“…Briffa et al, 1990;Büntgen et al, 2005Douglass, 1914Douglass, , 1920Fritts, 1965Fritts, , 1976Lough & Fritts, 1985, Wilson et al, 2005Woodhouse, 1993). Since nowadays climate trends cause severe extremes, tree-ring research turned to the analysis of impacts of extreme events to figure out how the environment responded to them in the past and estimate how it will in the future.…”