Abstract
Series of data on the concentrations of Be-10 radionuclides in Greenland and Antarctic ices and C-14 radionuclide in tree rings are compared with each other. The existence of substantial divergences between these data series is shown. The Be-10 and C-14 radionuclides are produced in the Earth atmosphere by cosmic rays. However, the comparison of the concentrations of these isotopes with data on the galactic cosmic-ray fluxes measured in stratospheric studies exhibits their weak correlation. At the same time, data on Be-10 and C-14 show a sufficiently strong correlation with global temperature variations of the near-surface air layer within the period of 1880–1986 for which these quantities were simultaneously measured. It is concluded that atmospheric processes noticeably affect the concentrations of Be-10 and C-14 atoms and that the time dependences of these concentrations carry information mainly on variable conditions of the atmosphere, in particular, the global temperature of the near-surface air layer. Thus, it seems to be unreasonable to use data on Be-10 and C-14 for reconstructing both galactic cosmic-ray fluxes and other characteristics of the solar activity in the past.
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