Auroral N2 vibrational excitation and the electron density trough

Details Auroral N2 vibrational excitation and the electron density trough Auroral N2 vibrational excitation and the electron density trough

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..239s&link_type=abstract

Geophysical Research Letters, vol. 2, June 1975, p. 239-242.

Physics

3

Auroral Zones, Ionospheric Electron Density, Molecular Excitation, Nitrogen, Electron Density Profiles, F Region, Molecular Oscillations, Thermosphere, Wind Effects

Scientific paper

Through various processes molecular nitrogen within the nocturnal auroral oval is vibrationally excited, substantially increasing the rate at which O(+) is lost via the reaction O(+) + N2* yields NO(+) + N. Owing to the action of thermospheric winds and diffusion, N2* does not remain at its point of origin but is transported to regions outside the auroral oval where it can act to substantially reduce the F-region electron density. For an equatorward transport speed of 100 m/sec, N2* can travel 3 to 4 deg of latitude before quenching with atomic oxygen substantially reduces the N2* density. This process may contribute significantly to the formation of the midlatitude F-region electron density trough.

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