Long term modulation of low altitude proton radiation belt by the earth's atmosphere

Y. Miyoshi, A. Morioka, H. Misawa

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

To evaluate the atmospheric effect on low altitude proton variation, we calculated the long-term variation of the lifetimes of low altitude protons which mirror at the geomagnetic equator using empirical models of the atmosphere, the ionosphere, and the geomagnetic field. The calculated results showed that the proton lifetime variation is anti-correlated with the F10.7 solar cycle. The comparison between the estimated and the observed proton fluxes during 20 years showed good agreement at the altitude of the lower drift shell. Our results showed positively that solar cycle variations of the upper atmosphere and the ionosphere had a significant influence on the changes of the low altitude energetic proton flux.

Original languageEnglish
Pages (from-to)2169-2172
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number14
DOIs
Publication statusPublished - 2000 Jul 15

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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