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The AD775 cosmic event revisited: the Sun is to blame
Aims. Miyake et al. (2012, Nature, 486, 240, henceforth M12) recently reported, based on 14 C data, an extreme cosmic event in about AD775. Using a simple model, M12 claimed that the event was tooExpand
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Heliospheric modulation of cosmic rays: Monthly reconstruction for 1951–2004
[1] The differential energy spectrum of galactic cosmic rays in the vicinity of the Earth can be parameterized by the so-called force field model which has only one parameter, the modulationExpand
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Grand minima and maxima of solar activity: new observational constraints
Aims. Using a reconstruction of sunspot numbers stretching over multiple millennia, we analyze the statistics of the occurrence of grand minima and maxima and set new observational constraints onExpand
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Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers
[1] The differential energy spectrum of galactic cosmic rays near Earth is often parameterized by the force field model with the only time-dependent parameter, the modulation potential ϕ. Here weExpand
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A new model of cosmogenic production of radiocarbon 14C in the atmosphere
Abstract We present the results of full new calculation of radiocarbon 14C production in the Earth atmosphere, using a numerical Monte-Carlo model. We provide, for the first time, a tabulated 14CExpand
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ANISOTROPIC THREE-DIMENSIONAL FOCUSED TRANSPORT OF SOLAR ENERGETIC PARTICLES IN THE INNER HELIOSPHERE
We investigate the combined effects of solar energetic particle propagation, parallel and perpendicular to the large-scale magnetic field in the solar wind. Numerical methods employing stochasticExpand
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Evidence for distinct modes of solar activity
Aims. The Sun shows strong variability in its magnetic activity, from Grand minima to Grand maxima, but the nature of the variability is not fully understood, mostly because of the insufficientExpand
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Cosmic Ray Induced Ion Production in the Atmosphere
An overview is presented of basic results and recent developments in the field of cosmic ray induced ionisation in the atmosphere, including a general introduction to the mechanism of cosmic rayExpand
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A physical reconstruction of cosmic ray intensity since 1610
[1] The open solar magnetic flux has been recently reconstructed by Solanki et al. [2000, 2002] for the last 400 years from sunspot data. Using this reconstructed magnetic flux as an input to aExpand
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Cosmic ray induced ionization in the atmosphere: Full modeling and practical applications
[1] We present a physical model to calculate cosmic ray induced ionization in the atmosphere. The model is based on the Monte Carlo CORSIKA tool, which simulates full development of anExpand
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