Solar tide in the atmospheric sodium layer

Details Solar tide in the atmospheric sodium layer Solar tide in the atmospheric sodium layer

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sbpc.rept....6b&link_type=abstract

Presented at the 34th Ann. Meeting of SBPC, Campinas, Brazil, 6-14 Jul. 1982

Computer Science

Atmospheric Tides, Mesosphere, Sodium, Wave Propagation, Atmospheric Composition, Atmospheric Density, Diurnal Variations, Optical Radar, Propagation Modes

Scientific paper

Mesospheric sodium layer observations obtained during day and night with INPE's laser radar at Sao Jose dos Campos, SP (23 deg 12 min S, 45 deg 51 min W) are presented. The average variation of the layer during 24 hours displays oscillations with 12 hour and 24 hour periods. The results are interpreted with the aid of a theory of atmospheric wave propagation for minor constituent layers. Oscillations are separated into 24 hour and 12 hour components. The 24 hour component shows the characteristics of an evanescent mode with maximum density occurring at 3 hours. The 12 hour component shows propagation of phase with height and a vertical wavelength of approximately 54 km.

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