Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea‐ice/ocean feedbacks

  title={Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea‐ice/ocean feedbacks},
  author={Gifford H. Miller and {\'A}slaug Geirsd{\'o}ttir and Yafang Zhong and Darren J. Larsen and Bette L. Otto‐Bliesner and Marika M. Holland and David Anthony Bailey and Kurt A. Refsnider and Scott J. Lehman and John R. Southon and Chance Anderson and Helgi K. Bj{\"o}rnsson and Thorvaldur Thordarson},
  journal={Geophysical Research Letters},
Northern Hemisphere summer temperatures over the past 8000 years have been paced by the slow decrease in summer insolation resulting from the precession of the equinoxes. However, the causes of superposed century‐scale cold summer anomalies, of which the Little Ice Age (LIA) is the most extreme, remain debated, largely because the natural forcings are either weak or, in the case of volcanism, short lived. Here we present precisely dated records of ice‐cap growth from Arctic Canada and Iceland… 
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Causes of climate change over the past 1000 years
  • Crowley
  • Environmental Science
  • 2000
A 21st-century global warming projection far exceeds the natural variability of the past 1000 years and is greater than the best estimate of global temperature change for the last interglacial.