publication: Gennaretti F, Arseneault D, Nicault A, Perreault L & Bégin Y (2014) Volcano-induced regime shifts in millenial tree-ring chronologies from northeastern North America. PNAS. 111 (28) 10077-10082. doi:10.1073/pnas.1324220111