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Proceedings Paper

Evidence of a 125-year solar signal in a 3030-year temperature record from the Sierra Nevada, California, USA
Author(s): Louis A. Scuderi
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Paper Abstract

Tree-ring data have been used to reconstruct mean seasonal temperature (June - January) at treeline in the Sierra Nevada, California, USA, from 1050 BC to the present. Comparison with a temperature reconstruction from Fennoscandia (A.D. 500 - 1980) indicates that the temperature records are significantly related over the common interval and suggests that both are recording a possible common hemispheric/global temperature signal. The reconstruction shows that temperature has varied in a coherent manner, with alternating periods of warm and cold temperatures over the last 3030-yr. Analysis of the spectral properties of the reconstructed temperature series from the Sierra Nevada indicates that the strongest peak is at 125-yrs, corresponding to a pronounced 127-yr peak found in the 570 B.C. - A.D. 1830 quarter section of the detrended radiocarbon production (Q) record, and an approximately 130- yr peak in auroral observations. The peak also corresponds to the findings of significant power between 123 and 143-yr in six of two climate records reported by Rothlisberger. Analysis of the autocorrelation function of the temperature record for lags up to 2500-years indicates a highly significant peak at 2120-years and a set of related harmonics, similar to the fundamental 2120-yr Hallstattzeit and its harmonics.

Paper Details

Date Published: 1 October 1993
PDF: 11 pages
Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); doi: 10.1117/12.157844
Show Author Affiliations
Louis A. Scuderi, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 2019:
Infrared Spaceborne Remote Sensing
Marija S. Scholl, Editor(s)

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