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2015-07-08. Timing and climate forcing of volcanic eruptions for the past 2,500 years.

posted Jul 8, 2015, 3:01 PM by Alan Gould
M. Sigl et al, Nature. For GSS Life and Climate chapter 12. Excerpt: Volcanic eruptions contribute to climate variability, but quantifying these contributions has been limited by inconsistencies in the timing of atmospheric volcanic aerosol loading determined from ice cores and subsequent cooling from climate proxies such as tree rings. Here we resolve these inconsistencies and show that large eruptions in the tropics and high latitudes were primary drivers of interannual-to-decadal temperature variability in the Northern Hemisphere during the past 2,500 years. ...Our revised timescale more firmly implicates volcanic eruptions as catalysts in the major sixth-century pandemics, famines, and socioeconomic disruptions in Eurasia and Mesoamerica while allowing multi-millennium quantification of climate response to volcanic forcing.... http://www.nature.com/nature/journal/vaop/ncurrent/full/nature14565.html