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11,400 year sunspot reconstruction. 1950 is year 0 on left side.
Hatching marks the previous period of high activity more than 8,000 years ago which is similar to present level of activity. This period corresponds with the Southern Hemisphere warming associated with the Holocene Climatic Optimum.
[edit] Copyright
Created by SEWilco and released under the GFDL.
Source: Solanki, S.K., et al. 2005. 11,000 Year Sunspot Number Reconstruction. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2005-015. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
[edit] References
- Solanki, S.K., I.G. Usoskin, B. Kromer, M. Schussler and J. Beer (2004). Unusual activity of the Sun during recent decades compared to the previous 11,000 years, Nature, 431(7012): 1084-1087. DOI:10.1038/nature02995 Template:Web reference
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