Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-23T03:45:06.940Z Has data issue: false hasContentIssue false
  • English
  • Français

Secular Variation of Δ14C During the Medieval Solar Maximum: A Progress Report

Published online by Cambridge University Press:  18 July 2016

P. E. Damon ,
C. J. Eastoe ,
M. K. Hughes ,
R. M. Kalin ,
A. Long  and
A. N. Peristykh
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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. δ14C 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.

Type
Part 1: Methods
Information
Radiocarbon , Volume 40 , Issue 1: 16th International Radiocarbon Conference 16-20,1997 Groningen , 1997 , pp. 343 - 350
Copyright
Copyright © The American Journal of Science 

References

Beer, J., Baumgartner, St., Dittrich-Hannen, B., Hauenstein, J., Kubik, P., Lukasczyk, C., Mende, W., Stellmacher, R. and Suter, M. 1994 Solar variability traced by cosmogenic isotopes. In Pap, J. M., Fröhlich, C., Hudson, H. S. and Solanki, S. K., eds., The Sun as a Variable Star: Solar and Stellar Irradiance Variations. Cambridge, Cambridge University Press: 291–300.Google Scholar
Damon, P. E. 1995 A note concerning “Location-dependent differences in the 14C content of wood” by McCormac et al . In Cook, G. T., Harkness, D. D., Miller, B. F. and Scott, E. M., eds., Proceedings of the 15th International 14C Conference. Radiocarbon 37(2):: 829–830.Google Scholar
Damon, P. E., Cheng, S. and Linick, T. W. 1989 Fine and hyperfine structure in the spectrum of secular variations of atmospheric 14C. In Long, A., Kra, R. S. and Srdoč, D., eds., Proceedings of the 13th International 14C Conference. Radiocarbon 31(3): 704–718.CrossRefGoogle Scholar
Damon, P. E. and Jirikowic, J. L. 1992 The Sun as a low-frequency harmonic oscillator. Radiocarbon 34(2): 199–205.CrossRefGoogle Scholar
Damon, P. E., Lerman, J. C. and Long, A. 1978 Temporal fluctuations of atmospheric 14C: Causal factors and implications. Annual Review of Earth and Planetary Sciences 6: 457–494.CrossRefGoogle Scholar
Damon, P. E., Peristykh, A. N. and Meese, D. A. (ms.) 1997 10Be a/g: Production or accumulation? Paper presented at the 8th Scientific Assembly of IAGA, August 4–15, 1997, Uppsala, Sweden. Abstracts with Programs, p. 191. (Manuscript in preparation for Journal of Geophysical Research.) Google Scholar
Damon, P. E., Sternberg, R. S. and Radnell, C. J. 1983 Modeling of atmospheric radiocarbon fluctuations for the past three centuries. In Stuiver, M. and Kra, R. S., eds., Proceedings of the 11th International 14C Conference. Radiocarbon 25(2): 249–258.CrossRefGoogle Scholar
Damon, P. E. and Sonett, C. P. 1991 Solar and terrestrial components of the atmospheric Δ14C variation spectrum. In Sonett, C. P., Giampapa, M. S. and Matthews, M. S., eds., The Sun in Time. Tucson, University of Arizona Press: 360–388.Google Scholar
Jirikowic, J. L. and Damon, P. E. 1994 The medieval solar activity maximum. Climatic Change 26: 309–316.Google Scholar
Lal, D. 1987 10Be in polar ice: Data reflect changes in cosmic ray flux or polar meteorology. Geophysical Research Letters 14(8): 785–788.Google Scholar
McHargue, L. R. and Damon, P. E. 1991 The global beryllium 10 cycle. Reviews of Geophysics 29: 141–158.CrossRefGoogle Scholar
McCormac, F. G., Baillie, M. G. U., Pilcher, J. R. and Kalin, R. M. 1995 Location-dependent differences in the 14C content of wood. In Cook, G. T., Harkness, D. D., Miller, B. F. and Scott, E. M., eds., Proceedings of the 15th International 14C Conference. Radiocarbon 37(2): 395–407.Google Scholar
Monaghan, M. C. 1987 Greenland ice 10Be concentrations and average precipitation rates north of 40°N to 45°N. Earth and Planetary Science Letters 84: 197–203.Google Scholar
Raisbeck, G. M., Yiou, F., Jouzel, J. and Petit, J. R. 1990 10Be and δ2H in polar ice cores as a probe of the solar variability's influence on climate. In Pecker, J.-C. and Runcorn, S. K., eds., The Earth's Climate and Variability of the Sun over Recent Millennia: Geophysical, Astronomical and Archaeological Aspects. London, The Royal Society: 65–71.Google Scholar
Southon, J. R. and Baumgartner, T. A. 1996 A long-term record of upwelling from the Santa Barbara Basin, Southern California [abstract]. AMS-7: Abstracts of the 7th International Conference on Accelerator Mass Spectrometry. Radiocarbon 38(1): 114.Google Scholar
Stuiver, M. and Becker, B. 1993 High-precision decadal calibration of the radiocarbon time scale, AD 1950–6000 BC. In Stuiver, M., Long, A. and Kra, R. S., eds., Calibration 1993. Radiocarbon 35(1): 35–65.CrossRefGoogle Scholar
Stuiver, M. and Braziunas, T. F. 1993 Sun, ocean, climate and atmospheric 14CO2: An evaluation of causal and spectral relationships. The Holocene 3: 289–305.Google Scholar