@article{oai:nipr.repo.nii.ac.jp:00002153,
 author = {Uchiumi, Michihiro and Fujiwara, Motowo},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Mar},
 note = {P(論文), This paper describes some computational results on the mesospheric sodium layer using the newly measured chemical reaction rate coefficients. After the most updated neutral chemistry, the calculated winter/summer ratio is consistent with the observational results. The time constant of sodium atoms is found to be shorter than 20s (70-90km). This short time constant invalidates a previous model of sodium gravity waves, which assumes that sodiums are chemically conservative during their vertical moving induced by gravity waves. We proposed a new mechanism here to explain the wavelike structures of the sodium layer drived by gravity waves.},
 pages = {67--77},
 title = {Numerical model of the sodium layer in the mesosphere: Seasonal and diurnal variation},
 volume = {47},
 year = {1987}
}