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Possible Cause of Differences between Reconstructions of the Heliospheric Modulation Potential in the Past Based on Data on the 10Be Content in the Ice of the Antarctic and Greenland

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Abstract

The paper presents reconstructions of the heliospheric modulation potential based on data on the content of the cosmogenic isotope 10Be in the ice layers of Antarctica (Dome Fuji). The calculations involve the use of two models that describe the relationship between the 10Be concentration in layers of ice C with the rate of formation of this isotope in the Earth’s atmosphere Q. The first model is described by a linear relationship between these quantities with a constant proportionality coefficient. In the second case, the proportionality coefficient between the concentration C and production rate Q changes over time in the considered model. The differences in the obtained reconstructions of the heliospheric modulation potential from Antarctica data from the reconstruction based on NGRIP data (Greenland) are analyzed. It was shown that the contradictions between the reconstructions can be removed if the dependence of the 10Be concentration in ice layers on the rate of its formation in the Earth’s atmosphere changes with time, which may be the result of climate change. Moreover, these dependences may be different for different regions.

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Kudryavtsev, I.V. Possible Cause of Differences between Reconstructions of the Heliospheric Modulation Potential in the Past Based on Data on the 10Be Content in the Ice of the Antarctic and Greenland. Geomagn. Aeron. 61, 1216–1220 (2021). https://doi.org/10.1134/S0016793221080132

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  • DOI: https://doi.org/10.1134/S0016793221080132

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