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Advances in Astronomy
Volume 2012, Article ID 126516, 5 pages
Research Article

Sunspot Cycle 24 and the Advent of Dalton-Like Minimum

Department of Physics and Astronomy, University of New Mexico, MSC07 4220, Albuquerque, NM 87131, USA

Received 12 October 2011; Revised 2 December 2011; Accepted 15 December 2011

Academic Editor: J. Javaraiah

Copyright © 2012 H. S. Ahluwalia and R. C. Ygbuhay. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Ahluwalia and Jackiewicz (2011) have predicted that sunspot cycle 24 will be only half as active as cycle 23, reaching its peak in May 2013±6 months. Here, we discuss the timeline for cycle 24 since its onset in December, 2008 and compare it to the timelines for the last ten cycles (14 to 23) of the 20th century; cycle 24 is rising the slowest. We speculate that cycle 24 may herald the onset of a Dalton-like minimum in the 21st century. The implications of this outcome on global temperature change and ensuing socioeconomic and political scenarios are discussed, on the basis of the historical record.