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Secular variation of Delta C-14 during the Medieval Solar Maximum : A progress report

Damon, P.E. and Eastoe, C.J. and Hughes, M.K. and Kalin, R.M. and Long, A. and Peristykh, A.N. (1998) Secular variation of Delta C-14 during the Medieval Solar Maximum : A progress report. Radiocarbon, 40 (1). pp. 343-350.

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Abstract

The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century, we have completed 75 single-ring and 10 double-ring measurements from AD 1065 to AD 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. Delta(14)C decreases steadily during the period AD 1065 to AD 1150 but with cyclical oscillations around the decreasing trend. These oscillations can be successfully modeled by four cycles. These four frequencies are 1/52 yr(-1), 1/22 yr(-1), 1/11 yr(-1), and 1/5.5 yr, i.e., the 4th harmonic of the Suess cycle, the Hale and Schwabe cycles and the 2nd harmonic of the Schwabe cycle.

Item type: Article
ID code: 31947
Notes: 16th International Radiocarbon Conference, GRONINGEN, NETHERLANDS, JUN, 1997
Keywords: Contemporaneous Solar Maximum, Medieval Solar Maximum, solar activity, Suess cycle, Hale cycle, Schwabe cycle, Bioengineering, Polymers and Plastics
Subjects: Technology > Engineering (General). Civil engineering (General) > Bioengineering
Department: Faculty of Engineering > Civil and Environmental Engineering
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 29 Jun 2011 11:30
Last modified: 05 Sep 2014 09:48
URI: http://strathprints.strath.ac.uk/id/eprint/31947

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