Identification of mesospheric heavy ion ledge

Details Identification of mesospheric heavy ion ledge Identification of mesospheric heavy ion ledge

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46...99g&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, Feb. 1984, p. 99-103.

Physics

5

Atmospheric Composition, D Region, Heavy Ions, Ionospheric Composition, Mesosphere, Diurnal Variations, Incoherent Scattering, Ionospheric Electron Density, Molecular Ions, Oxygen Ions, Positive Ions

Scientific paper

For the first time a ground based technique, i.e. incoherent scatter observation of the mesospheric spectra has been utilized in identifying the 'transition height' of simple molecular ions to complex cluster ions around 80-90 km in the D-region. This transition height also matches with the electron density ledge. A substantial diurnal variation of this height is observed. The transition height varies by about 10 km during the course of a day, the lowest being 80 km, near noon. There is also a strong likelihood that both the neutral temperature and effective positive ion mass vary during the course of a day.

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