Abstract
Abstract. 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.
Subject
Space and Planetary Science,Earth and Planetary Sciences (miscellaneous),Atmospheric Science,Geology,Astronomy and Astrophysics
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