Evaluation of processes that affect the photochemical timescale of the sodium layer

	Evaluation of processes that affect the photochemical timescale of the sodium layer
	Xu, J. Y.; Smith, A. K.
	2005
会议名称	AGU Meeting on Meteors and the Mesopause
会议日期	2005
会议地点	San Francisco, CA
关键词	sodium layer mesopause region timescale photochemistry perturbation
页码	1216-1225
通讯作者	北京8701信箱
英文摘要	We apply the method of the eigenvalue and eigenvector analysis (EEA method) to analyze the photochemical timescale of the sodium layer chemical system to perturbations. The results show that the timescales of three important sodium species, Na, Na+ and NaHCO3, vary strongly with altitude and are significantly different during day and night. For these three species, the EEA method gives a photochemical timescale that differs strongly from the traditional lifetime, defined as the inverse of the photochemical loss rate. For other chemical species in the sodium layer, the two methods of predicting chemical lifetime give virtually identical results. Tests of the sensitivity of the photochemical timescale to changes of the background conditions indicate that the photochemical timescale of Na is sensitive to the changes of the background densities of O-3, H, and O. (c) 2005 Elsevier Ltd. All rights reserved.
收录类别	CPCI
会议录	Journal of atmospheric and solar-terrestrial physics
会议录出版者	Pergamon-Elsevier Science Ltd
会议录出版地	OXFORD
学科主题	空间物理
语种	英语
ISBN号	1364-6826
内容类型	会议论文
源URL	[http://ir.cssar.ac.cn/handle/122/927]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Xu, J. Y.,Smith, A. K.. Evaluation of processes that affect the photochemical timescale of the sodium layer[C]. 见:AGU Meeting on Meteors and the Mesopause. San Francisco, CA. 2005.