Abstract
One of the substances formed mainly in the stratosphere and entering the troposphere from it is the cosmogenic radionuclide 7Be. Therefore, an increase in its concentration in the air near the Earth's surface can serve as a sign of stratospheric air entry into the troposphere. A hypothesis that the above-mentioned processes can be initiated by the Arctic air intrusions (hereinafter referred to as AAI), has been put forward. The work aims to test the validity of this hypothesis. To reach the purpose, statistical relationships between changes in 7Be fluxes to the Earth's surface, which were determined during consecutive 7-day intervals from March 2011 to April 2020 in Hanover (USA), and variations in duration of AAI occurring in various sectors of the atmosphere over the same periods, were studied. When detecting AAI, information on changes in the normalized atmospheric pressure near the Earth's surface, as well as on variations in the geopotentials of 850, 500 and 300 hPa isobaric surfaces, was used. Sectors with significant correlation between the variations in the total duration of AAI during the sampling periods and the flows of 7Be in these samples have been identified that confirms the hypothesis put forward.
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The research was carried out in the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (No. FNNN-2021-0004).
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Kholoptsev, A.V., Batrakov, G.F. (2023). Arctic Air Intrusions and Changes in 7Be Fluxes from the Atmosphere to the Earth's Surface. In: Chaplina, T. (eds) Advanced Hydrodynamics Problems in Earth Sciences. Earth and Environmental Sciences Library. Springer, Cham. https://doi.org/10.1007/978-3-031-23050-9_15
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