Large-scale counterstreaming of H(+) and He(+) along plasmaspheric flux tubes

Details Large-scale counterstreaming of H(+) and He(+) along plasmaspheric flux tubes Large-scale counterstreaming of H(+) and He(+) along plasmaspheric flux tubes

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7879r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 7879-7886.

Other

20

Helium Ions, Hydrogen Ions, Magnetohydrodynamic Flow, Oxygen Ions, Plasmasphere, Space Plasmas, Atmospheric Chemistry, Ion Density (Concentration), Lines Of Force, Solstices, Temperature Distribution

Scientific paper

An interhemispheric plasma transport model is used to study the flow characteristics of H(+), He(+), and O(+) along closed geomagnetic field lines for solstice conditions. The model corresponds to a time-dependent solution of the coupled continuity, momentum, and energy equations for the ions and electrons. The equations are solved along an entire flux tube from 120 km in one hemisphere to 120 km in the other hemisphere. The calculations are carried out for noon conditions for the flux tube passsing through Millstone Hill, at L = 3.2. The main conclusion is that H(+)-He(+) counterstreaming can be expected along a large segment of a plasmaspheric flux tube at solstice. For both symmetric and asymmetric wind patterns, the He(+) flow is from the winter to the summer ionosphere not only in the steady state, but during flux tube refilling due to the winter helium bulge and the depletion of N2.

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