Observations of ion and sodium layer coupled processes during AIDA

Details Observations of ion and sodium layer coupled processes during AIDA Observations of ion and sodium layer coupled processes during AIDA

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..487m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 3, p. 487-498.

Computer Science

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23

Atmospheric Ionization, Atmospheric Tides, Ionospheric Ion Density, Ionospheric Sounding, Sodium Vapor, Atmospheric Stratification, Incoherent Scatter Radar, Ionic Reactions, Optical Radar, Sporadic E Layer

Scientific paper

Extended measurements of the neutral sodium layer were conducted at Arecibo during the spring 1989 AIDA campaign. The general nocturnal motion of both the sodium and ion layers is controlled by the tidal wind. These sporadic E and sporadic sodium layers usually occur at the same heights and with a sometimes striking correspondence in the details of vertical and temporal structure. These details are seen most clearly in a series of time-height plots of sodium concentration over which are overlaid the corresponding time-height trajectories of the ionization layers. Included in this series of plots are the two most spectacular of the layering events observed during AIDA. The most intense of the events occurred on the night of 30-31 March and was characterized by ion and sodium layers, with about 6 km vertical extent, that formed near 95 km altitude. The second of the major events occurred on the night of 5-6 April and was characterized by a strong vertical oscillation of the sodium layer with a peak-to-peak amplitude of 2-3 km and a period of 10.4 min.

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