The effect of space weather, proxy parameters of solar activity, and stratospheric phenomena on the concentration of cosmogenic radionuclide 7Be (in the Czech Republic)

0560577 - ÚFA 2023 DE eng A - Abstrakt
Podolská, Kateřina - Kozubek, Michal - Hýža, M. - Šindelářová, Tereza
The effect of space weather, proxy parameters of solar activity, and stratospheric phenomena on the concentration of cosmogenic radionuclide 7Be (in the Czech Republic).
EGU General Assembly 2022. Göttingen: European Geosciences Union, 2022. EGU22-4659.
[EGU22 FAQs. 23.05.2022-27.05.2022, Vienna]
Institucionální podpora: RVO:68378289
Klíčová slova: ionosphere * solar activity * magnetosphere storm * cosmogenic radionuclide concentrations * lidar sounding
Obor OECD: Meteorology and atmospheric sciences
https://doi.org/10.5194/egusphere-egu22-4659

Cosmogenic radionuclides concentrations are predominantly determined by the solar activity and
space weather around the Earth, forming an important source of cosmic-origin background
radiation in the terrestrial environment. The highest values of such radiation are observed during
the solar minima because the penetrability of the Earth’s magnetosphere is greatest at that time.
Beryllium 7Be binds to aerosols and is transported within a few years to the Earth’s surface. Its
concentrations are higher during the spring and summer months when the stratospheric 7Be
penetrates the troposphere as a result of the exchange of air masses between the troposphere
and stratosphere. We compare periods of strong solar and geomagnetic storms with periods of
very low solar activity in the longitudinal view during the years 1986 – 2020.
For a better understanding of the process dynamics, in our work we investigate the coupling of
concentrations of the cosmogenic radionuclide 7Be (time series of activity concentration of 7Be in
aerosols) to space weather parameters around the Earth (Kp planetary index, disturbance storm
time Dst, proton density, proton flux), proxy parameters of the solar activity (intensity of solar
radio flux, relative sunspot number), stratospheric dynamics parameters (temperature, zonal
component of wind, O3
), and aggregates of strong atmospheric frontal transition. The beryllium
radionuclide 7Be concentration was evaluated by the corresponding activity in aerosols on a
weekly basis at the National Radiation Protection Institute Monitoring Section in Prague.
We also perform the case study of cosmogenic radionuclide 7Be concentrations during the period
of strong solar and geomagnetic storm in November 2021 with the ERA5 reanalysis data, and
Aeolus satellite lidar wind measurements
Trvalý link: https://hdl.handle.net/11104/0333452