NO/+/ and O/+/ in the high latitude F-region

Details NO/+/ and O/+/ in the high latitude F-region NO/+/ and O/+/ in the high latitude F-region

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974georl...1..239b&link_type=abstract

Geophysical Research Letters, vol. 1, Oct. 1974, p. 239-242.

Physics

3

Auroral Ionization, F Region, Ionic Reactions, Nitric Oxide, Oxygen, Crossed Fields, Ion Recombination, Ionospheric Currents, Ionospheric Drift, Ionospheric Ion Density, Molecular Ions, Photoionization, Polar Regions

Scientific paper

From an analysis of ionic reactions, it is deduced that NO(+) should be an important constituent of the high-latitude F-region. Owing to the rapid increase of the reaction O(+) + N2 yields NO(+) + N with ion velocity and temperature, high latitude electric fields and consequent E x B drifts act to deplete O(+) in favor of NO(+). As a consequence of this and the reduced rate of NO(+) dissociative recombination arising from high electron temperatures, it seems that NO(+) can, at times, replace O(+) as the major F2-region ion in the vicinity of the auroral ovals. The same processes should also be effective in creating nighttime electron density troughs composed primarily of NO(+) in regions equatorward of the auroral ovals where large electric fields are often present.

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