Temporal ¹⁰Be and ¹⁴C Variations: A Tool for Paleomagnetic Research

Abstract

ABSTRACT. Temporal variations of cosmogenic radionuclide atmospheric concentrations can be caused by such global phenomena as solar activity and geomagnetic field changes as well as atmospheric circulation processes. These causes can be distinguished by the comparison of several isotope records corresponding to the same time period. We discuss a possibility for reconstructing the geomagnetic moment during the last 30,000 years from the comparison of10Be and '4C concentrations in terrestrial archives. The results agree with conventional paleomagnetic data and promise to enrich our knowledge of geomagnetic field variations and reversals.

Reconstruction of solar activity for the last millennium using $^\mathsf{10}$Be data

“…In this paper we develop a physical approach and reconstruct the SN for the last millenium using a physical model relating the concentration of the cosmogenic 10 Be isotope in polar ice and the SN. The 10 Be concentration corresponds well, with a response time of 1-2 years, to the flux of primary cosmic rays in the vicinity of the Earth (see, e.g., Kocharov et al 1989;Bard et al 1997;Beer 2000). We use two sets of 10 Be data shown in Fig.…”

“…The abundance of 10 Be in polar ice is also affected by local climate processes and atmosphere air mass mixing (see, e.g., Kocharov et al 1989;McHargue & Damon 1991). However, the climatic effect is minor for polar sites (particularly for the South Pole) where 10 Be most closely retains cosmic ray signal (Raisbeck et al 1981;Bard et al 1997).…”

The Beginning and Early Years of Radiocarbon Dating in Russia: Laboratories and Personalities

“…In 1998, Kocharov was elected as a Member-Correspondent of the Russian Academy of Natural Sciences (independent from the Russian Academy of Sciences). Throughout his research career, Kocharov published more than 400 papers and 5 monographs (e.g., Dergachev and Kocharov 1980;Kocharov et al 1989;Damon et al 1995;Ogurtsov et al 2002;Koudriavtsev et al 2003), devoted mainly to solar nuclear reactions and the neutrino astrophysics (see also Dergachev et al 2008). During his scientific career, Dergachev has published more than 400 papers, mainly in the fields of astrophysical and geophysical processes, and long-term natural environmental changes; all these studies were based on the investigation of the natural archives of cosmogenic isotopes that are generated in the upper atmosphere.…”