Earth's radiation belts' ions: patterns of the spatial-energy structure and its solar-cyclic variations

Kovtyukh, A.S.

Автор: Kovtyukh A.S.
Журнал: Annales Geophysicae
Том: 38
Номер: 1
Год издания: 2020
Издательство: Copernicus Gesellschaften
Местоположение издательства: Germany
Первая страница: 137
Последняя страница: 147
DOI: 10.5194/angeo-38-137-2020
Аннотация: Spatial-energy distributions of the stationary fluxes of protons, helium, and ions of the carbon–nitrogen–oxygen (CNO) group, with energy from E ∼100 keV to 200 MeV, in the Earth's radiation belts (ERBs), at L∼1–8, are considered here using data from satellites during the period from 1961 to 2017. It has been found that the results of these measurements line up in the {E,L} space, following some regular patterns. The ion ERB shows a single intensity peak that moves toward Earth with increasing energy and decreasing ion mass. Solar-cyclic (11-year) variations in the distributions of protons, helium, and the CNO group ion fluxes in the ERB are studied. In the inner regions of the ERB, it has been observed that fluxes decrease with increasing solar activity and that the solar-cyclic variations of fluxes of Z≥2 ions are much greater than those for protons; moreover, it seems that they increase with increasing atomic number Z. It is suggested that heavier ion intensities peak further from the Earth and vary more over the solar cycle, as they have more strong ionization losses. These results also indicate that the coefficient DLL of the radial diffusion of the ERB ions changes much less than the ionization loss rates of ions with Z≥2 due to variations in the level of solar activity.
Добавил в систему: Ковтюх Александр Семенович

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Earth's radiation belts' ions: patterns of the spatial-energy structure and its solar-cyclic variationsстатья Исследовательская статья

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