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Solar Flare Particle Effects and Seasonal Radiocarbon Variations in Tree Rings of the Northern and Southern Hemispheres

Published online by Cambridge University Press:  18 July 2016

Paolo Bartolomei ,
Stefano Cecchini ,
Stefano Cini ,
Menotti Galli ,
Roberto Gaimpieri ,
Cinzia Mongardi ,
Teresa Nanni  and
Agostino Salomoni
Paolo Bartolomei
Affiliation:
ENEA, Ente per le nuove Tecnologie, L'Energia e L'Ambiente, INN-FIS-DIAF, Via dei Colli 16, I-40136 Bologna, Italy
Stefano Cecchini
Affiliation:
Istituto di Technologie e Studio delle Radiazioni Extraterrestri del Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, I-40129 Bologna, Italy
Stefano Cini
Affiliation:
ENEA, Ente per le nuove Tecnologie, L'Energia e L'Ambiente, INN-FIS-DIAF, Via dei Colli 16, I-40136 Bologna, Italy
Menotti Galli
Affiliation:
Dipartimento di Fisica, Università degli Studi di Bologna, Via Irnerio 46, I-40126 Bologna, Italy
Roberto Gaimpieri
Affiliation:
ENEA, Ente per le nuove Tecnologie, L'Energia e L'Ambiente, INN-FIS-DIAF, Via dei Colli 16, I-40136 Bologna, Italy
Cinzia Mongardi
Affiliation:
Lavoro e Ambiente s.r.l., Via Musolesi 1, I-40138 Bologna, Italy
Teresa Nanni
Affiliation:
Istituto per lo Studio dei Fenomeni Fisici e Chimici della Bassa ed Alta Atmosfera del Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, I-40129 Bologna, Italy
Agostino Salomoni
Affiliation:
ENEA, Ente per le nuove Tecnologie, L'Energia e L'Ambiente, INN-FIS-DIAF, Via dei Colli 16, I-40136 Bologna, Italy
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Abstract

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Measurements of ∆14C and δ13C, separately in early wood and late wood of two Mediterranean pine species, with a nearly year-long growth season, were made to better define possible solar flare particle effects. The measurements were made for suitable periods around the years of big flares (e.g., 1942, 1946, 1989) in Pinus pinea of the Adriatic area and Pinus halepensis from South Australia. We found that the 14C concentration is consistently greater in early wood than in late wood of the same growth ring and considerably higher in the Australian samples than in the European samples. The data so far reveal no evidence of solar-flare effect.

Type
IV. 14C as a Tracer of the Dynamic Carbon Cycle in the Current Environment
Information
Radiocarbon , Volume 37 , Issue 2 , 1995 , pp. 593 - 598
Copyright
Copyright © the Department of Geosciences, The University of Arizona 

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