@article{oai:nipr.repo.nii.ac.jp:00003693,
 author = {イワサカ, ヤスノブ and ハヤシ, マサヒコ and コンドウ, ユタカ and コイケ, マコト and コガ, セイジ and ヤマトウ, マサヒコ and / and IWASAKA, Yasunobu and HAYASHI, Masahiko and KONDO, Yutaka and KOIKE, Makoto and KOGA, Seiji and YAMATO, Masahiko and AIMEDIEU, P. and MATTHEWS, W.A.},
 journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology},
 month = {Feb},
 note = {P(論文), Electron microscopic observation of individual particles collected in the winter Arctic stratosphere with a balloon-borne impactor showed the possibility that particles containing nitric acid were formed above the background sulfate particle layer during the cold winter season. External mixing of nitric acid and sulfate particles was observed in the region of 18.8-19.6km (the upper part of the sulfate particle layer) during the measurements of January 31,1990. One possible explanation of this phenomenon is sedimentation of nitric acid particle, which has been speculated as an important process causing denitrification of the polar stratosphere and polar ozone depletion.},
 pages = {1--8},
 title = {CHEMICAL STATE OF POLAR STRATOSPHERIC AEROSOLS},
 volume = {5},
 year = {1992}
}