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Use of 10Be in polar ice to trace the 11-year cycle of solar activity

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      Solar Modulation Effects in Terrestrial Production of Carbon-14

      This paper is concerned with the expected deviations in the production rate of natural14C on the earth due to changes in solar activity. We review the published estimates of the global production rates of14C due to galactic and solar cosmic ray particles, and present new estimates of the expected secular variations in14C production, taking into account the latest information available on galactic cosmic ray modulation and long-term variations in solar activity.
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        14C Variations Caused by Changes in the Global Carbon Cycle

        A box-diffusion model for the carbon cycle is used to estimate the magnitude of14C variations caused by changes of reservoir sizes and exchange fluxes in the global carbon system. The influence of changes in atmospheric CO2concentration, biomass, CO2exchange rate between atmosphere and ocean, and ocean mixing is considered. Steady-state14C concentrations as well as the transients are calculated. For changing biomass, atmospheric CO2levels and13C/12C ratios are also calculated.
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          Cosmogenic 10Be concentrations in Antarctic ice during the past 30,000 years

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            Author and article information

            Journal
            Nature
            Nature
            Springer Nature
            0028-0836
            1476-4687
            September 1990
            September 1990
            : 347
            : 6289
            : 164-166
            10.1038/347164a0
            © 1990

            http://www.springer.com/tdm

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