Physics
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l..34m&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 12, pp. 34-1, CiteID 1593, DOI 10.1029/2001GL013957
Physics
1
Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Ring Current, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Storms And Substorms
Scientific paper
We investigate a solar cycle dependence of singly charged Nitrogen and Oxygen over a five-year period from 1995-2000 on the nightside of the Earth's magnetosphere using instrumentation on the WIND spacecraft. We show that N+, another heavy ion that is of terrestrial origin, is a large fraction of O+, and it contributes significantly to magnetospheric plasma. We find that the N+/O+ ratio has a solar cycle relationship with a higher value of this ratio at solar minimum than at solar maximum. We examine the N+/O+ ratio against thermospheric N/O MSIS 86 model calculations which exhibit no solar cycle variation.
Christon S.
Gloeckler George
Kirsch E.
Mall Ulrich
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