Lidar observations of the mesospheric sodium layer at Syowa Station, Antarctica

Details Lidar observations of the mesospheric sodium layer at Syowa Station, Antarctica Lidar observations of the mesospheric sodium layer at Syowa Station, Antarctica

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..700n&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, July 1987, p. 700-703.

Physics

Optics

14

Antarctic Regions, Atmospheric Composition, Gravity Waves, Mesosphere, Midlatitude Atmosphere, Optical Radar, Sodium, Abundance, Cassegrain Optics, Density (Mass/Volume), Dye Lasers, Etalons, Wave Propagation

Scientific paper

The results of lidar observations of the mesospheric sodium layer made at Syowa Station, Antarctica from April to October 1985 are reported. There is no significant seasonal variation in the abundance or vertical profile of the sodium density. The nocturnal variations show wavelike structures with a period of 3 to 8 hours and a wavelength of 10 to 16 km which seem to originate in gravity waves propagating upward through the sodium layer. However, there is no apparent semidiurnal variation in abundance, which suggests that there is no significant tidal motion in the polar upper atmosphere. The observations confirm the influence of auroral activity on the sodium layer.

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