@article{oai:nipr.repo.nii.ac.jp:00002152, author = {Nomura, Akio and Iwasaka, Yasunobu and Fukunishi, Hiroshi and Hirasawa, Takeo and Kawaguchi, Sadao and Kano, Tetsuo}, journal = {Memoirs of National Institute of Polar Research. Special issue}, month = {Mar}, note = {P(論文), This report describes the lidar measurement of mesospheric sodium layer made at Syowa Station (69°00'S, 39°35'E) in 1985. Our result does not show any pronounced seasonal variation in sodium abundance. Auroral activity may have disturbed the sodium layer significantly.}, pages = {62--66}, title = {Lidar observation of the mesospheric sodium layer in Antarctica: Preliminary result}, volume = {47}, year = {1987} }