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Unusual activity of the Sun during recent decades compared to the previous 11,000 years [1]

Direct observations of sunspot numbers are available for the past four centuries, but longer time series are required, for example, for the identification of a possible solar influence on climate and for testing models of the solar dynamo. Here we report a reconstruction of the sunspot number covering the past 11,400 years, based on dendrochronologically dated radiocarbon concentrations. We combine physics-based models for each of the processes connecting the radiocarbon concentration with sunspot number.

Publication Date: 
28/10/2004
S. K. Solanki [2], I. G. Usoskin [3], B. Kromer [4]
Nature [5]
431
1084-1087
Tags:
Solar Radiation [6], Physical Science [7], Astronomy [8]

Technology Partners: MimirTech

Source URL: http://admin.indiaenvironmentportal.org.in/feature-article/unusual-activity-sun-during-recent-decades-compared-previous-11000-years

Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/unusual-activity-sun-during-recent-decades-compared-previous-11000-years
[2] http://admin.indiaenvironmentportal.org.in/category/author/s-k-solanki
[3] http://admin.indiaenvironmentportal.org.in/category/author/i-g-usoskin
[4] http://admin.indiaenvironmentportal.org.in/category/author/b-kromer
[5] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-radiation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/physical-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/astronomy