Photochemistry of N2(+) in the daytime F region

Details Photochemistry of N2(+) in the daytime F region Photochemistry of N2(+) in the daytime F region

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7190b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Sept. 1, 1983, p. 7190-7200.

Physics

15

Atmospheric Chemistry, F Region, Ionospheric Ion Density, Nitrogen Ions, Photochemical Reactions, Daytime, Explorer 51 Satellite, Ionization Coefficients, Molecular Ions, Oxygen Ions, Photoionization

Scientific paper

The photochemistry of N2(+) in the daytime F region continues to be a source of concern due primarily to the uncertain roles of the metastable O+(2D) ion and possible vibrational excitation. This investigation adopts a unique subset of data from the Atmospheric Explorer C satellite that spans distinct regions near the low-latitude F peak wherein either chemical reactions or electron processes alternatively control the N2(+) abundances. Concentrations of N2(+) calculated according to current theory and including recent laboratory data for O+(2D) losses via N2 are found to exceed ionospheric observations between 220 and 400 km by a factor near 2. Relevant characteristics of the basic molecular ion concentration measurements are described, along with an analysis for select orbits conducted according to current photochemical equilibrium theory. Possible simple modifications of this theory are discussed in terms of the constraints suggested by the nature of the observations.

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