Multidecadal climate oscillations during the past millennium driven by volcanic forcing

A volcanic source of variation The Atlantic Multidecadal Oscillation (AMO), a 50- to 70-year quasiperiodic variation of climate centered in the North Atlantic region, was long thought to be an internal oscillation of the climate system. Mann et al. now show that this variation is forced externally b...

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Bibliographic Details
Published in:Science
Main Authors: Mann, Michael E., Steinman, Byron A., Brouillette, Daniel J., Miller, Sonya K.
Other Authors: National Science Foundation
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2021
Subjects:
North Atlantic
Online Access:http://dx.doi.org/10.1126/science.abc5810
https://syndication.highwire.org/content/doi/10.1126/science.abc5810
https://www.science.org/doi/pdf/10.1126/science.abc5810
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Summary:A volcanic source of variation The Atlantic Multidecadal Oscillation (AMO), a 50- to 70-year quasiperiodic variation of climate centered in the North Atlantic region, was long thought to be an internal oscillation of the climate system. Mann et al. now show that this variation is forced externally by episodes of high-amplitude explosive volcanism. They used an ensemble of climate models to evaluate the causes of the AMO, finding that volcanos are the most important influence, and that there is no evidence to show that it has been internally generated during the last millennium. Science , this issue p. 1014

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