Correlations of magnetospheric ion composition with geomagnetic and solar activity

Details Correlations of magnetospheric ion composition with geomagnetic and solar activity Correlations of magnetospheric ion composition with geomagnetic and solar activity

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.9077y&link_type=abstract

Journal of Geophysical Research, vol. 87, Nov. 1, 1982, p. 9077-9096. Research supported by the Swiss National Science Foundati

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208

Earth Atmosphere, Geomagnetism, Magnetospheric Ion Density, Solar Activity Effects, Abundance, Extreme Ultraviolet Radiation, Geos Satellites (Esa), Helium Ions, Hydrogen Ions, Magnetoionics, Oxygen Ions, Plasma Currents, Secular Variations, Solar Wind

Scientific paper

A data set of one-month averages for the energy per charge range 0.9-15.9 keV/e from 48 mos of data gathered by the Ion Composition Experiments on board the ESA/GEOS 1 and 2 satellites in GEO are examined. The readings were taken concurrent with the rising and maximum of the solar cycle from May 1977-Nov. 1981, inclusive. Ion species identified included H(+), He(++), He(+), O(++), and O(+), with a limiting density of 0.001 ions/cu cm. The species were highly correlated with each other and with the Kp index and the solar EUV level. A rise of magnetospheric densities of He(+), O(++), and O(+) ions with the increased solar EUV fluxes was discerned. O(+) density increased with geomagnetic activity, while the He(++)/H(+) ratio remained constant at 0.01. The results are discussed in terms of the composition and dynamics of the solar wind and the high latitude topside ionosphere.

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