Global Warming and Extreme Weather Events
Büntgen, U., Brázdil, R., Heussner, K.-U., Hofmann, J., Kontic, R., Kyncl, T., Pfister, C., Chromá, K. and Tegel, W. 2011. Combined dendro-documentary evidence of Central European hydroclimatic springtime extremes over the last millennium. Quaternary Science Reviews 30: 3947-3959.
To satisfy these requirements and help facilitate the accomplishment of the associated goals, Büntgen et al., as they describe it, "introduce and analyze 11,873 annually resolved and absolutely dated ring width measurement series from living and historical fir (Abies alba Mill.) trees sampled across France, Switzerland, Germany and the Czech Republic, which continuously span the AD 962-2007 period," and which "allow Central European hydroclimatic springtime extremes of the industrial era to be placed against a 1000 year-long backdrop of natural variations." So what did they find?
The nine researchers found, in their words, "a fairly uniform distribution of hydroclimatic extremes throughout the Medieval Climate Anomaly, Little Ice Age and Recent Global Warming."
This finding, as they astutely state, "may question the common belief that frequency and severity of such events closely relates to climate mean states," which conclusion essentially rebuffs the well-worn climate-alarmist claim that global warming will lead to more frequent and severe floods and droughts. The odds are that if global warming didn't do so over the past thousand or more years, it likely won't do so in the future.
Battipaglia, G., Frank, D.C., Buntgen, U., Dobrovolny, P., Brazdil, R., Pfister, C. and Esper, J. 2010. Five centuries of Central European temperature extremes reconstructed from tree-ring density and documentary evidence. Global and Planetary Change 72: 182-191.
Frank, D.C., Esper, J., Raible, C.C., Buntgen, U., Trouet, V., Joos, F. and Stocker, B. 2010. Ensemble reconstruction constraints of the global carbon cycle sensitivity to climate. Nature 463: 527-530.
Hegerl, G., Luterbacher, J., Gonzalez-Rouco, F.J., Tett, S., Crowley, T. and Xoplaki, E. 2011. Influence of human and natural forcing on European seasonal temperatures. Nature Geosciences 4: 99-103.